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Compress Video

Convert Video files to Compressed Video instantly and privately. File Transmute runs entirely in your browser, so your Video is never uploaded to any server.

No upload Instant Free

Reviewed by Ismail Sab Ajnalkar · Updated July 2026

Runs in your browser via WebAssembly — your media is never uploaded. The FFmpeg engine (~30MB) downloads once on first use, so the first conversion takes a little longer.
Privacy, proven — live
Online
0 BUploaded to our servers
0Requests carrying your data
0Files stored by us
—Processed on your devicedrop a file
Conversions run entirely in your browser. Turn off your Wi-Fi and try it — it still works. Nothing leaves this device.

Make a video file smaller for email or the web. File Transmute re-encodes it with H.264 at an efficient bitrate using FFmpeg compiled to WebAssembly — all on your device, nothing uploaded.

Best for

  • Shrinking a video to fit an email or messaging size limit
  • Reducing a clip for a school or work upload portal
  • Saving storage or bandwidth on a long recording

Good to know

Reduces video file size by re-encoding at a lower bitrate/resolution — a smaller file at slightly lower quality. It runs on your device via FFmpeg (WebAssembly, ~30 MB), which downloads once on first use and is then cached. Large or long videos are limited by your device's memory, so very big files may be slow or need trimming first.

How to convert Video → Compressed Video

01

Drop your Video file into the converter above — it stays on your device.

02

Choose Compressed Video as the output. File Transmute picks the smartest settings automatically.

03

Click Convert and download your Compressed Video file instantly.

Frequently asked questions

It depends on the source and settings, but screen-quality output can shrink a video substantially — often enough to clear a 25 MB email limit. Higher compression means a smaller file and more visible quality loss.

Some, yes — compression re-encodes the video at a lower bitrate. For watching on a phone or sharing, it's usually barely noticeable; keep the original if you're archiving.

No. Compression runs in your browser with FFmpeg, so the video never leaves your device — it even works offline once the page has loaded.

The ~30 MB FFmpeg engine downloads once on first use, then is cached, so later conversions start quickly.

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Use this nextMP4 → MP3

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