Free Online Video Converter – Fast & Private
Convert MOV, MKV, AVI, WebM, WMV and more to MP4 locally in your browser — your video never leaves your device
How to convert video to MP4
Choose or drag in your video file — nothing is uploaded, it stays on your device.
Click Start Converting — H.264 sources are rewrapped losslessly in seconds; other codecs are re-encoded to MP4 (H.264/AAC).
Download your standard MP4 file.
About video to MP4 conversion
Drop in almost any video and get back a standard MP4 that plays everywhere. Unlike other online converters there is no upload: the conversion runs in your own browser with WebAssembly FFmpeg, so a multi-gigabyte file starts converting instantly.
Videos that already contain H.264 are rewrapped without re-encoding (lossless, seconds). Everything else — HEVC, VP8/VP9, AV1, MPEG-4, WMV and more — is re-encoded to H.264 with AAC audio for maximum compatibility.
Frequently asked questions
MP4, MOV, MKV, WebM, AVI and WMV containers, with H.264, HEVC, VP8, VP9, AV1, MPEG-2, MPEG-4 and WMV/VC-1 video. Output is always MP4 (H.264/AAC).
Not yet — output is always MP4 with H.264 video and AAC audio, because that combination plays on effectively every device and platform. If you need a smaller file rather than a different format, use the video compressor instead.
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your file never leaves your device — that is also why there is no upload wait, no queue and no file-size pricing.
Up to 8GB on desktop browsers and 2GB on mobile. There is no limit on the number of files you convert, and no signup or watermark.
Yes — completely free and unlimited, with no watermark, no signup and no daily quota. Because the conversion runs on your own device instead of our servers, there are no processing costs to charge for.
If the source already contains H.264 video, the file is rewrapped without re-encoding and finishes in seconds, even for gigabyte files. Other codecs are re-encoded in parallel WebAssembly workers, which runs at roughly real-time speed on a modern computer.
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on Windows, macOS, ChromeOS, Linux, iOS and Android. There is nothing to install.
AAC and MP3 audio is copied over unchanged. Other audio codecs (PCM from cameras, Vorbis, Opus…) are converted to AAC so the resulting MP4 plays everywhere.