How to open a .rm file (Windows, Mac, Linux)

Q: Why can't I open my .rm file?

Usually your computer lacks an app that understands RealMedia. Install one of the apps listed here, or convert the file to a more common format.

A .rm file is a RealMedia Audio/Video File. If double-clicking does nothing, your computer simply does not have an app that reads RealMedia yet. Here is how to fix that on each operating system, using free software wherever possible.

Open a .rm file step by step

Confirm the file really is a .rm. Drop it into the WhatFileType file identifier, which reads its signature without uploading anything.
On Windows, open it with VLC or MPC-HC.
On Mac, use VLC.
On Linux, try VLC or ffmpeg.
Still stuck? Convert the .rm to mp4, which opens more widely.

Best apps to open .rm files

Windows

VLC
MPC-HC
RealPlayer

macOS

Linux

VLC
ffmpeg

Before you open it: Mostly safe as media, but historic RealPlayer versions had many security holes. Play old .rm files in VLC rather than installing legacy RealPlayer software.

Frequently asked questions

Why can't I open my .rm file?

Almost always because no installed app understands RealMedia. Install one of the apps above, or convert the file to a format your existing software already reads.

How do I play an .rm or .rmvb file today?

VLC plays most of them out of the box on every platform. If a file fails, convert it with ffmpeg -i input.rmvb output.mp4 and play the MP4.

What is the difference between .rm and .rmvb?

Bitrate handling. .rm is constant-bitrate, tuned for live streaming; .rmvb is variable-bitrate, tuned for downloads where quality per megabyte matters more.