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The Best 4K Video Upscaler and Downscaler

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[Updated] Top 15 Best 4K Video Converters for Windows (10/11)/Mac

4K video has gained immense popularity due to its exceptional clarity and high-definition visuals. This trend is rapidly expanding, with leading brands like GoPro, DJI, iPhone, and Canon enabling the capture of 4K 10-bit HDR video at stunning frame rates of up to 60/120fps. However, the question remains: is your computer truly equipped to handle the demanding realm of 4K video, and is your 4K TV equipped to upscale lower-resolution content like 480p, 720p, or 1080p with the utmost quality? Unfortunately, this isn't always the case. There are instances where you may require the assistance of a proficient 4K video converter to effectively manage 4K Ultra HD videos. Whether it's rectifying video playback issues or enhancing image quality by converting videos to 4K resolution, a reliable 4K video converter can be indispensable.

Hot search: 20 Best Video Converters That You Can't Miss in 2023

Top 15 Best Free 4K Video Converters in 2023 [Updated list]


Best for


#1. Winxvideo AI

Speedy 4k video conversion with the best balance between quality and size. AI-powered. GPU-accelerated.




Converting 4k video to lower-resolution file without downloading external software.



#3. Flexclip Free Video Converter

Converting 4k video with advanced video editing options.



#4. FreeConvert

Beginners to convert 4k video online without the need to know obscure parameters.



#5. 4K Video Downloader

Online 4k video download and convert.



#6. AnyMP4 Video Converter

Exporting video in 4K with video quality enhancing.



#7. Video Converter 4K/HD 4+ from Sergii Koval

Transcoding 4K video for Mac, iPhone, and iPad.

App Store:


#8. Wondershare Uniconverter

Full-fledge video conversion and editing of 4K, HD and SD files.



#9. Handbrake

Open-source SD/HD/4K video transcoding for advanced users.



#10. VideoProc Converter

Encoding 4K/HD video from any sources.



#11. Acrok Video Converter Ultimate

Basic video and audio file converting tasks.



#12. Any Video Converter

Beginners with basic 4k video conversion needs.



#13. VLC

Handling whatever videos you throw at it, regardless of codecs or resolutions.




Advanced professionals in need of 4K video conversion and editing.



#15. DivX Converter

Basic video converting with support for cloud storage.



Looking for the Best Solution to Convert Video to/from 4K 2160p?

Winxvideo AI is an intuitive and fast 4k video converter program with advanced hardware acceleration. You can upscale 2k/1080p to 4k for enjoyment on 4K screen with best quality and fleetly downscale 4k to any resolution, codec, or format to save space or play on more devices. There is no file size limit, ads, watermark, or software crash.

Why You Need a 4K Video Converter?

Many people have embraced 4K TVs, but the reality is that not everything you watch on them is in true 4K resolution[1]. The majority of videos are still in HD or Full HD quality, and most 4K TVs struggle with upscaling these lower-resolution formats. To truly experience the brilliance of 4K, you need a 4K video converter to elevate your content.

Well, on the other hand, down-converting a 4K video to lower-resolution is still much needed because of the special attributes of 4K itself.

  • A 4k video boasts an impressive resolution of 3840x216 pixels, 4 times that of 1920x1080p.
  • The bitrate is probably between 100-600mbps upon inter/intra compression, thus the file size is shockingly bulky - upon GBs.
  • 4k frame rate reaches up to VFR 60/120fps. This demands high on hardware compared with 4k 30fps or 1080p 60fps video and results in audio video out of sync error while editing.
  • 4k video is commonly encoded with computer-intensive AV1 or HEVC codec, and 10bit color format. This necessitates robust processing capabilities, not only in your PC but also in your editing software and more.

Consequently, it's hardly a seamless experience when you move 4k files from your camera to older PC computer for playing, recreate the 4k videos with Premiere Pro or other editing software, share them on YouTube or other social platforms. Typically, choppy playback and high CPU usage frustrate you on your underpowered computer. Error messages such as "unsupported video codec", "codec missing" pop up when importing 4k footage. Playback gets suddenly laggy while editing 4k video. Uploading the high-resolution video file can be abnormally lengthy. Click here to see the complete 4K UHD video errors & solutions >>

4k playback errors

If you don't plan to update your underpowered computer workstation, and unfortunately the choppy performance still exists even with the help of a 4K video player, it is highly suggested to seek for a capable 4k video converter to remove all the troublesome 4k errors.

In the following section we share a handpicked list of top paid and free 4k video convertes for Windows and Mac to fit your 4k video upconverting and downconverting needs. Here is an at-a-glance look at our top picks. Let's hop into it straightaway.

#1. Winxvideo AI

Best for speedy 4k video conversion with the best balance between quality and size.

  • OS: Windows (11/10/8/7), macOS (Ventura or earlier)
  • Windowsreport rating: 4.8

Winxvideo AI is one of the top 4K video converters that give you an ultimate control over 4K, 5K, 8K, HD 1080p and large video files, no matter they're saved in .mov, .mp4, .mkv, or encoded in H.264, HEVC, VP9, AV1 video codec. It enables you to downscale 4k to 1080p or 720p for virtually all devices without jerky/choppy issues, and take advantages of AI-based Video Super Reoslution [2] to upscale 1080p to 4K UHD with best quality to perfectly fit with bigger 4K screen. You can even convert other file formats like DivX, AVI, WMV, WebM, MTS, MPEG2, VOB, etc freely.

These days, your smartphone, DLSR/mirrorless camera from Canon, Sony, GoPro or DJI can shoot high quality 4K video, but the size of the video file balloons quickly. It's painful when your memory card maxes out or you want to share one of the files on the internet. WinX can compress and resize 4k from GB to MB without losing quality. It also features a basic 4K video editor to cut/merge/crop 4k file.

Winxvideo AI features the unique level-3 hardware acceleration tech, taking advantages of NVIDA CUDA/NVENC, AMD, Intel QSV, and M1/2 chip to improve the efficiency of 4k video encoding, decoding and processing. Meanwhile, High Quality Engine and De-interlacing Engine go into high gear to assure a 4K ultra high quality at fast conversion. This helps to convert 4k video in a flash, and higher video size compression ratio is achieved with only subtle pixel-level quality difference!

What We Like

  • GPU acceleration, 47X real-time faster speed.
  • Batch conversion. Allow 4K video upscaling (AI-powered) and downscaling.
  • An ever-growing list of profiles for PC, TV, mobile phone, tablet, game system, etc.
  • Reduce large 4K video file size to be 90% smaller with lossless quality.

What We Don't Like

  • Absence of ability to burn video to DVD.


Best for converting 4k video to lower-resolution file without downloading external software.

  • OS: web-based
  • Trustpilot rating: 2.3 is a clean and safe online video converter that has been existed for some years. It is able to free convert 4K/HD video to MP4, MOV, AVI, MKV, FLV, 3GP, and other audio formats. Furthermore, you can take advantages of its advanced options to adjust the video quality to full HD, UHD 4K, change the video codec to HEVC, tweak the audio bitrate to 40MB/s, remove audio track, cut the video and more.

One of the main advantages of HDconvert over other online 4k video converters is that there is no file size limit or video length limit. This means you can upload file larger than 1GB with ease. And it is extremely fast with speeds up to 900 frames/second.

Despite boasts of fast conversion up to 900 frames/sec, the upload time is extremely slow in our test. In the meantime, watermark is accompanied with your final video using its free version, the output quality is limited to 720p or lower. If you want to upconvert video to 4K, you need to upgrade to its Premium option starting at $4.99/month to enjoy up to 3 times faster conversion speed, and save the video in higher-quality at up to 4K without watermark.

To quickly convert your 4K video to MP4 or other format with, you can follow the steps below. Upload the source video to the 4k video converter online, click Next and then select a video format like MP4 from the video formats list, click Next and select the video quality 720p (You can also upgrade to its basic subscription to convert video to 1080p or 4k quality), adjust the video settings like codec and bitrate, enable notification, then click Convert 1 File to start the conversion.

What We Like

  • No need of third-party software installation.
  • There is no file size limit.

What We Don't Like

  • Exported video will be watermarked and no video to 4k upscaling unless you upgrade to its Premium edition.
  • Converting speed is unstable.
convert 4k with HDconverter

#3. Flexclip Free Video Converter

Best for converting 4k video with advanced video editing options.

  • OS: web-based
  • G2 rating: 4.4

The third on our 4K video converter list is FlexClip Video Converter. It is an online yet ads-free video converter without watermark. You can get the 4k video converting job done really well, especially when it comes to compressing 4k video to other resolution options like 360p, 480p, 720p or 1080p. It also gives you the options to get desired formats like the most popular MP4 and WebM, and the quality options from Low, Medium, to High.

Flexclip is more an online video editing tool than a video converter. When you've done 4k video conversion, you can go into its built-in video editor to do some edits, such as adding text, filters, rotating video, etc, to your converted 4k file and share your new creation to YouTube or so quickly.

What We Like

  • Built-in video editor.
  • Modern and easy interface.
  • It is free. No ads or watermark.
  • No software download or installation required.

What We Don't Like

  • No option to upscale video to 4K resolution.
  • Limited output format options.
convert 4k with Flexclip

#4. FreeConvert

Best for beginners to convert 4k video online without the need to know obscure parameters.

  • OS: web-based
  • Trustpilot rating: 4.5

FreeConvert is an easy online file converter that helps you free converting large 4K/HD video files up to 1GB, whether they are saved on your device, Dropbox, Google Drive, or URL. It converts more than 60 video formats to popular video format such as MOV, FLV, MP4, MKV, AVI, WMV, 3GP, OGV, WebM, and audio format like OGG, WAV, MP3, FLAC, AAC, M4A, etc. It's even available for you to convert to video device such as Xbox, iPad, iPhone, Android, Kindle and PSP.

You are given full control over the video parameters before conversion, be it video codec, screen size, aspect ratio, frame rate, audio codec, bitrate, channel, or volume. Basic editing features are available for you to cut, rotate, and flip video, add subtitles and make audio fade in and out.

In our test, it took a long time to upload and convert a 4k video, compared with the desktop 4k video converter. The free version is limited to 25 video conversions each day and the online tool is packed full of ads unless you upgrade to its premium edition.

If you have smaller 4K files less than 1GB, follow the FreeConvert guide and convert 4K video for free. Click the Choose Files button to upload your 4K content (no more than 1GB), select a target video format, and choose a desired resolution from the advanced settings > Video Screen Size, then tap the Convert button to initiate 4k video conversion online.

What We Like

  • Support over 2000 file conversion.
  • Add videos from Google Drive, Dropbox, and URL for the conversion.

What We Don't Like

  • Ads contained.
  • Advanced features are available in Premium version.
  • No option to set resolution for the exported video.
convert 4k with FreeConvert

#5. 4K Video Downloader

Best for online 4k video download and convert.

  • OS: Windows, macOS, Linux
  • Trustpilot rating: 4.5

If you want to preserve some clips from online platforms like YouTube, and have them stored locally in a computer, 4K Video Downloader is up to the task. It is a 4K-capable video converter that can 4K and 360-degree videos from various social sites, with subtitles included, convert them into MP4, MKV, and save them quickly, directly to a computer. Any video in ultra HD quality can be downloaded at that same 4k resolution. Just convert clips from YouTube, choose the desired quality, as well as the format, either .mp4 or .mkv, then download.

It is ranked in the ninth place as the best 4k video converter simply because there is occasionally something wrong with the setup file in the installation process. In the meantime, the URL of 4K Video Downloader is changed occasionally for some reasons. This triggers some puzzle when downloading the program. Additionally, it officially mentions the ability to grab YouTube content, which may amount to copyright infringement, if without the permission from the copyright owner. We respect the local law and do not advocate doing so.

What We Like

  • Capable of downloading 4K contents.
  • It supports websites like YouTube, Vimeo, etc.

What We Don't Like

  • The official URL is changed frequently, which seems to be suspecious and untrustworthy.
  • Limited output options to chooose.
convert 4k with 4kdownload

#6. AnyMP4 Video Converter

Best for exporting video in 4K with video quality enhancing.

  • OS: Windows, macOS
  • CNET rating: 4.5

AnyMP4 video Converter is a wonderful video converting program that helps you convert 4K ultraHD, 1080p, HD, and general videos to a range of formats like MP4, MOV, MKV, AVI, WMV, and even 3D videos. It also includes the latest profiles for 4K HEVC video, 4K H.264 video, 4K WebM video, etc. That means you can even convert video to 4k file so as to enjoy it on 4k-capable screen.

One of the major reasons we add AnyMP4 to the ranking list of the best 4K video converters is its intuitive option to improve the video quality of low-resolution video. Specifically, you can get superb quality by upscaling low-resolution 720p or 1080p video to higher 4k resolution video, optimize the brightness and contrast, remove the dirt-like video noise, and reduce shaking motion at the click of a button. This makes it good enough to compete with the other video converting software.

Besides, you can also rotate and flip video, trim the video length, merge video clips and export them to a single file, enable 3D settings, apply video effect, add text/image watermark to the source video.

What We Like

  • Offer 2D to 3D conversion.
  • One-click video quality enhancing.
  • Over 200 video formats supported.

What We Don't Like

  • Free version has limited features.
  • Intel Acceleration cannot be enabled unless you upgrade to paid version.
  • Occasional software crash during conversion.
convert 4k with anymp4 video converter

#7. Video Converter 4K/HD 4+ from Sergii Koval

Best for transcoding 4K video for Mac, iPhone, and iPad.

  • OS: iOS, macOS
  • App Store rating: 3.7

Video Converter 4K/HD 4+, developed by Sergii Koval, is designed for iPhone iPad users to convert 4k/1080p videos with crisp details and smooth motion. It is also available for you to resize video, rotate video, delete metadata, customize video settings like format type, bitrate, frame rate, sample rate, etc, and more. The latest version is 1.8.3. Besides working with iPhone and iPad, it can also run on Mac with Apple M1 chip or later. It is one of the only program that can be downloaded directly through from the App Store in our 4k Video Converter list. So it's definitely safe to use it if you want to transcode ultra HD video files on your iDevice without worrying about malware or spyware.

Video Converter 4K/HD 4+ is built with video editing features. With it, you can speed up or slow down 4k file, trim and merge videos, add text contents or stickers on the 4k video, and more. Particularly, it is designed for output 4k and HD video for social networks, e.g. Facebook, Instagram.

This 4k video converter only works with Apple ecosystem. If you need to encode 4k video on Windows or Android platform, you need to resort to other video transcoder programs.

What We Like

  • Resize 4k for social media.
  • More editing options, including trimming, merging, adding stickers, transition, etc.

What We Don't Like

  • Output formats are limited to MP4, M4V and MOV only. It isn't windows-ready.
sergii koval 4k video converter

#8. Wondershare Uniconverter

Best for full-fledge video conversion and editing of 4K, HD and SD files.

  • OS: Windows, macOS
  • Caoterra rating: 4.6

Uniconverter is the go-to tool for your 4k video conversion needs. It features a modern interface that holds all the essential features, from video/audio converting, recording, compressing, downloading, to editing. It is able to convert 4k video to nearly 1000+ formats together with preset profiles for the mainstream devices. Besides, video transfer, batch processing, and DVD burning for more advanced users' needs.

Uniconverter is praised for its one-stop shop for video processing. There are significant perks if you pay for a subscription. It assists with more video editing such as video background removal, video merging, etc in addition to video conversion.

It is somewhat expensive, and HEVC conversions are relatively slow in our test. In the meantime, users on the trial version will have to make their peace with advertisements inducing you to upgrade to its premium edition.

What We Like

  • Record screen with audio narration.
  • Burn to discs.
  • Support converting VR and making GIF.

What We Don't Like

  • Confusing interface.
  • Not the cheapest option.
convert 4k with uniconverter

#9. Handbrake

Best for open-source SD/HD/4K video transcoding for advanced users.

  • OS: Windows, Linux, macOS
  • G2 rating: 4.1

Handbrake is an open source video transcoder that can free convert 4K (4096x2160 and 3840x2160) or 2K footage to popular formats like MP4 and MKV. It also works as a free 4k upscaling software that includes 4k presets so that you can export 2160p content for 4k capable device like Roku, Apple TV 4k, Chromecast, etc.

Handbrake started 4K support in version 1.1.0 in 2018. Now you can upgrade to the latest Handbrake v1.5.1, a rebuild of Handbrake 1.5, for more fluid hardware accelerated 4k video converting. But please make sure to install Microsoft.NET desktop runtime version 6.0.0 or later on Windows PC. Learn more about how to use Handbrake >>

The good thing we experienced with the free 4k video converter is the support for batch processing in the queuing feature. This is especially helpful to encode a folder full of 4k x265 files freely in one fell swoop. Bsides, the updated Intel Quick Sync to use the Intel OneAPI Video Processing Library helps 4k video transcoding even faster in our test.

Handbrake is not very approachable look. Although it is packed with a handful of options available to customize precise encoding settings, tweak frame rate, and more, it means something of a learn curve to some extent, especially if you are just a beginner.

Therefore, converting 4k video with Handbrake is a little bit complicated since there are a lot of tweaks. But you can do the job quickly if you don't adjust the advanced settings. Here we go. Open Handbrake, load the 2160p video file. Choose a format from a preset, where you can export video in 4K HEVC MKV or select the output format like MP4, WebM or MKV. Additionally, resolution can be enhanced up to 8k 4320p from the Dimensions section. If you'd like to downscale a 4k file to 1080p or lower-resolution video, you can also choose the 1080p or 720p ready-made profile from the list. Leave the settings unchanged, and click Start Encode button to begin transcoding 4K video file.

What We Like

  • Free and open-source.
  • Lot of advanced settings options.
  • Direct DVD converter.
  • Support a large library of codecs like HEVC, H.264, VP8, DivX, etc.

What We Don't Like

  • Limited output file format supported.
  • Not so user-friendly for beginners.
handbrake convert 4k

#10. VideoProc Converter

Best for encoding 4K/HD video from any sources.

  • OS: Windows, macOS
  • Capterra rating: 4.3

Despite VideoProc Converter made its first debut 4 years ago, it does impresses us a lot. As a one-size-fits-all video converter, you can not only convert 4K/HD/SD video to any format, resolution, or codec, but also do some advanced edits, even video record and adjustment. According to our test, VideoProc Converter can well handle 4k video, whether it is in HDR, HEVC, or 10 bits, and finish the conversion task within one fellow swoop, thanks to its intuitive interface.

VideoProc Converter is especially designed for GoPro users. It supports any 4K video from even the latest GoPro Hero 11. If you have any problem with playing 4K recordings, you can take advantages of the video converter to deshake, denoise, color-correct, and even remove fisheye from the original footage.

VideoProc Converter is 49 MB in size, that is relatively huge compared with other desktop software. We are unfortunate to find the Blu-ray convert feature is excluded from the software.

What We Like

  • Support video codecs like HEVC, H.264, VP8, DivX, etc.
  • Especially designed for GoPro.

What We Don't Like

  • The tool does not work on Linux.
  • Free trial only allows a 5-min media file.
convert 4k with VideoProc Converter

#11. Acrok Video Converter Ultimate

Best for basic video and audio file converting tasks.

  • OS: Windows, macOS
  • Talkhelper rating: 3.7

Acrok Video Converter Ultimate is included in the list of top 4K video converters for its ability to convert 4K/1080p videos, particularly output from Blackmagic camera, to video formats compatible with editing software like Premimere pro CC, Vegas Pro 17, Davinci resolve and more.

Acrok Video Converter Ultimate supports 4K videos output from almost all cameras or camcorders, such as Canon, Nikon, Sony, Panasonic, JVC, Blackmagicdesign, etc. It also supports NVIDIA CUDA and ATI Stream acceleration technologies for streaming 4K videos fast.

It seems Acrok needs to change the visual appearance since the interface looks outdated. Plus, the custom options are limited, and the quality of output files is not so good as that of other 4k video converter tools.

What We Like

  • Solid conversion speed.
  • Process multiple video files at a time.

What We Don't Like

  • Free version watermarks the exported video.
  • Somewhat more expensive than other similar tools.
acrok video converter ultimate

#12. Any Video Converter

Best for beginners with basic 4k video conversion needs.

  • OS: Windows,macOS
  • Trustpilot rating: 3.4

Any Video Converter is introduced with the ability to convert any video file, including 4K UHD video. It boasts a fairly wider compatibility with a long list of options, incl. 100+ inputs and 160+ outputs. This means you can get to video conversion quickly without the need to tinker with the complicated parameters. You are also guaranteed to convert 4K 60fps HEVC video to H.264 or downscale the resolution from 4K to 1080P or 720P for playback on underpowered devices smoothly.

Nvidia NVENC, AMD and Intel QSV Hardware acceleration is enabled for conversion acceleration. Additional features like DVD burning, video editing and playing can be enjoyed.

Personal 4k video converting experience tells that the quality it outputs is far from good as the original 4K. Typically, there are mosaics, and you would notice buggy playing with a blank screen in the window. What's worse, AVC will include bundled extra software that you won't need and constantly nag you to purchase the pro version.

But if you value its functionality, follow the steps and learn how to export 4K in any video converter. Launch the tool, click Add Video(s) to load the source file from the local drive, choose a format from the profile list, unfold the Video Options and Audio Options to adjust the file if necessary, unfold the Basic settings and adjust the video size to 3840x2160p, then click Convert New to start encoding video to 4k resolution.

What We Like

  • Support DVD video extraction.
  • Bonus filters and effects.
  • Frequent updates.

What We Don't Like

  • Unnecessary software is installed during setup.
  • It takes a long time to convert 4K videos.
  • Converted video is pixelated to some degree.
convert 4k with Any Video Converter

#13. VLC Media Player

Best for handling whatever videos you throw at it, regardless of codecs or resolutions.

  • OS: Windows, Linux, macOS
  • CNET rating: 4.2

VLC is known as a free impressive media player to play 4K, 8K and other video/audio files without downloading additional codecs. It can also convert videos from one storage standard to another, including MP4, MKV, WMV, AVI, MOV, RAW and more. Starting from version 3.0, VLC is also used as a free 4k to 1080p video converter if playing 4K is somehow stuttering.

In spite of the fact that VLC is mainly used for playing media files, it has many editing features. You can cut or crop your 4K video, reverse your file, and so on.

VLC is a media player by default. Converting 4K videos can be a little bit confusing as there is no Export or Convert button in the interface. Meanwhile, hardware acceleration is mainly applied to HD/4K video decoding rather than encoding. This means transcoding 4k video can be a little bit slower than professional video converter software.

If you are not planning to download any third-party 4K video converter, VLC is still a good choice. You can follow the step-by-step tutorial to convert 4k videos with VLC. Open the program, click on Media button > Convert/Save button, click +Add… and choose a 4k video source you want to convert, hit the Convert/Save button, choose the file name of your video and select the desired format from the Profile drop-down list, click Start to begin the conversion.

What We Like

  • It's free and open-source.
  • Work on all platforms.
  • Support the largest library of video and audio codecs. No external codecs required.
  • Offer video and audio download options.

What We Don't Like

  • 4k video converting takes a lot of times.
  • No editing tools.
VLC convert 4k video


Best for advanced professionals in need of 4K video conversion and editing.

  • OS: Windows, Linux, macOS
  • G2 rating: 4.5

FFmpeg is a free and open source software project containing libavformat, libavcodec, libavutil, libavdevice, and more, which can be used by applications. It is skilled in every task related to media file, be it media compression, file type conversion, or video recording. It is able to convert and compress 4k with huge data size to a compact file (something like 800 to 20MB) after rendering.

In addition to having great flexibility over demuxing, decoding, processing, encoding, and settings, FFmpeg can crop, stream, merge audio and video from different sources and perform many other tasks, with superb speed.

FFmpeg is inferior to other 4k video converters as it has a little bit of a steep learning curve. Almost 99% of users are scared from using the tool since they won't have a clue how to use it or know what a command line is.

What We Like

  • Support an extensive list of formats including HEVC, H.264, MPEG-4, ProRes, SWF, etc.
  • Offer video streaming and web hosting capabilities.
  • Work on Linux, OS X and Windows.

What We Don't Like

  • It is intimidating and not easy for beginners to use.
  • Confusing documentation.
convert 4k with FFMPEG

#15. DivX Software

Best for basic video converting with support for cloud storage.

  • OS: Windows, macOS
  • CNET rating: 3.6

DivX Software is an award-winning video software for Windows and Mac that features three components including high-quality video player, media server, and DivX converter. With the DivX Converter you can convert high quality HEVC, DivX, AVI, and MKV up to 4K. This software also help you convert large 4K video to small sizes without noticeable loss in quality.

DivX Converter features many other advanced options such as non-encrypted DVD backup, basic video editing, cloud connect, Wavefront parallel processing, Target Quantizer, and more.

The program sometimes freezes. Most of the time, fast conversion speed is only limited to paying subscribers. In addition, You may be bombarded with ads unless you pay for DivX. But you can import video from Google Drive and Dropbox, get audio enhancement, more profiles, more custom settings options, and a faster converting speed in Pro version.

What We Like

  • Offer a higher degree of large video compression.
  • Support Cloud connect and DVD backup.

What We Don't Like

  • You may install additional software unwittingly.
  • Free version contains ads and upsells.
convert 4k with divx converter

How to Convert 4k Large Video Fast and Losslessly on Windows 10/11 and Mac

The above list of 4k video converters are a great helper to convert 4k videos. But do you know how to decode and encode 4k videos for diversified occasions? The following section will cover the guides of how to convert 4K video codec from HEVC to H.264 for better compatibility, compress 4K to 1080p HD to downsize video, and upscale 720p/1080p HD to 4K for better quality with the aid of Winxvideo AI.

Guide 1. How to Convert 4K HEVC to H.264 MP4?

What problems does it solve? If you've ever run into the problem of "codec not supported" error, it could be possibly because of HEVC used for encoding 4K video. Windows 10 or 11 doesn't support decoding HEVC unless you install HEVC codec extension beforehand. In this way, you can try the steps below and use the most compatible codec H.264.

Step 1. Free download and install Winxvideo AI on your for Win 11 or earlier. Launch the program, select Video Converter, and click + Video button to load your to-be-converted 4K (HEVC) video on computer. The free 4k video converter supports any 4k video sources, be it is saved in XAVC S-I, XAVC HS, MOV, MP4, MKV, Cineform, Prores, or so. Besides, you're allowed to insert multiple video clips for batch conversion.

4K video converter

Step 2. Go to Target Format > Video and select MP4 (h264) to transcode 4K HEVC to H.264.

Step 3. Click Browse button to specify the output folder path if necessary. Then tap RUN button to transcode HEVC encoded 4K videos to H.264 MP4. Then you can feel free to import the final video to your editing program and play it on Windows PC/Mac, iPhone iPad, Android, XboX One, PS4, HDTV, and more fluidly.

Convert 4K HEVC to H.264 MP4 for better compatibility

Guide 2. How Do I Convert 4K to Normal 1080P?

What problems does it solve? It's reported only 2.4% of displays support resolutions of up to 3840x2160p. There are still a great many devices cannot handle 4k resolution videos. In addition, 4K is too heavy of a workload for most laptops and is way bigger than 108p or other HD videos. So if you want to save more space of your hard drive, and your computer display, or GPU is not up for 4K, it's a must to downscale 4k video to 1080p or below. Here is the detailed guide.

Step 1. Go the same steps to import large-sized 4K UHD videos to this 4K video converting software.

Step 2. Choose output format. You can continue with your source 4K video format, or choose MP4 as output format for better compatibility.

Step 3. Click the gear-shaped Setting button to enter the parameter setting window.

downgrade 4K to 1080p

Then click on Resolution to open the drop-down menu, where a wide range of resolutions are available for your choice. Then you can choose to lower the resolution from 3840x2160p to 1920x1080p, which is always recommended for great image quality on mobiles, game consoles, desktops and so on. Here are the detailed steps to downconvert 4k to 1080p >>

downgrade 4K to 1080p

Optionally, you can also downscale the video bit rate, lower 4K 60fps frame rate to 30fps, change aspect ratio for widescreen display, or alter audio settings in this parameter setting window. Winxvideo AI is able to shrink 4k video size by over 90% with just pixel-level difference. You can click for detailed tutorial to reduce video file size >>

Step 4. Hit RUN button to start converting and compressing 4K videos. Then you can store more video in your storage device, smartphone, cloud service etc and upload the video faster.

Guide 3. How Do I Convert 720P/1080P to 4K?

There are occasion that the video looks blurry on 4k TV or other monitor when you are trying to watch 1080p HD or SD content. This is because the low-quality content is not providing enough information to fill out the 4k display, thus the bigger and sharper screen makes low-quality content looks poor. You can follow the steps to upscale the blurry SD/HD quality source to 4K with best quality, so you can enjoy the immersive "upconverted" 2160p video on fabulous 4K TV/consoles.

Step 1. After you free download and install the 1080p to 4k converter, open it, select Video AI, and then click Add Video button to import the 720p or 1080p video for 4k upscaling.

4K video upscaler

Step 2. Enable Super Resolution, specify Type and Model settings. If you want to convert a 720P video to 4K, select 3X. If you want to convert a 1080P video to 4K, select 2X.

Step 3. Specify Export Settings, including video codec, audio codec, quality level, GOP, and save path.

Step 4. Hit RUN button to accomplish HD to 4K upscaling at 47x real-time faster speed.

Upscale 720p/1080p HD to 4K

Additional Guide: The 4K video converter also helps to change video frame rate from VFR to BFR and convert video to Prores codec, both of which are much great for video editing. If you run into the error of 4k video/audio out of sync or laggy editing problem with your 4K video, you can try the tool to convert 4k video and tweak the setting before importing to editing program.

Related: Click to see how to change video resolution freely?

How We Test the Free 4K Video Converters?

Since 2006, WinXDVD Software has tested and rated thousands of video converter tools to help you make better decision. Regardless of the brands of 4k video converters we review, they're all subjected to a similar testing regimen: we use them under the same test environment, including the CPU, GPU, RAM, etc. Below we explain how we test and rank these tools.

1. Product testing. To start with, we look at the software's interface, overall features, and check their usability and easiness. When it comes to performance, we try these 4k UHD converters one by one to check video conversion speed and CPU usage, the final video quality and file size. We also test the 4k videos in both HEVC and H.264 codec and with video file size up to GB, to see whether these tools can handle the video codec well or if there is some crashing or file size limit while transcoding.

2. User and editor reviews. Reviews from both first-hand users and prestigious media such as G2, Techradar, CNET, etc are collected as one of the most important factors in ranking these 4k converters.

We then take everything we've learned about the 4K video converters, before reaching our final conclusion.

FAQ about 4K Video Conversion

Q1. Can you convert a video to 4K?

Yes. Many programs do 4k upscaling. But there is no guarantee the upconverted footage gets better looking. At this point, the original video source, viewing distance and the screen play an important role if the quality matters a lot.

To be exact, pixels will be stretched bigger than they are made to be stretched, but the image quality is not truly 4k quality. If you watch the upconverted video on a large 4k screen, it will look pretty bad. This is especially true with your SD quality video such as 360p or 480p video. Only when the screen is small or the viewing distance is great, will there be less jarring between 4k and the upconverted video. So it's not advised to convert SD video to 4k, instead you can convert 720p or 1080p video to 4k with Winxvideo AI.

Q2. How do I convert 1080p to 4K?

Converting 1080p video to 4k means you can play it on a larger screen without pixelated problem. For the recent 4K TVs, they are equipped with upscaling tech that can upscale your lower-resolution content to fill the entire 4K TV screen. But if you want to upconvert 1080p to 4K on PC, you need to rely on a 4k video converter software. Winxvideo AI is one such tool built in unique motion-adaptive 4k scaling algorithm, meant to fill new interpolated pixels into the source 1080p video intelligently.

To do the job, just feel free to download the 4k converter on your PC, load the source 1080p video in whatever format, choose the output format 4K MP4 video, click RUN, and leave the program doing the rest.

Q3. Can converting affect 4K quality?

It depends. Any video compression will result in quality degradation, let alone 4k video transcoding. But if you just want to convert 4k video from one video format to another, without tweaking the video codec, bitrate, frame rate or so, there is no quality loss at all.

Q4. What's the best 4K video converter?

We've already listed the top video converters designed for 4K UHD video, with Winxvideo AI and Handbrake leading the pack. Generally, it will have a large range of format options, available to change video file into a different format or a compact file, either to play on a particular media player, or allow for a more efficient video editing process, fast sharing, and less consumption of space on your device. You can choose the one based on your specific needs. But there are key factors to be considered.

  1. Fast 4k converting speed: Speed is a key factor. Incapable tool will take a long time to convert 4K to 1080p video, and worse still crash when handling large 4k HEVC file. Resorting to a 4k video converter with hardware acceleration enabled is a cut-through way, as it utilizes GPU to decode, process and encode the massive data of 4k and spares CPU for other tasks, and thereby saving you a lot of time.
  2. Good 4k compression ratio: The good news is that almost all video converters can downsize 4k easily while the bad news is that you will lose video quality inevitably. So balancing the quality and file size is known as a crucial factor for the best 4k video converter.
  3. Customizable 4k video settings: Statistically, the current 1920x1080 display resolution accounts for 67%, which means playing 4k on the screen cannot be satisfied. Meanwhile, most video editors cannot handle variable frame rate and HEVC codec well and will result in A/V sync or codec error when processing 4k file. To the end, it will be the icing on the cake if the 4K video transcoder is available for you to tweak the video resolution, codec, frame rate and other parameters.

Free download Winxvideo AI to solve all 4K video errors >>

Q5. Is online 4K video converter better than desktop software?

No. Despite online 4k video converting tool is easy to use and finish the 4k conversion process without any installation of third-party software, it is inferior to desktop program in terms of security.

On the one hand, online tool can be a privacy threat. This is because the 4k video conversion has to be done by upload your source file to third-party servers. This means your private file is expose to the website administrator, your IP addresses and personal information are deliberately collected, and therefore at risk of being leaked. While desktop 4k video converter can be safer for protecting your privacy compared with online tool. On the other hand, online video converters have intrusive ads, which you may click by mistake and therefore lead to some virus or malware.

Q6. How long does it take to convert a 4k video on PC/Mac?

It depends on both your hardware and software you have. Newer computers are equipped with faster GPUs that deliver hardware-accelerated 4K video processing functions. Capable video converter also may feature professional kernel and take advantage of the hardware acceleration to decode and re-encode 4K video at a dramatically accelerated speed. In reviewing the best 4K video converters, all the above tools are tested and WinX Video Converter get a good account of itself, with a conversion frequency reaching up to 197fps on Intel i7-12700K 5.0GHz.

Q7. What is the minimum system requirement for 4k video?

To smoothly handle 4K video files, make sure that a qualified computer is in use. Here goes the minimum system requirements for 4K playback.

Minimum System Requirements

4K HEVC video Playback


7th generation Intel Core i7 (Kaby Lake) processor equivalent or better, 3.5GHz or better


Intel® Iris™ Pro Graphics 5200
Intel® Iris™ Graphics 5100
Intel® HD Graphics 4200 or newer
Nvidia GeForce GTX 650 Ti or newer
AMD Radeon™ HD 7000 Series or better
GTX 1660Ti or newer will be good for 4k editing.


8GB or more

Hard Drive

1TB with at least 400M/S transmission speed for 4k video editing

Operation System

Windows 11/10/macOS High Sierra or later


HDMI 2.0 or DisplayPort 1.2 for 4k 60fps
HDMI 2.0a or DisplayPort 1.4 for 4k HDR


Make sure your 4k display is set to run at 3840x2160
at least a 60Hz refresh rate and HDCP 2.2


HEVC video extension

Internet bandwidth

At least 25 Mbps

If you are not planning to upgrade your computer system and handling the computer-intensive 4K video is a little bit troublesome, such as freezing and laggy playback, you can resort to a 4K video converter to transcode 4K video to a more compatible format for later playback smoothly.

External Source Links:

1. What is 4k video? [wiki]: 4K resolution has already won a wide hardware and software support, which is on the way to insurgently overtaking other video resolutions like 1080p High Definition format.4K Ultra HD (4K UHD) video itself refers to the video of a pixel resolution of 4096x2160 (4,000 pixels, 8.8 megapixels, 17:9 aspect ratio) mainly for digital cinema, or of a resolution of 3840× 2160 (8.3 megapixels, 16:9 aspect ratio) mainly for Ultra HD television.

By far, AV1, HEVC/H265 codec and VP9 codec are driving the developement of 4K Ultra-high definition videos. 4K is four times of the resolution of 2K projector and 1080p HDTV. At 4K resolution, every single details and Close-ups on the image can be seen. If adopting the amazing 4096x2160 UHD resolution in cinema, a film can deliver an indescribable and unprecedented enjoyment for audiences at any angle for the crystal clear picture, sparkly bright color and Hyper-reality sound (if any).

2. Video Super Resolution[wiki]: Short for VSR, refers to the process of upscaling a video from the given low-resolution frames to high-resolution frames. It aims to not only restore more fine details, save coarse ones, but also preserve motion consistency. Traditional methods include iterative back-projection methods, non-parametric algorithms, etc optimize the video super-resolution task, while deep learning based methods such as VSRnet, RVSR, EDVR, 3D convolutions, etc spectacularly improve the video quality during upscaling.


Estrella H.

Estrella H. twitter icon

Estrella H. is a senior editor at Digiarty covering all the latest tech in mobile industry for the better part of the first four years, from iPhone, Samsung to other innovative gadgets. And now she's been dived into data backup and management to keep data safe on mobile devices in the recent three years. Outside the tech, she is a songwriter and loves hip-hop.

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