How to Convert Ebook Formats Online — Free (2026)
Ebooks come in multiple formats — EPUB for most e-readers, MOBI/AZW3 for Kindle, PDF for universal reading. Converting between ebook formats ensures your books work on your specific device and reading app.
ToolHQ's Ebook Converter (coming soon) will support EPUB, MOBI, AZW3, PDF, and TXT conversions free with no registration.
Common Ebook Formats
**EPUB:** The open standard for ebooks. Supported by Apple Books, Kobo, Google Play Books, Adobe Digital Editions, and most non-Kindle readers. Reflowable text adapts to screen size.
**MOBI / AZW3:** Amazon Kindle's proprietary format. AZW3 is the modern version with better formatting support. Only works on Kindle devices and the Kindle app.
**PDF:** Universal format. Fixed layout — text doesn't reflow based on screen size. Not ideal for small e-readers but universal compatibility.
**TXT:** Plain text. No formatting, images, or special characters. Works everywhere but loses all formatting.
How to Convert Ebooks on ToolHQ
Converting ebook formats takes three steps:
**Step 1:** Go to toolhq.app/tools/ebook-converter.
**Step 2:** Upload your ebook file.
**Step 3:** Select the output format and click 'Convert'. Download your converted ebook.
For Kindle users: convert EPUB to MOBI or AZW3. For all other e-readers: EPUB is the universal choice. For sharing and printing: convert to PDF.
DRM and Ebook Conversion
DRM (Digital Rights Management) is copy protection applied to commercially purchased ebooks from Amazon, Apple Books, and other stores. DRM-protected ebooks cannot be converted — the conversion tool can't access the encrypted content.
ToolHQ's ebook converter works with DRM-free ebooks: - Ebooks you've created yourself - DRM-free ebooks purchased from retailers like Smashwords, Gumroad, or Humble Bundle - Open-source ebooks from Project Gutenberg - Ebooks you've received as free downloads
To convert purchased ebooks from Amazon or Apple, the books must be DRM-free versions.
Conclusion
Ebook conversion ensures your books work on any device. ToolHQ's Ebook Converter (coming soon) handles all major formats free at toolhq.app/tools/ebook-converter.
Perguntas Frequentes
Is ebook conversion free?
Yes, completely free with no registration. Coming soon.
Can I convert EPUB to Kindle format?
Yes. Convert EPUB to MOBI or AZW3 for Kindle compatibility. Transfer to Kindle via USB or email to your Kindle email address.
Why can't I convert my Amazon ebook?
Amazon ebooks purchased from the Kindle store are DRM-protected. DRM-protected files cannot be converted. Only DRM-free ebooks can be converted.
Does EPUB to PDF preserve formatting?
PDF conversion captures the reflowable EPUB layout at a fixed page size. Formatting is preserved but text no longer reflows based on screen size.
Can I convert a PDF book to EPUB?
Yes, but with limitations. PDF to EPUB conversion is imperfect — text reflow from fixed-layout PDF to reflowable EPUB often requires cleanup, especially for multi-column layouts.