Convert MTS files to FLAC free in your browser — no signup, no install, and the file is never uploaded to a server. FLAC keeps full quality with no further loss.
Add your MTS file
Drag the MTS file onto the drop area above, or click it to pick a file from your device. You can add several files at once.
Confirm FLAC as the output
FLAC is already selected as the output format on this page. You can pick the bitrate — higher keeps more of the sound, lower makes a smaller file.
Run the conversion
Press the convert button. Video is re-encoded frame by frame on your own machine, so a long clip can take several minutes. The tab has to stay open.
Download the FLAC file
When it finishes, download the FLAC file. Converting multiple files gives you the option to download them together as a ZIP.
The file Sony and Panasonic camcorders record under the AVCHD standard. Some editing programs cannot read it directly, creating conversion demand.
A lossless format that preserves 100% of the original quality while roughly halving the size of a WAV. It is the standard among audiophiles.
Yes. MTS to FLAC conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.
No. The conversion runs entirely inside your browser using WebAssembly, so the MTS file never leaves your device. That is also why it works without an internet connection once the page has loaded.
Yes — FLAC is an audio format, so only the soundtrack is extracted. The video track is dropped, which is usually the point when you want just the audio.
The free plan handles files up to 200MB. Because processing happens on your own device, very large files depend on your computer's memory rather than a server quota.
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What each file format is, what it is used for, and which formats it can be converted to.
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