CHM Converter

Convert HTML help files (CHM) online for free


Drop or upload your .CHM file
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How to convert your CHM file

  1. Click the "Select File" button above, and choose your CHM file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert CHM to another file type

The converter easily converts your CHM help files to various formats - free and online. No Microsoft Windows or or other E-Book software needed.

  • CHM to PDF
  • CHM to EPUB
  • CHM to TXT
  • CHM to FB2
  • CHM to PDB
  • CHM to LIT
  • CHM to MOBI
  • CHM to TCR
  • CHM to LRF
  • CHM to HTMLZ
  • CHM to AZW3
  • CHM to TXTZ

Convert a file to CHM

To convert other file formats to the "Compiled Help Archive" file type, you need software like Microsoft Windows or a similar tool.


About CHM files

A .CHM file is a Microsoft Compiled HTML Help archive containing a collection of HTML pages, images, and an interactive index. These files are typically used for software manuals and offline documentation. On Windows, they are opened natively by the Microsoft HTML Help Executable (hh.exe). Despite their compact size, .CHM files have significant disadvantages. They rely on outdated Internet Explorer rendering engines and pose major security risks. Windows actively blocks downloaded .CHM files via the Mark of the Web (MOTW) security protocol, which often results in frustrating blank pages when users try to open them. Furthermore, the format is entirely unsupported on macOS, iOS, and Android without specialized third-party readers. To overcome these limitations, you should convert the file. For cross-platform reading and easy printing, convert to PDF. For mobile devices and e-readers, convert to EPUB. If you need to edit or host the original documentation, convert to an archive of HTML files. Just drag and drop your file here to analyze and convert it - free, online, and without installing software.

Use Convert.Guru to open and convert your CHM file.

Users also converted CHW, HLP, CFM, CSM, CIM, VDOC, CHR, CHT, PDF, GHO, TORRENT, OPF and BIN files.


FAQ

If you want to convert CHM file to HTML, MARKDOWN, HTM, CSS, JS, PHP, ASP, ASPX or JSP, you can use Microsoft Windows or similar software from the "Software Documentation and Help" category. In the File menu, look for Save As… or Export….

To convert RSS, CSS, CGI, SITEMAP, PL, WEBMANIFEST, JSON, JS, XML, HTML, ICO or HTM files to CHM, try Microsoft Windows or another comparable tool in the "Software Documentation and Help" category.



The CHM Converter Story

The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our CHM converter.