Video Compressor — Reduce Video File Size Online Free
Make a video file smaller by re-encoding it at a lower bitrate. Pick a quality level, compress, and download the result. Everything runs in your browser — your video never leaves your device.
MP4, WebM, MOV and other formats your browser can play. Large files take longer — compression runs in real time.
Lower bitrate means a smaller file but softer picture quality. Output is always WebM (VP8 video + Opus audio), the format browsers can record.
Your result will appear here
Compressed video
Output format: WebM (VP8 + Opus). WebM plays in Chrome, Firefox, Edge and most modern players.
How to use
- Choose a video file from your device — it stays in your browser and is never uploaded.
- Pick a quality level: Low for the smallest file, Medium for a good balance, or High to stay close to the original.
- Click Compress video and wait for it to finish, then download the WebM file.
Frequently asked questions
Why is the output a WebM file and not MP4?
Browsers can only record video as WebM through the built-in MediaRecorder — there is no MP4 encoder in the browser. WebM plays in Chrome, Firefox, Edge and Safari 14.1+, and free tools like VLC can convert it to MP4 if you need that format.
Will compressing make my video look worse?
Yes, a little — compression works by throwing away detail. Low quality is best for quick sharing where size matters most; High keeps the picture close to the original while still trimming the file.
Is my video uploaded anywhere?
No. The video is read and re-encoded entirely on your device. Nothing is sent to a server, and closing the page deletes everything.
How long does compression take?
About the same as the video's length — the video has to play through once while it is re-recorded. A 1-minute video takes roughly 1 minute, plus a few seconds to prepare the download. Use it as a free video compressor online — no signup, nothing to install.
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