Convert Video
Convert videos between MP4, WebM, AVI, MOV, and MKV. Free browser converter built on FFmpeg.wasm — no uploads, no signup, no watermarks.
Supported Formats
MP4
Best compatibility
WebM
Web optimized
AVI
High quality uncompressed
MOV
Apple optimized
MKV
Multi-track support
How to Use
- Upload the video you want to convert (MP4, MOV, WebM, AVI, or MKV — up to 50MB per file)
- Pick the target format by destination: MP4 (H.264) for Instagram, TikTok, YouTube, WhatsApp; WebM for web embeds; MOV for Premiere or Final Cut
- Click "Convert" — processing runs entirely in your browser via FFmpeg.wasm, the file never reaches a server
- The converted video downloads automatically, ready to import into CapCut, Premiere, DaVinci Resolve, or upload directly to social networks
- For Reels, TikTok, or YouTube Shorts use MP4 H.264 at 1080×1920 vertical, 30 or 60fps, bitrate 5–10 Mbps
- Converting iPhone MOV to MP4 is essential for Windows, Android, PowerPoint, or any messenger that mangles MOV on download
All processing is done in your browser, and files are never sent to a server.
Frequently Asked Questions
Supported input and output formats include MP4, WebM, AVI, MOV, and MKV.
Yes, the maximum file size is 50MB for optimal browser performance.
Conversion time depends on file size and format. Typical conversions take 30 seconds to a few minutes.
Most failures are caused by file size or codec issues. Try: (1) use a file under 200MB, (2) if the video uses an unusual codec, convert to MP4 using another tool first, (3) refresh the page and retry. If the problem persists, the file may be corrupted or use an unsupported codec.
No. FFmpeg.wasm runs the conversion entirely in your browser, so the file never leaves your device.
Up to 50MB per file to stay within browser memory limits. For larger files, trim or compress first.
Audio is preserved by default. Embedded subtitle streams may be dropped depending on the target container — use a separate subtitle workflow if you need them.