MKV → M4V
Convert MKV video to M4V entirely in your browser — no upload, no watermark, no sign-up.
Drop files here
or browse from your device
images · audio · video · documents · archives · up to ~500MB
Your first conversion lands here automatically — saved on this device only, never uploaded.
100% Private
Runs in your browser. No upload.
Instant
No queue, no server roundtrip.
Offline-ready
Works after first load.
Re-wrapping MKV footage as M4V is what makes it playable and editable outside the device or era it came from, without re-shooting anything. M4V (Apple MPEG-4 video) earns its place here: native playback across iPhone, iPad, Mac and Apple TV. MKV is an open container that can hold almost any codec plus multiple audio tracks, subtitles and chapters. Enthusiasts love it; browsers, phones and TVs frequently refuse it.
MKV is an open container that can hold almost any codec plus multiple audio tracks, subtitles and chapters. Enthusiasts love it; browsers, phones and TVs frequently refuse it.
Picture and sound are re-encoded into the M4V container at a bitrate chosen to keep the result visually close to the MKV source. Resolution, frame rate and duration are preserved; file size usually changes noticeably because MKV and M4V lean on different codecs. Multiple audio tracks or chapter data may not carry over.
What you gain with M4V: Native playback across iPhone, iPad, Mac and Apple TV.
Drop your MKV file above and Morphio decodes it locally, then re-encodes it as M4V using WebAssembly + the browser's native codecs. Nothing is ever uploaded — your files stay on your device. Batch as many files as your machine can handle. See exactly how in-browser conversion works.
Open the MKV to M4V page, drop your video on the drop zone and press convert. Morphio runs an FFmpeg build compiled to WebAssembly that runs inside the page, so the MKV data never leaves your device and no server ever receives a copy.
Audio and video tracks are re-encoded together, so the result stays in sync and plays on standard players. Converting MKV to M4V only rewrites the container and encoding you asked for — the source file on your disk is never modified.
Yes. The free plan covers 10 conversions a day with files up to 200 MB and adds no watermark or sign-up. Morphio Pro ($5/month, or $29 once for lifetime access) removes the daily cap and raises the per-file limit to 5 GB.
Morphio decodes the MKV file at full fidelity and re-encodes it at a high-quality M4V setting, so the difference is normally invisible or inaudible. What conversion cannot do is recover detail the original MKV file already threw away.
Yes — drop the whole batch in and each file is processed in turn on your own machine. The practical limit is your device's memory and patience, not a server quota, because nothing is queued anywhere else.
No. The conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can disconnect from the internet after the page loads and it still works.