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Knack.bz
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File Conversion — Video
FFmpeg.wasm v0.12 (ESM core + same-origin worker, legacy API shim)
Why Local File Conversion?
Your files never leave your device—great for privacy and speed.
No sign-ups or uploads required; everything runs in your browser.
Perfect for students, small businesses, creators, and teams.
Source
Pick a file
Output
Format
MP4 (remux, fast)
WEBM (vp8/vorbis)
MP3 (audio only)
Idle
Convert
Cancel
⬇️ Download output
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