FLV to MP4
Convert FLV to MP4 for free, entirely in your browser. No uploads, no accounts, no file size limits.
Frequently asked questions
Is it safe to convert FLV to MP4 here?
Yes — the conversion runs entirely in your browser using ffmpeg compiled to WebAssembly. Your file is never uploaded to a server.
Will I lose quality converting to MP4?
MP4 uses lossy compression, so there's a small quality trade-off in exchange for a smaller file. Use a higher quality setting if you want to minimize it.
Is there a file size limit?
No upload limit — since everything runs locally, very large files just take longer to process depending on your device.