CHM to EPUB Converter
Drag & drop your files here or click to upload
How to convert CHM to EPUB online
Upload your CHM file
Start converting
Download your EPUB
What is a CHM file?
CHM (Compiled HTML Help) is a proprietary help file format developed by Microsoft. It consists of compressed HTML documents, images, and navigation tools used to create interactive help systems for software.
CHM files are most commonly found in Windows applications and support features like full-text search, indexing, and hyperlinking. Although it’s an older format, it's still widely supported in technical documentation.
How to open CHM files
CHM files can be opened on Windows with the built-in Microsoft HTML Help Viewer. On other platforms, use CHM viewers like xCHM, KchmViewer, or Calibre.
Use AnyConv to convert CHM files to PDF or HTML if you want to read them on unsupported devices or browsers.
Key facts about CHM
- Full name: Compiled HTML Help File
- Extension: .chm
- MIME type: application/vnd.ms-htmlhelp
- Developed by: Microsoft
- Initial release: 1997
Useful links and resources
What is a EPUB file?
EPUB (Electronic Publication) is a widely adopted open eBook format maintained by the W3C. It uses HTML and XML to structure content, making it highly adaptable to different screen sizes and devices.
EPUB files support rich formatting, images, and embedded fonts, and are compatible with most eBook readers, including Apple Books, Kobo, and many Android apps. It is often preferred for its flexibility and non-proprietary nature.
How to open EPUB files
EPUB files can be opened using Apple Books, Google Play Books, Kobo, and many eReader apps on Android and iOS. Desktop users can use Calibre, Adobe Digital Editions, or browser plugins like EPUBReader.
AnyConv allows you to convert EPUB files to PDF, MOBI, or AZW for compatibility with Kindle or other platforms.
Key facts about EPUB
- Full name: Electronic Publication
- Extension: .epub
- MIME type: application/epub+zip
- Developed by: International Digital Publishing Forum (IDPF)
- Initial release: 2007
Useful links and resources
Convert from CHM
Convert to EPUB
❓ Frequently Asked Questions
- Do I need to register to convert CHM files?Not at all! You can convert CHM to EPUB without signing up or installing anything.
- Is it safe to convert CHM to EPUB on AnyConv?Absolutely. All CHM and EPUB files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
- Will the quality change after converting CHM to EPUB?We do our best to preserve the original quality during CHM to EPUB conversion. The result is accurate and clean.
- How long does it take to convert CHM to EPUB?Most conversions from CHM to EPUB take just a few seconds — even for larger files.
- Can I upload more than one CHM file?Yes, batch conversion is supported. You can convert multiple CHM files to EPUB at once — fast and easy.
- What browsers support CHM to EPUB conversion?All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting CHM to EPUB on any platform.