Free Online Video Format Converter
Convert MP4, MOV, MKV, AVI, WebM and more to any target format in seconds. Runs in your browser via WebAssembly — no upload, no watermark, no signup.
Features
Convert to Any Major Format
MP4, WebM, MOV and MKV — all the formats that matter for sharing, editing, and device playback. One tool covers every workflow.
MP4 for Universal Playback
H.264 + AAC inside MP4 — the safest pick for YouTube, social platforms, Slack, and every modern device.
WebM for the Open Web
VP9 + Opus inside WebM — smaller files at comparable quality, perfect for embedding on your own site.
MOV / MKV for Editing & Archive
MOV slots straight into Final Cut and iMovie. MKV preserves multi-track audio for archival purposes.
Quality Preserved
Smart codec choices per target format keep the visual quality intact. No visible degradation, no frames dropped.
CRF 23 H.264 / VP9 Defaults
Re-encoded with a high-quality CRF so the output is visually indistinguishable from the source.
AAC / Opus Audio Encoding
Audio is encoded with the codec each container expects, or copied losslessly when the source is already compatible.
Faststart MP4
MP4 output has the moov atom at the front, so it starts playing instantly when shared online.
100% Private & Free
Your footage never leaves your device — everything runs in the browser tab using WebAssembly.
Zero Server Upload
Files are read, converted, and written back entirely on your own machine.
No Watermark
The exported video is clean — no logo, no stamp, no branding overlay.
Works Everywhere
Any modern browser — desktop or mobile. Chrome, Firefox, Safari, Edge.
Loved by creators, students & researchers
Why people use BibiGPT to turn videos into text every day.
Trusted by 50,000+ users worldwide
“I paste a link and get clean captions in seconds — it saves me hours of retyping every single week.”
Maya R.
Content Creator · Repurposes short videos
“Exporting the transcript lets me review new words at my own pace instead of pausing the video constantly.”
Daniel K.
Language Learner · Studies with real videos
“Accurate, timestamped text I can quote directly. It has quietly become part of my daily workflow.”
Priya S.
Researcher · Cites public talks
FAQ'S
Frequently Asked Questions
Ask us anything!
Convert Your Video Now
Free, private, and instant. No signup, no upload, no watermark — just drop a file, pick a format, and get the converted version back in seconds.