Add your MKV file
Drop one or more .mkv files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
MKV to MTS
Pulling the soundtrack out of a .mkv video into .mts audio keeps what you can hear and drops the picture entirely. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop MKV files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting Matroska video to AVCHD video
Pulling the soundtrack out of a .mkv video into .mts audio keeps what you can hear and drops the picture entirely. An .mkv file uses the Matroska container, an open format designed to hold an unlimited number of video, audio, and subtitle tracks in one file. Collectors of high-quality rips and archival copies favor .mkv because it keeps every language track, chapter marker, and font attachment together.
An .mts file is AVCHD footage as written to a camcorder's memory card, containing H.264 video inside an MPEG transport stream. Sony and Panasonic camcorders from the late 2000s onward filled SD cards with .mts clips, so the extension is familiar to anyone importing family or event video. For this route the practical draw is the transport-stream base survives card errors and interrupted recordings well and h.264 essence is often modern enough to re-wrap without re-encoding — balanced against transport-stream packet overhead makes files larger than the same video in MP4, which is worth knowing before you commit a large batch.
Why convert MKV to MTS?
The usual reason to take .mts audio out of a .mkv file is that only the sound matters — a talk, interview, song, or podcast segment. Keeping the video stream would waste storage, and a dedicated audio file is easier to trim, tag, and play. On the source side, safari and iOS refuse the container outright; on the target side, the payoff is the transport-stream base survives card errors and interrupted recordings well, which is exactly what you want for importing camcorder footage into Premiere, Resolve, or Final Cut.
MKV vs MTS at a glance
| Aspect | Matroska video (.mkv) | AVCHD video (.mts) |
|---|---|---|
| Format type | Container — quality depends on the codecs and settings inside | Container — quality depends on the codecs and settings inside |
| How it stores data | built on EBML, a binary XML-like structure that lets the container gain features without breaking older parsers | uses 192-byte transport packets, standard 188-byte packets plus a 4-byte arrival timestamp, matching Blu-ray's BDAV layout |
| Strongest at | archiving discs while preserving every audio track and subtitle stream | importing camcorder footage into Premiere, Resolve, or Final Cut |
| Weak spot | safari and iOS refuse the container outright | transport-stream packet overhead makes files larger than the same video in MP4 |
| Metadata | matroska tags cover title, cast, and arbitrary key-value pairs, and the container can embed cover art and other files as attachments | recording date, camera settings, and GPS coordinates on some models are stored in the AVCHD folder's clip-info files rather than in the .mts stream itself |
Pick MTS as the output
Select .mts in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if MTS is selectable, the route is real and validated.
Convert on your device
Press Convert. A WebAssembly FFmpeg build demuxes the audio track and re-encodes it locally; the video stream is simply discarded.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid MTS file. Outputs keep the original filename with the .mts extension.
MKV to MTS questions, answered
Will converting MKV to MTS lose quality?
Since mkv is container-oriented and mts is container-oriented, the conversion preserves the source content exactly as stored; no additional compression pass is applied beyond what .mts itself requires.
Is it private to convert MKV files here?
Yes — the .mkv file is processed inside your browser tab and never uploaded. A WebAssembly FFmpeg build demuxes the audio track and re-encodes it locally; the video stream is simply discarded. Close the tab and the file is gone from memory.
Where will the MTS file work?
Editing suites and VLC handle .mts directly, while browsers, phones, and many TVs fail to recognize the extension even though they could decode the H.264 inside. Re-wrapping to MP4 usually restores playback everywhere without touching quality.
Will the MTS file be bigger or smaller than my MKV?
Much smaller — the video stream is usually 80–95% of a .mkv file's weight, and it is discarded entirely. The remaining audio is re-encoded at the bitrate implied by your quality setting.
What happens to the metadata in my MKV file?
This converter strips container metadata deliberately (the FFmpeg command runs with metadata mapping disabled) so exported files do not leak recording details. In the source, matroska tags cover title, cast, and arbitrary key-value pairs, and the container can embed cover art and other files as attachments; none of it is transmitted anywhere because the file never leaves your browser.
Can I convert MTS back to MKV?
Yes — the reverse route exists as a separate tool. Bear in mind that round-tripping .mkv → .mts → .mkv is not a perfect undo when any lossy step is involved; keep your original if fidelity matters.