MTS to MOV Converter
FileFlip converts MTS to MOV entirely inside your browser, using WebCodecs and FFmpeg compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert an MTS file to MOV?#
- Drop your MTS file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to MOV and the conversion starts on its own. FileFlip usually downloads nothing, falling back to 30.8 MB of WebAssembly if your browser cannot encode these codecs itself, then runs WebCodecs and FFmpeg on your own machine.
- Save the MOV file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting MTS to MOV lose quality?#
Sometimes. When the codecs inside the MTS file are ones the MOV container can hold, the streams are copied straight across and nothing at all is lost. When they are not, the file has to be decoded and encoded again, and that step does cost a little quality.
Is it safe to convert MTS files online?#
Yes, because nothing is uploaded. FileFlip converts MTS files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What MTS to MOV actually does to the file#
Converting MTS to MOV runs on WebCodecs and FFmpeg, usually downloads nothing, falling back to 30.8 MB of WebAssembly if your browser cannot encode these codecs itself, copies the streams through when the codecs fit and re-encodes when they do not.
| Engine | WebCodecs and FFmpeg |
|---|---|
| Conversion path | One step: MTS → MOV |
| Downloaded to your browser | Nothing in most browsers, or 30.8 MB if yours cannot encode these codecs itself |
| Quality | Lossless when the codecs fit, lossy when they do not |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Encoded streams | Sometimes | Survives for some files and not others. |
Worth knowing before you start:
- the FFmpeg fallback is an LGPL build, so a re-encode produces MPEG-4 Part 2, VP8, VP9, or Theora rather than H.264 or H.265
- whether the browser can do this without FFmpeg depends on the codecs it exposes through WebCodecs
- the encoded streams are copied when the file's codecs fit the target container, and re-encoded when they do not
What is an MTS file?#
An MTS file holds the same BDAV MPEG-2 transport stream as M2TS, written under the extension the AVCHD standard assigns to footage recorded straight onto a camcorder's memory card.
Keep footage as MTS straight off a camcorder while it's only being copied or archived, since re-encoding at that stage only costs quality for no benefit.
Convert MTS to MP4 before editing or sharing camcorder footage, since most editors and every modern device handle MP4 more smoothly than the camcorder's native transport stream.
What is a MOV file?#
A MOV file holds video, audio, text and timecode as separate tracks in Apple's QuickTime container, the 1991 format whose structure MPEG later adopted as the basis for MP4.
Keep footage as MOV while it is still being edited, especially ProRes, where the point is fast scrubbing and repeated re-encoding would cost quality.
Convert MOV to MP4 once the video is finished and needs to be shared, uploaded or played on Windows and Android.
MTS to MOV questions people ask#
What produces an MTS file?
MTS files come off consumer and prosumer camcorders recording in the AVCHD format, made by Sony, Panasonic, Canon, and others since 2006. The camera writes each clip into the memory card's AVCHD folder structure with the .MTS extension.
Why won't my MTS file import into my video editor?
Some editors read the AVCHD folder structure a camcorder card uses but choke on an MTS file copied out on its own, and others simply don't ship the H.264 decoder settings AVCHD needs. Copying the whole camera folder in through the editor's dedicated camera-import feature, or converting the MTS to MP4 first, usually clears it up.
What's the difference between MTS and M2TS?
Nothing in the stream itself. Both are the same BDAV MPEG-2 transport stream; MTS is the extension the AVCHD camcorder standard uses for footage on a memory card, while M2TS is the extension Blu-ray Disc authoring and playback software uses for the same structure once it's on a disc.
What should I convert MTS to?
Convert MTS to MP4 for editing and playback outside camcorder-specific software. It carries the same H.264 video without the AVCHD packaging that trips up general-purpose editors and players.