Video Compressor

World's best video compressor tool to reduce video file size

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Max file size 1GB. Upgrade to Pro Sign Up for more

Video Quality & Size
H265 codec can reduce video size 20-75% more compared to H264 (especially high-resolution video)
Choose "Target a file size" to get an exact output file size. Choose "Target a video quality" when quality is of importance.
Select a target file size as a percentage of the original. Smaller values compress more. For example, a 100Mb file would become 25Mb if you select 25%.
Only use this option if you plan to play the video on a really old device or if you are having playback issues (it compress less)
Subtitle Settings
Select the best option for your subtitles: 'Upload' to add your own, or 'Copy' to replicate from the original file.
Choose a file Browse
Upload a .srt or .ass file.
Hardsubs, always visible and integrated into the video, are suitable for permanent captions, while softsubs, stored separately, can be turned on or off for customized viewing.

How To Compress a Video?

  1. Click the “Choose Video” button to select your video file 
  2. Keep the default options (they do a great job!) or specify advanced options 
  3. Click on the “Compress Video” button to start compression 
  4. When the status change to “Done” click the “Download Video” button 

World's best video compressor to compress MP4, AVI, MKV, or any other video file. Choose the default options to compress video size by 40%, or choose a custom size.

We use two popular video encoding methods that are supported by most modern devices and browsers: H.264 and H.265. Out of these two encoding methods, H.265 yields better compression, especially at higher resolutions such as 1080p or 4k.

How to play compressed video?

Codecs we use for compression are supported by all major browsers and devices. So you should not have any playback issues. If any issues, try opening the video with the free VLC player (Windows, Mac, Linux, and Mobile versions available). Allowed file types are: ogv, mpeg, m2ts, mov, qt, mp4, 3gp, m1v, rm, f4p, mpv, mpg, mp4, 3gpp, mp4, flv, mp4, swf, divx, mp4, vob, mxf, mkv, mod, mp4, avi, wtv, 3g2, webm, mp4, rmvb, xvid, m4v, dvr-ms, mp4, ts, asf, f4v, mts, wmv

There are two main methods to compress a video. You can either optimize the bitrate or resize the video to a smaller size. We provide 4 settings related to both methods. Here’s an explanation:

1. By Video Quality

CRF (Constant Rate Factor): CRF method attempts to keep a constant perceived video quality. To do that, it uses different compression levels on different frames. For the H264 encoder, possible CRF values range from 0 to 51. Higher values mean more compression (reduced file size), lower values mean better quality (but bigger file size). The default is set at 23.

Preset: Presets refers to the video compression speed. Choosing a slower preset allows better optimization (lower bitrate/file size) for a given video quality level. If you prefer a lower file size over encoding time, choose a slower preset.

2. As a Percentage of the Original Size (Default)

This method allows you to set a target file size for your video as a percentage of the original size. For example, if you set it to 60% for a 1Gb file, we will attempt to make your compressed file size 600Mb or less. 

The pros of this method are, you can achieve a certain target size. The downside is you don’t know how the target size will affect video quality. To overcome this, start with a decent size (as a percentage of original), then test for video quality. Increase the target size if you need better quality. This is the default video compression method used.

3. Set Max Bitrate

This method allows you to set the max bitrate for given video quality. The quality is set by CRF (constant rate factor). Select this method if you are using the video in a streaming application where you want to control the streaming bandwidth rate. To choose this option, select "By Max Bitrate" from the "Video Compress" dropdown. For more info: read video bitrate control.

4: Make Video Size Smaller (Re-Size)

Choosing a smaller video resolution (dimensions) can also save file size. For example, if you have a 4K (4320p) video but your target device is 1080p, you can downsize the video to fit 1080p and save file size. To choose this option, choose "Re-size video" from "Advanced Settings" above.

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