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RM to M4B Converter

Convert RM files to M4B online for free. Upload one file or many and download the M4B results one by one or all together in a ZIP. No sign-up needed.

convert
RM
MP3WAVAACFLACOGGOGAM4AWMAAIFFAIFCOPUSAC3ALACAUCAFVOCWEBAAMRAPEDSSSHN
MP4M4VMOVMKVWEBMAVIFLVWMVMPEGMPGMODVOB3GP3GPP3G2OGVTSMTSM2TSMXFDVRMRMVBSWFWTVCAVSDVR

No format found

to
M4B
MP3WAVAACFLACOGGOGAM4AM4BWMAAIFFAIFCOPUSAC3ALACAUCAFVOCWEBAAMR
GIFWEBP
MP4M4VMOVMKVWEBMAVIFLVWMVMPEGMPGMODVOB3GP3GPP3G2OGVTSMTSM2TSMXFDVRMVBSWFWTVGIFCAVSDVR

No format found

Drop your RM files here
or click to choose RM files · up to 95MB each

How to convert RM to M4B

  1. Choose your files. Click Select File or drag your RM files into the upload box. You can add many at once.
  2. Pick the settings. M4B is already selected as the output format. The conversion starts as soon as a file is added.
  3. Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.

RM – RealMedia

RM is the RealMedia streaming format from RealNetworks, common on the early web.

More RM conversions

M4B – MPEG-4 Audiobook

M4B is an MPEG-4 audio file for audiobooks. It supports chapters and remembers where you stopped listening.

More M4B conversions

Converting RM to M4B

Frequently asked questions

How do I convert RM to M4B?

Click Select File or drop your RM file onto the upload box. The converted M4B appears in the list below with a download button. You can add many files at once and download them together as a ZIP.

Is it really free?

Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.

Are my files stored?

Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.

Will quality drop?

For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.

Related converters

How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.