video format

What is a .RM file?

RM (RealMedia) is RealNetworks' format from the early streaming era, once everywhere online but now obsolete.

Full name
RealMedia
Developed by
RealNetworks
Released
1995
Extension
.rm
MIME type
video/rm
Transparency
No

How to open a RM file

RM plays in RealPlayer and VLC; convert to MP4 to watch on modern devices.

What RM files are used for

Sharing & social

Clips that play on every platform.

Editing & post

Footage in production pipelines.

Streaming & web

Embedded and hosted playback.

Strengths & limitations

✔ Strengths✖ Limitations
Excellent compatibilityNo transparency support
Limited support — may need converting

Need more than a conversion?

Remove the background from RM images, upscale to 4K, or generate new visuals with SharkFoto AI.

Frequently asked questions

RM (RealMedia) is RealNetworks' format from the early streaming era, once everywhere online but now obsolete.

RM plays in RealPlayer and VLC; convert to MP4 to watch on modern devices.

RM is optimised for its specific use rather than strictly lossless storage.

Use SharkFoto's free tools — upload your RM file and convert it to a more convenient format in seconds. It's free, processed securely and never stored.

No — RM doesn't store transparency; convert to PNG or WEBP if you need it.