No—ffmpeg.wasm runs entirely in your browser.

Common types like MP4, WebM, MOV—depends on browser/ffmpeg support.

~23 keeps quality; 28–32 smaller for sharing. Re-run if needed.

Transcoding is heavy—longer/higher-res takes more time. Use desktop Chrome/Edge.

Usually synced; bad sources or low memory may glitch—try shorter clips or lower resolution.

Try Video to MP4, Trim, to GIF, or Extract Audio.

Video Compress

Reduce resolution and bitrate to shrink video size—local ffmpeg.wasm transcoding, nothing uploaded.

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How to use & FAQ

Phone clips and screen recordings are often too large to share. Re-encode in-browser with ffmpeg.wasm—lower height and raise CRF to cut size.

Higher CRF = smaller file, lower quality (often 23–32). Local-only but CPU-heavy; allow time for progress to finish.

Video uploaded?: No—ffmpeg.wasm runs entirely in your browser.
Supported formats?: Common types like MP4, WebM, MOV—depends on browser/ffmpeg support.
CRF value?: ~23 keeps quality; 28–32 smaller for sharing. Re-run if needed.
Why so slow?: Transcoding is heavy—longer/higher-res takes more time. Use desktop Chrome/Edge.
Audio sync issues?: Usually synced; bad sources or low memory may glitch—try shorter clips or lower resolution.
Other video tools?: Try Video to MP4, Trim, to GIF, or Extract Audio.