EPUB Metadata Fixer

Free tools for self-published authors to check and fix EPUB metadata and cover images before submitting to a storefront. Everything runs in your browser — no file is ever uploaded anywhere.

• EPUB Metadata Checker

  Upload an .epub and see whether its title, author, language, and identifiers meet the EPUB 2/3 spec's requirements — plus whether it has a cover image declared correctly.

• EPUB Metadata Fixer

  Upload an .epub, edit its title, author, language, publisher, description, and identifier, and download a corrected copy — nothing is uploaded to a server.

• EPUB Cover Image Checker

  Check a cover image's pixel dimensions and aspect ratio against Amazon KDP, Kobo Writing Life, and Apple Books requirements before you upload it.