Convert AVCHD camcorder footage (.MTS/.M2TS) to MP4 locally - usually losslessly in seconds, so it plays in any device and any editor. No upload.
Running locally on your device ...
Running locally on your device ...
0%
Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
.MTS and .M2TS are the AVCHD format Sony, Panasonic and Canon consumer camcorders have recorded to since roughly 2006 - a broadcast-style transport-stream container around a picture that is almost always already H.264, with AC3 or PCM audio. Despite the modern codec, hardly any device outside camcorder software or certain Blu-ray players recognises the container itself - most editors, smartphones and web uploads expect MP4.
Because AVCHD footage is almost always already H.264, this conversion is a purely lossless, instant repackage (no picture is recomputed) in the overwhelming majority of cases - including a possible second audio track (e.g. stereo plus 5.1) that some AVCHD cameras record. Only for a rare, unusual camera encoding does the tool automatically re-encode instead of producing a broken file.
Camcorder footage is often private family video - everything therefore runs locally in the browser, with the footage never uploaded.
| Input formats | MTS, M2TS |
|---|---|
| Output format | MP4 |
| Batch processing | No |
| Processing | Locally in your browser (WebCodecs) |
| File upload | None |
Limitations: In the overwhelming majority of cases (H.264 picture, as with practically every AVCHD camcorder) this is a lossless repackage with no quality loss, including every audio track. Only for a very rare, unusual camera codec does the tool automatically re-encode. One file per run, ~1 GB limit (4 GB/tab in the browser).
No, the entire conversion happens locally in your browser.
Practically none for this tool - both are the same AVCHD format with a different file extension depending on the camera manufacturer.
The MTS/M2TS container is barely recognised outside camcorder software and some Blu-ray players, even though the video codec inside is often already H.264 - MP4 fixes that.
In the usual case, no - a pure lossless repackage, byte-identical picture.
Yes, during the lossless repackage every audio track is copied along.