How to convert MOBI to LRF
- Add your .MOBI file - drop it in the box above or click to browse.
- Convert it to .LRF in a few seconds.
- Download your new .LRF file.
What to expect
- LRF is a legacy Sony format for discontinued Sony Reader hardware; it is not aimed at modern e-readers.
- Text and images transfer as a paginated e-book; fine formatting may be simplified in the compiled output.
- DRM-protected MOBI files are blocked from conversion.
Frequently asked questions
What is LRF used for?
LRF is Sony's BBeB (BroadBand eBook) format, used by the older Sony Reader (PRS) hardware. Converting MOBI to LRF targets those legacy Sony devices specifically.
Why would I convert MOBI to LRF today?
The main reason is compatibility with old Sony Reader hardware that reads BBeB rather than modern formats. For current devices, other e-book formats are usually more suitable, since both LRF and the Sony Reader line are discontinued.
Does the text stay readable and reflowable?
Yes. LRF is a compiled e-book container with text, images, and pagination, and the reflowable text from the MOBI carries into it for display on a Sony Reader.
Can DRM-protected books be converted to LRF?
No. DRM-locked MOBI books cannot be converted. Store-protected Sony books also used a separate DRM extension, so only DRM-free content converts cleanly.
Programs that convert MOBI: Calibre · Hamster Free eBook Converter · Calibre for Mac · Calibre for Linux
