Free Online Ebook Converter — EPUB, MOBI, AZW3, FB2
Convert between ebook formats online for free. Change EPUB, MOBI, AZW3 (Kindle KF8), FB2, and PDF files into the format your eReader needs. No software to install, no signup required — files are processed in your browser and auto-deleted within 1 hour.
Max file size 50MB. Sign up for more.
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About Free Online Ebook Converter — EPUB, MOBI, AZW3, FB2
Ebook format determines which devices can read your books and how the reading experience is presented. EPUB is the open standard supported by Apple Books, Kobo, Nook, and Google Play Books — it uses reflowable text that adapts to any screen size. MOBI and AZW3 are Amazon's Kindle formats, with AZW3 (KF8) offering enhanced typesetting, embedded fonts, and responsive layouts that the older MOBI format cannot match.
Converting between ebook formats lets you read on any device regardless of where you purchased your books. Convert EPUB to MOBI or AZW3 for Kindle, or convert Kindle formats to EPUB for Kobo, Nook, or Apple Books. For universal sharing, convert any ebook to PDF for a fixed-layout document that opens on every device. Legacy formats like FB2, LIT, and PDB can be converted to modern formats to keep your ebook library accessible on current devices.
Comic book formats CBR and CBZ package sequential comic page images into compressed archives. CBR uses RAR compression while CBZ uses the more widely compatible ZIP format. Both can be converted to PDF for universal reading or between each other for compatibility with specific comic reader applications. For long-term ebook preservation, EPUB is the recommended format — it is an open W3C standard with broad device support and active development.
How to Convert Ebooks Online
Convert EPUB, MOBI, AZW3, FB2, and more from any browser — on Windows, Mac, iPhone, or Android. No software to install, no account required.
Drop your file or click to browse. Accepts EPUB, MOBI, AZW3, FB2, LIT, PDB, CBR, CBZ, and more. Works from any device — drag files from your desktop or pick from cloud storage.
Select your output: EPUB for open eReaders, MOBI or AZW3 for Kindle, PDF for universal sharing and printing, or FB2 for FictionBook readers. Chapter structure and formatting are preserved.
Your converted ebook downloads in seconds — no watermarks, no quality loss. Transfer to your eReader via USB, email, or cloud sync. Files are permanently deleted from our servers within 1 hour.
Guides for Free Online Ebook Converter — EPUB, MOBI, AZW3, FB2
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