What formats are supported?

Input: MP4, MOV, MKV, AVI, WebM, and most common video formats. Output is always MP4 (H.264 + AAC), which plays on all devices.

How much will my video be compressed?

It depends on the original encoding and your chosen preset. Balanced typically reduces size by 40–60%. Small Size and Tiny can reduce by 70–80% with some quality loss.

Is there a file size limit?

No hard limit, but very large files (500 MB+) may be slow or fail depending on your device RAM. For best results keep input files under 300 MB.

Video Compressor Online Free — Reduce Video File Size

🔒 100% Private — Compressed in your browser using FFmpeg WebAssembly. Files never leave your device.

🎥

Drop video here or click to browse

MP4 · MOV · MKV · AVI · WebM — up to ~300 MB

Compression Preset

Resolution:

Loading FFmpeg…

— Original size

— Compressed size

— Space saved

⬇️ Download MP4

Frequently Asked Questions

Does this upload my video to a server?

No. All compression runs in your browser using WebAssembly. Your video never leaves your device — not even for a second.

Which preset should I use?

For WhatsApp or Telegram: Balanced. For email: Small Size. For archiving: High Quality. For maximum size reduction where quality matters less: Tiny.

How long does compression take?

Roughly 1–3× the video duration depending on your device and preset. A 1-minute video typically takes 1–3 minutes on a modern phone or laptop. High Quality takes longer than Tiny.

Is there a watermark on the output?

No watermark, ever. The output is a clean MP4 file with no branding added.

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