.EPUB file extension
To open .EPUB files on Windows, right-click the .EPUB file and select 'Open with'.
.EPUB files are digital book files that can be opened using e-reader applications on your device. To open a .EPUB file, use a compatible app available for your operating system.
Last updated: March 19, 2026 · Reviewed by Julian Stricker
Open on your device
Choose your operating system for a dedicated step-by-step opening guide.
How to open .EPUB files
Use these platform-specific instructions to open .EPUB files safely.
Windows
- Right-click the .EPUB file and select 'Open with'.
- Choose an e-reader app like Adobe Digital Editions or Calibre.
Mac
- Control-click the .EPUB file and choose 'Open With'.
- Select an application such as Apple Books or Calibre.
Linux
- Right-click the .EPUB file and select 'Open With'.
- Choose an installed e-reader like FBReader or Calibre.
iOS
- Tap the .EPUB file in the Files app.
- Select 'Open in' and choose an app like Apple Books or a third-party reader.
Android
- Open the .EPUB file from your file manager.
- Select an e-reader app like Google Play Books or Moon+ Reader.
Security notes
- Only download .EPUB files from reputable sources.
- Use antivirus software to scan files before opening.
- Be cautious with .EPUB files that contain scripts or interactive content.
Recommended antivirus software
Scan files before opening them. These antivirus tools help protect against malware and viruses.
Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.
NortonNorton 360 delivers comprehensive antivirus protection, VPN, and identity theft monitoring. Scan files for threats before opening to keep your device secure.
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Can't open this file?
These are the most common causes and fixes when .EPUB files fail to open.
Common reasons
- .EPUB file won't open
- Text formatting issues
Fix steps
- Ensure a compatible e-reader app is installed.
- Check the file integrity and re-download if necessary.
- Try opening the file with a different app.
OS-specific troubleshooting
Convert .EPUB to other formats
Use conversion tools to change .EPUB files into formats your software supports.
What is a .EPUB file?
.EPUB is a widely adopted e-book format that stands for Electronic Publication. It is an open standard maintained by the International Digital Publishing Forum (IDPF) and is based on XHTML, XML, and CSS.
Background
.EPUB files are a popular format for e-books and digital publications due to their flexibility and compatibility with various devices. They are designed to be reflowable, meaning the text can adapt to different screen sizes, making them ideal for reading on both small and large devices. The format was first introduced in 2007 by the IDPF and has since become the industry standard for e-books. .EPUB files are often used by publishers, authors, and educational institutions to distribute digital content. They can include multimedia elements such as images, videos, and interactive features, enhancing the reading experience.
Common MIME types: application/epub+zip
Further reading
Authoritative resources for more details on the .EPUB format.
Common .EPUB issues
.EPUB file won't open
This issue can occur if the necessary app is not installed or the file is corrupted.
- Ensure a compatible e-reader app is installed.
- Check the file integrity and re-download if necessary.
- Try opening the file with a different app.
Text formatting issues
The text may not display correctly due to compatibility issues with the reader app.
- Update the e-reader app to the latest version.
- Try a different e-reader app that supports advanced formatting.
- Convert the .EPUB file to another format using a tool like Calibre.
FAQ
Can I convert a PDF to .EPUB?
Yes, you can use conversion tools like Calibre to convert PDF files to .EPUB format.
Are .EPUB files compatible with Kindle?
Kindle devices do not natively support .EPUB files, but you can convert them to a compatible format using tools like Calibre.
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