Validate EPUB

Check an EPUB’s structure (packaging, manifest, spine, navigation, links, XHTML) and see what is wrong.

Choose epub bookor drop it here · EPUB
  • Runs on your device. Files are never uploaded.
  • Free and unlimited. No sign-up, no watermark.
1

Add your file

Choose or drop it in. It opens right here in your browser.

2

Pick the settings

Or keep the defaults, which suit most files.

3

Download

Your file is made on your own device, then saved like any download.

More ebooks tools

Edit EPUB metadataChange an EPUB’s title, author, language, publisher, date, tags, series and description.Edit ebook title and authorFix the title and author an EPUB shows in your library.Change EPUB coverReplace the cover picture of an EPUB book, or add one if it has none.Extract EPUB imagesSave the cover and every picture inside an EPUB book.Extract EPUB textCopy all the text out of an EPUB book, chapter by chapter.Merge EPUB filesJoin several EPUB books into one, with a table of contents for each book.Split EPUB chaptersSplit an EPUB into smaller books, one per chapter or every few chapters.Ebook file size reducerMake an EPUB smaller by shrinking its large pictures and recompressing the book.