Best MP4 Video Compressor

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Updated by Kaley Torres - Contact Author

How to Compress MP4 Video File Size with High Quality?

Before anything, simply look at this table which is about the maximum MP4 file size some services can accept when you upload MP4 to them.

MP4 Video Size

Obviously, the file size limit to upload or store an MP4 video is everywhere. We can upgrade our hardware like computer, external hard drive or iPhone to get more storages, however, platforms like Instagram and TikTok won’t give you any upgrade plan even you sacrifice your pocket. Based on the fact, you’d better compress your videos to smaller sizes for uploading to Instagram/TikTok, sending via email or space saving on PC. After test, WinX Video Converter is chosen as the best and affordable MP4 video compressor to compress MP4 video file size with highest quality as much as possible.

WinX Video Converter – Best 4K MP4 Compressor to Reduce MP4 File Size by 40%-90%

WinX Video Converter, a professional video compressor, is able to reduce the file size of any 1080p/4K/8K MP4 fast and in high quality. Be it H.264/AVC MP4, GoPro, DJI, Camera HEVC/H.265 MP4 or so, it easily compress MP4 by 40%-90% without visually quality loss.

How to reduce MP4 file size with it?

  1. Download WinX Video Converter.
  2. Add an MP4 video you want to compress.
  3. Set the compression ratio, change codec format or cut unnecessary parts.
  4. Start MP4 compression.
Compress MP4 with WinX Video Converter

Of course, WinX Video Converter is not the only tool to make MP4 size smaller. Guessing you may want to compress MP4 online, on Windows 10, on Mac, etc. for free for uploading, sharing, collection, emailing or any other purposes, we provide this overall guide to help downsize MP4 including the 4K MP4 files. Simply read our review about all possible MP4 video compressors ranking top out the market and choose the one you prefer.

Part 1. Why You Need to Compress MP4 Especially the 4K MP4 Files?

In reality, no matter you use MP4 or any other format like MKV, MOV, WMV, AVI, etc. to format videos, you may face over sized video problems. Why is MP4 compression in high demand? Simply because MP4 format is the most popular video format as of now. MP4 used to be the best video format with best balances between file size and video quality. However, with video resolutions going higher and higher, the file size of MP4 gets bigger and bigger. To make it clearer, you can check the MP4 file size generated from our daily used devices here.

  • iPhone 12/Pro/Max - a 1080P HD video at 60fps in H.264 MP4 is 175MB per minute, and a minute of 4K UHD video at 60fps takes up 400MB for HEVC.
  • HERO8 camera - a 4K UHD video at 30fps in H.264 MP4 is 480MB per minute;
  • DLSR cameras - a 4K UHD video at 24fps in H.264 MP4 is about 1.1GB to 2.2GB per minute.
1 Hour 4K Video Size
1 hour 4K video size

In conclusion, large sized MP4 videos especially in 4K/8K resolution will take up too much storage space on your computer or external hard drive, the heavy files will make the speed too slow or choppy when uploading, sharing or streaming, and more importantly they will cost you much money to store in the cloud service. That’s why you need to reduce MP4 file size for space saving and money saving.

Part 2. How to Shrink Large MP4 Video?

Commonly, there are 3 main ways to make a MP4 video smaller in size – lowering the MP4 video resolution/bit rate/frame rate, converting MP4 to a lighter format and cut unnecessary parts.

1. Adjust MP4 video parameters

Compress MP4 videos by resetting the parameters together will distribute the video file size, and the changed elements include bit rate, frame rate and resolution.

  • Resolution: The lower width*height/resolution is, the smaller the MP4 video will be. Downscale 4K to 1080p resolution will reduce the file size by up to 75% (with other parameters unchanged). Lower video resolution is also more accepted by platforms like TikTok which only support maximum resolution up to 1080p after all.
  • Bit rate: Setting lower bit rate can achieve smaller video size. But please don’t make it too low, otherwise the image quality can be really bad.
  • Frame rate: Just like bitrate, lowering frame rate (e.g. from 60fps to 30fps) shrinks video size to a certain degree.

2. Convert MP4 to a more efficient codec format

MP4 is a video container that is able to contain different video codecs like H.264, MPEG4, H.265, etc. The codec will determine how efficiently the video data can be compressed. Newer codecs can provide better compression ratios than others, and for example, the H.265 (HEVC) codec can reduce the file size of videos encoded with its predecessor H.264 by up to 50%. Therefore, converting MP4 H.264 to H.265 is suggested to make MP4 videos smaller.

3. Trim/cut unnecessary parts to shorten MP4 video length

This is a conservative way to reduce MP4 file size. By cutting unnecessary parts off, remaining less video contents, or cropping annoying black bars for playback video in full screen, you can get a smaller MP4 video with the original quality.

Part 3. 3 Ways to Compress MP4 File Size Easily

Method 1. Compress MP4 on Windows 10/Mac with WinX Video Converter

Supported OS: Microsoft® Windows 98/NT/2000/2003/XP, Windows Vista/7/8/8.1/10 (32 & 64 bit), Mac OS X 10.6 or above

WinX Video Converter 100% clean and safe software to fullfill common video conversion and compression needs, especially for those newbies who are not skilled with software or computer. It is simple in interface but comprehensive in functionality. Here, as an MP4 compressor for Windows, it can help downsize MP4 videos up to 4K quite easily by changing the 3 elements we mentioned above, say adjusting video parameters, converting format and cutting unwanted parts. Which makes it better than other video compressors out the market including HandBrake and Windows Movie Maker. Let’s take a look at how it shrinks MP4 file size.

Step 1. Free download WinX Video Converter, install and launch it on your computer.

Step 2. Click on "+ Video" on the main UI to add the MP4 video you want to compress.

Step 3. Set the parameters that determine the size of a MP4 video.

  • Choose "HEVC Video (HEVC H.265+AAC)" from "PC General Video" and place the scroll bar to "LQ/Fast".
  • Open "Setting" window to adjust the listed video audio parameters like resolution, aspect ratio, but rate and frame rate.
  • Click "Edit" button to crop and trim video, delete the unwanted video contents or black bars from the sides.
Reduce MP4 File Size by WinX Video Converter
Reduce MP4 File Size by WinX Video Converter

Step 4. After that, simply hit "RUN" button to start compressing your MP4 video.

Top 5 desktop MP4 compressors you can choose:


Compression ratio

Supported formats

WinX Video Converter

Up to 90%





Freemake Video Converter



Movavi Video Converter



Free Video Compressor



Method 2. Reduce MP4 File Size Online with Clideo

Supported OS: Windows, macOS, Android, iOS

Actually there are many free online video compressors offering easy access to downsize MP4 videos. Clideo has clean interface and is recommended here as the best tool to compress MP4 video online. You can upload the MP4 video you'd like to compress from Windows, macOS, Android, iPhone, Dropbox, or video URL, and the MP4 video size will be shrinked automatically.

Step 1. Go to Clideo "Compress MP4" page:, and click "Choose file" button to add your MP4 video.

Step 2. After uploading, Clideo will automatically process and compress your video. For example, I upload a 4.33MB 1080p MP4 video to it, and it compresses the video by 28% and gives me a 3.12MB MP4 video with high quality.

Step 3. When everything is done, you can click on "Download" button to save the compressed video to your PC, Google Drive or Dropbox.

Reduce MP4 File Size Free Online
Reduce MP4 File Size Free Online

However, such online services are recommended if your source MP4 video size is quite small. The maximum size of a video won’t be over 1GB. Besides, the upload and download process especially the long 1080p and 4K videos might take a very long time because the whole process requires an extremely good internet connection and server. What’s more, the online way may not that safe as your personal videos may face privacy leak.

Top 5 Online MP4 Video Compressors:

Tested video:


Compression ratio

Output format

Max file size




500 MB for free


MP4, FLV, MKV, AVI, MOV, 3GP, H.264/H.265





250MB for free




100MB for free





Method 3. How to Compress MP4 Free

Free ways to compress MP4 videos are diverse. Though they have difficulties to compress large-sized MP4 videos like 4K MP4 videos, they are still good choices for standard MP4 files compression. After comparison, the open-source Handbrake and VLC are the most used free tools to help reduce MP4 file size.

1. Handbrake

Supported OS: Windows 7 to Windows 10
Download Link:

Handbrake is a totally free open-source video transcoder, that you can turn help for compressing MP4 on Windows (and Mac/Linux). After opening the source MP4 file, you just need to choose "High Profile" in the right drawer, and then resize the resolution or crop video under "Picture" option, set the video frame rate/quality and optimize video to define the video size. Definitely the lower quality/faster converting speed you set, the smaller MP4 video size you'll get.

Note: If you want to compress MP4 to FLV or other formats or you need full pre-settings about video quality, resolution and bit rate, which will save you much time, Handbrake is not a good choice for you.

Reduce MP4 Video File Size with HandBrake
Reduce MP4 Video File Size with HandBrake

2. VLC

Supported OS: Windows, macOS, iOS, Android
Official download site:

VLC, known as a video player, has a bonus feature of compressing video size. VLC allows users to reduce MP4 video file by lowering video resolution, changing video and audio encoding parameters. Its recording feature can be used to get the video clip you want and cut down MP4 video length for smaller file size.

Step 1. Free download, install and launch VLC on your computer.

Step 2. Click "Media" on the menu bar and choose "Convert/Save".

Step 3. Click "+ Add" button to add your MP4 video and then click "Add/Save" button to go on.

Step 4. Choose profile and do settings by clicking on "Create a new profile" icon. Here, you can adjust bit rate, quality, frame rate, etc.

Step 5. Set the Profile name at the top and then click on "Create".

Step 6. Click on "Browse" button to choose a destination folder to save your compressed MP4 video and click on "Start" to compress your MP4 in VLC.

There's no file size limit when you use VLC to compress MP4 video file size. However, some users report VLC stuttering/crashing during large 4K MP4 video size compression. Anyway, VLC is not designed for reducing video size.

Reduce MP4 File Size using VLC
Compress MP4 Video Size Using VLC

Summary: If you have common MP4 videos to compress occasionally, free online MP4 video compression services like Clideo are good choices. Handbrake or VLC can be used when you don’t care much about compression ratio and output quality. WinX Video Converter shows greater compression ability and outputs the highest quality especially when process 4K/8K heavy files.

WinX Video Converter is the most ideal MP4 compressor emphasizing privacy safety being the top priority. You can rest assured to add any personal home videos to it to process or input a gigabytes of 4K movies to compress, for free up storage space on hard drive or memory card, to upload to web, to send to friends via email, or just for playing on portable devices smoothly.

Frequently Asked Questions

1. Can MP4 files be compressed?

Yes, you can compress MP4 video files. By adjusting the video parameters like resolution, frame rate and bit rate, convert H.264 MP4 to H.265 MP4, or trimming out the unnecessary parts, you can get a smaller MP4 video for collection, uploading, sharing or transferring.

2. How do I make a MP4 file smaller?

There are hundreds of ways for you to make MP4 videos smaller, including desktop software WinX Video Converter, online tool Clideo and open-source methods Handbrake and VLC.

3. How to compress a 4K MP4 video?

To compress a 4K MP4 video with gigabytes to a smaller file with super high quality, downsize 4K to 1080p is suggested. To achieve that, you need a 4K video converter that supports 4K video processing and conversion with best quality possible, and WinX Video Conveter is the only tool you can choose.


author - Kaley Torres

Kaley Torres twitter icon

Kaley Torres is particularly skilled in writing and sharing video-related contents. Her guides cover from deep-seated video/audio parameters, to media entertainment on different platforms. She also enjoys shooting and processing videos by herself for a more reliable basis of informative info with her articles.

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