Convert a video to another format

MP4, MOV and MKV convert both ways. Right in your browser, nothing uploads. Sign up and get 5 free credits — no credit card required.

Dieses Tool ist in deinem Browser nicht verfügbar — ihm fehlt eine erforderliche Funktion (WebAssembly). Bitte öffne diese Seite im aktuellsten Chrome oder Edge.

Runs entirely in your browser — the video never uploads.

Was du erhältst

The same footage in the container you need — converted locally, nothing uploaded.

Before
Before
After
After

Three steps, zero upload

  1. Drop your video

    MP4, MOV or MKV up to 500 MB and 30 minutes. The file is opened locally — nothing leaves your device.

  2. Confirm current format, pick the target

    We auto-detect the current format from the file — no setup needed. Then choose the target: MP4 (plays everywhere), MOV or MKV. Conversion runs on your machine with WebAssembly.

  3. Download the converted file

    Save it instantly. A 10-minute video converts for 1 credit — and bought credits never expire.

Frequently asked questions

Does my video upload anywhere?

No. Conversion runs entirely in your browser with WebAssembly. The file never leaves your device — that is the whole point of this tool.

Which conversions can I do?

MP4, MOV and MKV convert both ways (the current format is excluded from the target list). Phone and camera files that others can't open usually just need a container change to MP4. Want the sound only? Use our Extract Audio tool — MP3, WAV and M4A, same local processing.

Does it cost credits?

0.1 credits per minute — a 10-minute video costs 1 credit. Short clips cost a fraction of that, and your free trial credits cover the first tries.

Will the quality change?

MP4 conversion re-encodes at a quality-first setting — visually the same in normal playback.

Does converting MKV to MP4 always re-encode?

Not necessarily. If the video and audio codecs are already MP4-compatible (e.g. H.264), only the wrapper changes — a remux that finishes in seconds with zero quality loss. The tool picks the lossless path automatically and only re-encodes when the codecs aren't compatible.

I record with OBS — why is my file MKV?

OBS defaults to MKV because the container survives crashes — a recording cut short by a power cut or app failure stays playable. Convert it to MP4 before publishing to most platforms; it's the standard last step in a streamer's workflow.

How long can the video be?

Up to 30 minutes per file. Local conversion is limited by your device memory and CPU, not by a queue.

Which browsers work?

Chrome and Edge are fastest. Safari and Firefox work too; big files are tighter on memory there.