Convert M2TS and MTS to MP4 without uploading the footage

AVCHD camcorders from Sony, Panasonic, Canon and JVC save footage as .m2ts or .mts — often many gigabytes per card. OpenConvertVideo converts it right in your browser, so it starts the moment you pick the file and your footage never leaves your device.

Drop a file here, or click to choose

Converts right here — nothing uploads

Need trim, resize, or quality controls? Open the full converter →
  • No upload wait
  • Nothing leaves your device
  • Free, no account
  • No artificial size limits

One format, two file names

AVCHD is the recording format behind most consumer HD camcorders. On the memory card itself, clips are usually named .MTS, sitting inside a folder path like PRIVATE/AVCHD/BDMV/STREAM. Copy that footage off through the camera's software, or onto a Blu-ray disc, and the same H.264-in-transport-stream video often gets renamed .m2ts. They're the same format wearing two different extensions.

Why it's buried in a folder you can't find

Camcorders don't hand you a single video file — they hand you a nested folder structure designed for the camera and Blu-ray players to navigate, not for people. Drag the whole card into Windows or a phone and you'll often find nothing plays, or you find the clips but they're numbered meaninglessly and won't import into an editor without help.

50i and 60i: the interlacing nobody warned you about

A lot of AVCHD footage — especially from older camcorders left on their default setting — was recorded interlaced, at 50i or 60i. Play it back on the wrong software and you'll see combing artifacts on anything that moves. Converting to MP4 re-encodes the footage progressively, so fast motion in kids' sports games or a wedding dance floor stops tearing.

No upload wait for a full memory card

A single AVCHD clip can run to several gigabytes, and a full event might be a dozen of them. There's no size limit here and no upload step to wait through — conversion happens locally on your own device the moment you pick a file (we just supply the code; your processor does the work), which is the difference that matters when you're converting an entire card, not just one clip. Every gigabyte of it stays 100% private, as it should.

From camcorder folder to a single shareable file

  • H.264 (or H.265, for roughly half the size) video in an MP4 container, with AAC audio.
  • Full resolution and frame rate preserved, deinterlaced where needed.
  • Plays natively on iPhone, Android, Windows, Mac and smart TVs.
  • Imports cleanly into Premiere, Final Cut, DaVinci Resolve and CapCut — no more mystery folder structure.

Frequently asked questions

What's the difference between M2TS and MTS?
None in terms of the video itself — both hold H.264 wrapped in an AVCHD transport stream. MTS is typically what you see directly on a camcorder's memory card; M2TS is the same footage once it's copied into an AVCHD or BDMV folder structure, or authored onto a Blu-ray disc.
Why won't my camcorder footage play on my phone or laptop?
AVCHD was designed for camcorders and Blu-ray players, not everyday playback. Most phones, default media players, and lightweight apps don't recognize .m2ts or .mts, and the files themselves are usually nested inside a PRIVATE/AVCHD/BDMV folder rather than sitting on their own. Converting to MP4 gives you a normal, standalone file.
My AVCHD footage looks jagged or combed during motion — why?
Your camcorder likely recorded in an interlaced mode (50i or 60i), which stores each frame as two interleaved half-frames. Some players and editors don't handle that correctly, producing visible combing on fast movement. Converting to MP4 re-encodes the video progressively, which removes the effect.
How do I convert a full memory card of AVCHD clips?
Convert each .m2ts or .mts file individually — choose it in the converter, set the output to MP4, and convert. Because everything runs in your browser with no upload step, there's no size limit to worry about, even if the card holds several gigabytes across many clips.
Is converting AVCHD footage private?
Yes. Your footage is decoded and re-encoded entirely on your device using WebAssembly ffmpeg — it's never uploaded anywhere. That matters for camcorder footage of family events, kids, or anything else you'd rather not hand to a random upload-based converter site.

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