100% Free & Private Online Tool

Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss

Video files are the largest files most people regularly work with - and every platform has upload limits. Email caps at 25MB. WhatsApp limits to 64MB. Slack to 100MB. Instagram to 300MB. FastCompressor re-encodes your video using H.264 or H.265 compression with optimised quality settings, targeting exactly the file size you need - without watermarks, without subscriptions, without uploading your footage to anyone's server.

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Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss FAQ

Common questions about using our free compress video online - reduce mp4, mov & webm size without quality loss tool.

MP4 (H.264/H.265), MOV (QuickTime), WebM (VP8/VP9), and AVI. Output is always MP4 for maximum compatibility.

Re-encoding always involves some quality trade-off. At quality settings above 70%, most viewers cannot detect a difference on standard screens. FastCompressor previews the result before you commit.

Yes - FastCompressor never adds watermarks on any tier. Free users get the browser tool; Pro users get the desktop app with batch processing and higher quality presets.

It depends on the content. High-motion footage (sports, action) compresses less than static content (screencasts, talking head recordings). A 200MB screencap typically reaches 15-25MB at quality 75.

No. The browser tool processes video using WebAssembly in your browser. The desktop app is fully offline. Your footage never leaves your device.

Compressing more than
a handful of files?

The online tool is great for quick one-offs. For bulk batches, folder watch mode, and full privacy — the desktop app is built for that. Free to try. $19 once to go unlimited.

Get Pro — $19 once Try Free First →

macOS, Windows & Linux · No subscription

Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss

Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss

Drag & Drop Files Here

Tool Options

Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss FAQ

Compressing more than a handful of files?

Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss

Drag & Drop Files Here

Tool Options

Compress Video Online - Reduce MP4, MOV & WebM Size Without Quality Loss FAQ

Compressing more than a handful of files?

Compressing more than
a handful of files?

Compressing more than
a handful of files?