Compress Video to 20MB
20MB is Microsoft Outlook's default attachment limit and the cap for most corporate email systems. If you need to email a video to a colleague or client, 20MB is the safe target that works across Exchange, Outlook.com, and most enterprise setups. CompressYourVideo.com compresses your video to 19MB (safe margin) while maximizing quality for the given duration. A 3-minute video fits at 720p with good clarity. This target also works well for Slack's free tier and older messaging platforms. For Gmail users, consider the 25MB target instead since Gmail allows slightly larger attachments.
Where do you want to share your video?
Why compress video to 20 MB?
A 20 MB target matches a common sharing limit. Unlike a blunt percentage reduction, our tool calculates the bitrate math specifically for hitting 20 MB: total budget in kilobits, minus the audio track, divided by duration. That means a 30-second clip keeps more resolution than a 10-minute clip at the same target, which is how it should be.
With CompressYourVideo.com, just select your target size, upload your video, and download the compressed version in seconds. No signup required.
How video compression to 20 MB works
When you compress a video to 20 MB, the tool analyzes your video's duration, resolution, and content complexity to calculate the optimal bitrate. The bitrate is the amount of data used per second of video. A lower bitrate means a smaller file, but also lower visual quality.
For a moderate target like 20 MB, the process involves: (1) analyzing your video's duration to calculate the maximum bitrate that fits, (2) scaling resolution down if the bitrate is too low for the original resolution (e.g., 1080p to 720p), and (3) encoding with optimized settings that prioritize visual clarity over mathematical perfection.
Default output is MP4 with H.264 video and AAC audio: the most universally compatible format, plays inline on every device, browser, and messaging app. Need MOV, MKV, or WebM instead? Switch in Advanced settings.
Tips for best results at 20 MB
- Trim first: Shorter videos get more bitrate per second, which means better quality at the same file size
- Good lighting helps: Well-lit footage compresses more efficiently than dark or grainy video
- Avoid text overlays: Small text and fine details are the first things to degrade during compression
- Keep it under 2 minutes: For targets under 25 MB, videos over 2 minutes will show noticeable quality reduction