RM to OPUS Converter

Convert RM files to OPUS 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
RM → OPUS

What changes in this conversion

  • OPUS is a newer format — check that the software or device you are sending it to supports it before switching.
  • Only the audio track is kept — the video picture is discarded, so the result is far smaller than the original RM file.

How to use

  1. Add your RM file

    Drag the RM 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 OPUS as the output

    OPUS is already selected as the output format on this page. You can pick the bitrate — higher keeps more of the sound, lower makes a smaller file.

  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 OPUS file

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

About these formats

RM RealMedia

RealNetworks' streaming video format, with almost no playback options remaining today.

Commonly used for Legacy internet broadcast archives

RM File format reference

OPUS Opus Audio

A modern codec offering the best efficiency available today for both speech and music. Discord, WhatsApp, and other real-time voice services use it.

Commonly used for Voice calls, podcasts, low-bandwidth audio

OPUS File format reference

Frequently asked questions

Is converting RM to OPUS really free?

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

Are my RM files uploaded to a server?

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

Will the OPUS file open everywhere?

OPUS is a newer format. Current browsers and phones handle it, but older desktop software may not — keep the original RM if you have to send it to someone on an old machine.

Does the picture disappear when I convert RM to OPUS?

Yes — OPUS is an audio format, so only the soundtrack is extracted. The video track is dropped, which is usually the point when you want just the audio.

Is there a file size limit for RM to OPUS 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 RM files to other formats

RM AAC RM AVI RM FLAC RM GIF RM M4A RM MKV RM MOV RM MP3 RM MP4 RM OGG RM WAV RM WEBM

Convert other formats to OPUS

3G2 OPUS 3GP OPUS AAC OPUS AC3 OPUS AIF OPUS AIFF OPUS ALAC OPUS AMR OPUS ASF OPUS AU OPUS AVI OPUS DIVX OPUS

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