M2TS Converter

How to Convert M2TS to Any Format

1. Upload Your M2TS File: Drag and drop your clip or click "Add Files". The converter also accepts .mts — the same AVCHD data with the camcorder-side extension. Batch is supported, so you can drop in a whole folder of camcorder clips and each one converts in parallel.
2. Pick an Output Format and Quality Preset: Choose the target container — MP4, MOV, MKV, WebM, AVI, WMV, M4V, MPEG, and 25+ more — or extract the audio to MP3. The default Quality Preset is "Very High (Recommended)". Switch to Specific file size to cap output at an exact MB target, Constant Bitrate for predictable sizes, Variable Bitrate for smaller files at equal quality, or Constant Quality for perceptual fine-tuning.
3. Resize, Trim, or Change Codec (Optional): Under Video resolution, keep original (AVCHD is usually 1080i/1080p) or pick a Preset Resolution down to 720p/480p for smaller files. Under Trim, choose Time Range and enter a start and duration to drop dead footage. Advanced users can override the Video Codec (H.264, H.265, VP9, AV1, MPEG-4) and Audio Codec (AAC, MP3, AC3, Opus).
4. Convert and Download: Click Convert. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared.

Popular M2TS Conversions

• M2TS to MP4 — the universal target; plays on phones, browsers, TVs, and every editor
• M2TS to MOV — import camcorder footage cleanly into Final Cut Pro and iMovie
• M2TS to MKV — keep multiple audio tracks and subtitles for a media-server library
• M2TS to AVI — feed legacy Windows editors that reject transport-stream files
• M2TS to WebM — smaller, royalty-free clips for an HTML5 web embed
• M2TS to WMV — older Windows Media and Microsoft workflows
• M2TS to MPEG — broad compatibility with DVD-era players and authoring tools
• M2TS to MP3 — pull just the audio out of a recording

Why Convert an M2TS File?

M2TS is the container Blu-ray discs and AVCHD camcorders use to store high-definition video. Technically it is a modification of the MPEG-2 Transport Stream specification (ITU-T H.222.0 / ISO/IEC 13818-1) adapted for random-access media — the same scheme broadcasters use, repackaged so a disc or memory card can seek instantly. The AVCHD format that puts these files on Sony and Panasonic camcorders was announced jointly by the two companies in May 2006, and it wraps H.264/AVC video with Dolby AC-3 or uncompressed LPCM audio at up to 24 Mbit/s (28 Mbit/s for AVCHD Progressive).

The catch is that almost nothing outside a Blu-ray player or dedicated camcorder software opens an .m2ts file comfortably. The streams inside are modern and high quality, but the transport-stream wrapper is the wrong shape for general playback and editing. Converting re-wraps — or where needed re-encodes — those streams into a container the target actually speaks. The common reasons people convert away from M2TS:

• General playback — Phones, browsers, smart TVs, and the Windows/macOS default players don't reliably open .m2ts. Converting to MP4 produces a file that plays essentially everywhere with no extra software.
• Editing — Many editors stall on raw transport streams. MP4 imports cleanly into most NLEs, and MOV is the natural target for Final Cut Pro and iMovie on a Mac.
• Smaller files — AVCHD records at a high bitrate, so an hour of footage is large. Re-encoding to H.265 or AV1, or downscaling 1080p to 720p, shrinks clips substantially for sharing or storage.
• Archiving with subtitles or multiple audio tracks — MKV holds unlimited audio and subtitle tracks in one file, which suits a Plex or Jellyfin library built from old camcorder recordings.

M2TS Format at a Glance

Frequently Asked Questions

Is converting M2TS to MP4 lossless?

It can be. AVCHD M2TS files already contain H.264/AVC video, which is exactly what an MP4 carries natively, so xconvert re-wraps the existing compressed stream into the MP4 container without re-encoding — a container remux, near-instant and with zero generational loss. Re-encoding only kicks in if you change the codec, resolution, bitrate, or quality preset. If the source uses LPCM audio that you want as AAC, only the audio is re-encoded while the video stays untouched.

What is the difference between M2TS and MTS?

They are the same AVCHD data; only the extension differs by source. According to Sony, a camcorder writes the recording as .mts, and the file is renamed to .m2ts when it is imported to a computer (or when it lives on a Blu-ray disc). You can rename one to the other and it still plays. This converter accepts both, so it makes no difference which one you upload.

What opens an M2TS file without converting it?

VLC and MPC-HC play .m2ts directly on Windows, macOS, and Linux, and dedicated camcorder software (Sony PlayMemories Home, Panasonic's tools) handles them. Blu-ray player software opens disc-sourced M2TS. What generally won't open them are mobile photo apps, web browsers, and the stock Windows and macOS players — which is the usual reason to convert to MP4.

Will I lose quality going from M2TS to MP4 or MOV?

For MP4 and MOV the answer is usually no, because both containers natively hold the H.264 video already inside an AVCHD file, so the conversion is a remux that copies the stream verbatim. You only introduce loss if you deliberately re-encode — to shrink the file with H.265, to downscale the resolution, or to hit a Specific file size target. In our testing, a 60-second 1080p AVCHD clip remuxed to MP4 finished in a couple of seconds and matched the source byte-for-byte on the video track.

Which output should I pick for editing camcorder footage?

For a Mac, convert to MOV — Final Cut Pro and iMovie import it without the transport-stream stumble. For Windows and cross-platform editors, MP4 is the safest import. If your editor still struggles with long-GOP H.264 during scrubbing, transcode to a higher-bitrate intermediate, but for most assembly and trimming a straight remux to MP4 or MOV is enough. If you only need to extract audio from a recording, target M2TS to MP3 instead.

How do I shrink a large AVCHD recording?

AVCHD's high bitrate makes clips bulky, so you have two levers. Switch the mode to Specific file size and enter a target in MB to let the encoder auto-tune the bitrate, or combine downscaling (1080p to 720p) with the H.265 codec, which is roughly 40-50% smaller than H.264 at equal quality. Trimming dead footage first is the highest-leverage step on long recordings. To shrink without changing format, the dedicated video compressor is the most direct route.

Is my M2TS file uploaded to a server?

Yes — conversion runs on our servers, not in your browser. Your file is uploaded over an encrypted (TLS) connection, processed, and then deleted automatically after a few hours. There's no sign-up and no watermark, and files are never shared or made public. The practical limit on a very large AVCHD recording is upload time and connection speed, not a fixed per-file cap.