RMVB to MKV Converter

Convert RMVB files to MKV free in your browser — no signup, no install, and the file is never uploaded to a server.

Completely free Files are never uploaded No signup required
Drop files or click to select
RMVB → MKV

What changes in this conversion

  • The picture and sound are re-encoded to H.264 video with AAC audio inside the MKV container, which is what makes the result play on the widest range of devices.

How to use

  1. Add your RMVB file

    Drag the RMVB file onto the drop area above, or click it to pick a file from your device. You can add several files at once.

  2. Confirm MKV as the output

    MKV is already selected as the output format on this page. You can pick the resolution. Encoding is the slowest part, so smaller resolutions finish sooner.

  3. Run the conversion

    Press the convert button. Video is re-encoded frame by frame on your own machine, so a long clip can take several minutes. The tab has to stay open.

  4. Download the MKV file

    When it finishes, download the MKV file. Converting multiple files gives you the option to download them together as a ZIP.

About these formats

RMVB RealMedia Variable Bitrate

The variable-bitrate version of RM, widely used for video distribution across Asia.

Commonly used for Legacy Asian video files

RMVB File format reference

MKV Matroska Video

An open-source video container able to hold unlimited subtitles, audio tracks, and chapters. It is favored for archiving high-quality video.

Commonly used for High-quality video archives, multilingual subtitled video

MKV File format reference

Frequently asked questions

Is converting RMVB to MKV really free?

Yes. RMVB to MKV conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.

Are my RMVB files uploaded to a server?

No. The conversion runs entirely inside your browser using WebAssembly, so the RMVB file never leaves your device. That is also why it works without an internet connection once the page has loaded.

Is there a file size limit for RMVB to MKV conversion?

The free plan handles files up to 200MB. Because processing happens on your own device, very large files depend on your computer's memory rather than a server quota.

Convert RMVB files to other formats

RMVB AAC RMVB AVI RMVB FLAC RMVB GIF RMVB M4A RMVB MOV RMVB MP3 RMVB MP4 RMVB OGG RMVB OPUS RMVB WAV RMVB WEBM

Convert other formats to MKV

3G2 MKV 3GP MKV ASF MKV AVI MKV DIVX MKV F4V MKV FLV MKV M2TS MKV M4V MKV MOV MKV MP4 MKV MPE MKV

Video converter

What each file format is, what it is used for, and which formats it can be converted to.

Open converter Browse the full format reference