To convert RB to LRF, select or drop your .rb file above, check that LRF is chosen as the output, and click Convert. This conversion runs on our server, and your files are deleted 72 hours later.
What is an RB file?
RB – Rocket e-book. RB is the e-book format of the Rocket eBook, one of the first e-readers (1998).
RB Converter →What is an LRF file?
LRF – Sony Reader e-book (LRF). LRF is the e-book format of Sony's older Reader devices.
LRF Converter →How to convert RB to LRF
- Click Select File, or drop your .rb files anywhere on this page. You can add several at once.
- Check that LRF is chosen as the output format. On this page it is picked for you.
- Click Convert. When a file has to go to our server, the button says Upload and convert instead.
- Click Download next to each file when it's done.
RB vs LRF: how they compare
| RB | LRF | |
|---|---|---|
| Layout | Flowing text | Flowing text |
| Editable | No | No |
| Created by | NuvoMedia, 1998 | Sony, 2004 |
| Best for | Rocket eBook readers | Old Sony Reader devices |
Good to know
- The RB e-book is converted by calibre. Copy-protected (DRM) e-books cannot be converted: ConvertKitty does not remove DRM, so use books you have bought without it or that are free of it.
- LRF is Sony's old format: pictures are reduced and some styles are simplified.
- The LRF e-book is made by calibre from the text, headings and pictures of the RB file; a cover is not created.
Frequently asked questions
Is converting RB to LRF free?
Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.
Are my RB files uploaded anywhere?
This conversion runs on our server, because reading an RB file needs calibre, which does not run in a browser. Your file is sent over an encrypted connection, and both it and the result are deleted 72 hours after the conversion. The server has no internet access while it works on your file.
How large can the RB file be?
Up to 1 GB per file. This conversion runs on our server, which accepts files up to that size.
Will the LRF look the same as the RB?
The text, chapters and pictures are kept. The look can differ: LRF readers use their own fonts and page sizes, so page breaks move.
Can I convert several RB files at once?
Yes. Add as many files as you like; they are converted one after another, and each one gets its own Download button.
Convert RB to other formats
- RB Converter
- RB to AZW3 Converter
- RB to EPUB Converter
- RB to MOBI Converter
- RB to OEB Converter
- RB to PDB Converter
- RB to PDF Converter
- RB to RTF Converter
- RB to TXT Converter
Convert other files to LRF
- Convert to LRF
- DOCX to LRF Converter
- PDF to LRF Converter
- EPUB to LRF Converter
- MOBI to LRF Converter
- AZW3 to LRF Converter
- ODT to LRF Converter
- RTF to LRF Converter
- TXT to LRF Converter
- HTML to LRF Converter
- CBZ to LRF Converter
All e-book formats
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