MTS to MP4 Converter – Free, Fast & Private
Convert AVCHD camcorder MTS/M2TS files to MP4 locally in your browser — your video never leaves your device
How to convert MTS to MP4
Choose or drag in your MTS 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 MTS to MP4 conversion
MTS and M2TS are the AVCHD files written by Sony, Panasonic and Canon camcorders (the STREAM folder on the memory card). They hold ordinary H.264 video in an MPEG transport stream, which phones, editors and web players refuse to open. This tool moves that stream into a standard MP4 container without re-encoding — no quality loss, and a multi-gigabyte recording finishes in seconds.
Frequently asked questions
Yes for almost every AVCHD recording: the H.264 video is copied into MP4 unchanged, so the picture is identical to the original and the conversion takes seconds, not minutes. AC-3 (Dolby Digital) camcorder audio is converted to AAC so the MP4 plays everywhere.
Nothing that matters here — the camcorder writes .MTS and some software renames the same files to .M2TS when copying them to a computer. Both are AVCHD transport streams and convert to MP4 the same way.
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.