Compress a Video Online
Shrink your video file size without losing quality, free and with nothing to install. Everything runs entirely in your browser, so your file is never sent to a server.
Drag and drop a video here, or click to choose a file
MP4, MOV, WebM, MKV, AVI — up to 500 MB. Nothing is sent to a server.
Compression level
Why compress a video in the browser?
Unlike traditional online compressors, nothing is uploaded: the video is processed locally by your browser. It's faster, more private, and there's no server-imposed rate limit.
Perfect for shrinking a video before emailing it, posting it on social media, or storing it — without sacrificing visible quality.
Frequently asked questions
Are my files uploaded to a server?
No. Compression runs entirely in your browser thanks to ffmpeg.wasm. Your video never leaves your device, which guarantees complete privacy.
Which formats are supported?
The most common formats are accepted: MP4, MOV, WebM, MKV and AVI. The output is an MP4 (H.264) file that plays everywhere.
Is there a size limit?
The tool works best up to around 500 MB. Beyond that, compression is still possible but depends on the memory available on your device.
Is the tool really free?
Yes, video compression is completely free with no sign-up. Voxdub also offers a dubbing and rythmo band studio, with a 7-day free trial.
Need to dub or subtitle this video?
Voxdub is an online dubbing and rythmo band studio. Import your video, generate subtitles, dub into multiple languages.
Try Voxdub for free7-day free trial · no install · rated 4.5/5 on Google