Convert CHM to LRF
Online & free tool to convert CHM files to LRF


1) Input file

Choose source file(s) to convert:

0 of 5 files added (up to 300 MiB combined)

2) Output format

Select a target format to convert to:

3) Convert

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1) File URL

Choose file URL to convert:


2) Output format

Select a target format to convert to:

3) Convert

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1) Cloud Service

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2) Output format

Select a target format to convert to:

3) Convert

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CHM The CHM file format and its associated .chm filename extension, is a proprietary file format developed by Microsoft. Its full name is compiled HTML Help. CHM was released to the public in 1997 as a bundle with Microsoft Windows 98 and was primarily designed to facilitate documentation on the Windows platform, particularly help files for software applications that run on the Microsoft Windows platform. Essentially, a CHM file is a collection of HTML files packed as a single compressed file. Though the format is proprietary, it was successfully reverse engineered by the late 90's to early 2000s allowing the development of open source readers that are capable of opening files with the .chm extension. The format was succeeded by the LIT format.
LRF The LRF format is a proprietary format developed by Sony in collaboration with Canon, as a document and text encoding standard for the Broad Band eBook file format. The format specifically targeted Sony portable eBook readers and was capable of encoding both text, pagination, and images. Being unencrypted, LRF encoded files do not enforce DRM. This is in contrast to the LRX format which is also part of the BBeB eBook file format which does support encryption for DRM files. The Sony eBook store announced in July 2010 a discontinuation of support for the LRF format in favor of the public and open EPUB format.

How to convert CHM to LRF

STEP 1

Select the document file in the CHM format to convert to the LRF format, you can select a file from your computer or your Google Drive or Dropbox account.                            

STEP 2

Choose the LRF format from the drop-down list as the output format, and click the Convert button, you can convert up to 5 files at the same time and a maximum size of up to 300 MiB.

STEP 3

Wait until your file is uploaded and converted into the LRF ebook format, you can download the converted file up to a maximum of 5 times, and can also delete the file from the Download page.