Free Online EPUB Converter
EPUB reflows to fit any screen, which some readers and printers resist.
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Checking files and selected output formats.
How to convert EPUB files online
Convert EPUB ebooks to MOBI, AZW3, PDF, FB2, and more online, chapter structure, formatting, and cover images are preserved.
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Upload your EPUB ebook
Drag and drop EPUB files from Apple Books, Kobo, Calibre, or any other source. Batch upload is supported for converting entire ebook libraries at once.
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Choose your target format
Select MOBI or AZW3 to read on Kindle, PDF for universal sharing and printing, or FB2 for FictionBook readers. Chapter navigation, fonts, and images transfer to all supported formats.
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Download your converted ebook
Download the converted file and transfer it to your eReader via USB, email, or cloud sync. For Kindle, use Send to Kindle or USB transfer. Files auto-delete from our servers within 1 hour.
Reasons to convert EPUB files
Kindle doesn't support EPUB natively. Convert EPUB to MOBI or AZW3 to read your open-format books on any Kindle device or the Kindle app.
Convert EPUB to PDF for sharing with anyone - PDF works on every device, browser, and operating system without special software.
EPUB is designed for screens with reflowable text. Convert to PDF to create a print-ready version with fixed page layout.
Switching between Kobo, Kindle, Apple Books and Nook means converting EPUB to the new device's preferred format without losing your library.
EPUB is an open ISO standard (ISO/IEC 23736). Convert proprietary formats to EPUB for long-term preservation and vendor independence.
Upload multiple EPUB files at once and convert your entire ebook library to a new format in minutes rather than one by one.
Convert EPUB ebooks online, no desktop apps, no plugins. No watermarks added, formatting preserved, and files are deleted from our servers within 1 hour.
About the EPUB Format
EPUB (Electronic Publication) is the most widely adopted open ebook standard, maintained by the W3C (formerly IDPF) and published as ISO/IEC 23736. First released in 2007 as the successor to the Open eBook format, EPUB uses XHTML for content, CSS for styling, and ZIP compression for packaging. Its defining feature is reflowable text, content automatically adapts to fit any screen size, allowing readers to adjust font size, margins, and line spacing on phones, tablets, and dedicated eReaders.
EPUB is natively supported by Apple Books, Kobo, Nook, Google Play Books, and nearly every eReader and reading app outside the Kindle ecosystem. EPUB 3, the current version, adds support for embedded fonts, SVG graphics, MathML equations, JavaScript interactivity, audio/video embedding, and comprehensive accessibility features including text-to-speech and screen reader support. While Kindle devices do not read EPUB natively, the format can be converted to MOBI or AZW3 for Kindle compatibility.