Compress a video
Get a clip under an email or upload limit, without sending it anywhere first.
- Runs on your device — the file is never sent anywhere
- No sign-up, no watermarks, no daily quotas
- Free, with no limit on how often you use it
How it works
Almost every video compression search starts with a hard limit: an email attachment cap, a form that refuses anything over 100 MB, a chat app that will not send it. The irony of the usual fix is that you upload the oversized file to a website in order to make it smaller — which is the slowest possible way to solve a size problem.
The two things that actually shrink a video
Quality (how much detail the encoder throws away) and resolution (how many pixels there are to begin with). Dropping a 4K clip to 1080p typically saves far more than any quality setting, because you have removed three quarters of the pixels. Use resolution first, quality second.
What the quality settings mean
They set the encoder's constant rate factor. High keeps almost everything and saves the least. Balanced is the setting most people should use — the loss is hard to see at normal viewing distance. Smallest is genuinely visible and is for when a hard limit has to be met.
Already-compressed video will barely shrink
A clip exported from a phone or downloaded from a streaming site has already been compressed hard. Running it through again at a similar quality saves little and can even produce a larger file. If that happens you will be told, rather than being handed a bigger file without comment.
Audio is re-encoded too
The soundtrack is re-encoded to 96 kbps AAC, which is transparent enough for speech and ordinary music and saves meaningful space on a long clip. If the audio is the point of the file, use the audio converter instead.
Compress a video — questions
How much smaller will my video get?
It depends entirely on the source. Screen recordings and phone footage often shrink dramatically; an already-compressed download may barely change. The tool tells you if the result came out no smaller.
Does compressing lose quality?
Yes — that is how it works. The balanced setting is chosen so the loss is hard to notice at normal viewing distance.
Is my video uploaded?
No. The compression runs in your browser with ffmpeg. Nothing is transmitted.
What format do I get back?
An MP4 with H.264 video and AAC audio, which plays almost everywhere.