epubcheck

The conformance checker for EPUB publications

A simple template to help you create ePub-formatted books.

Standalone “EPUB-Checker” application for Windows, macOS, and Linux

Advanced EPUB optimizer: minifies HTML/CSS/JS, compresses and downscales images, subsets fonts, optimizes SVGs, and repackages EPUBs for smaller, faster, and standards-compliant e-books.

A tool to manipulate ePub files.

wrapper command of idpf/epubcheck

[INACTIVE] Ruby GEM for validating EPUB ebooks, using epubcheck

A TypeScript port of EPUBCheck - the official conformance checker for EPUB publications

A Sigil plugin that validates EPUB files using epubcheck

Ferramenta front-end estática para validar, reparar e reempacotar arquivos .epub diretamente no navegador, com objetivo em aumentar a compatibilidade com fluxos de envio/upload para Kindle

📚 Convert scanned PDFs into clean EPUB ebooks effortlessly with intelligent layout analysis and smart chapter detection.

Dockerfile for EPUBCheck

A premium, browser-based tool to optimize and repair EPUB files specifically for Amazon's "Send to Kindle" service. 100% client-side, offline-safe, and privacy-focused.

This tool upgrades EPUB files to the EPUB 3.3 standard by W3C Recommendation

Scanned PDFs, web pages and broken EPUBs → one clean, reflowable EPUB3 that passes official epubcheck at zero errors. Apple Vision OCR on your own Mac — and the OCR ships as its own CLI. 100% offline, no API key, MIT.

ePubCheck Helper

Validate, repair and convert EPUB, MOBI and AZW3 ebooks online - fix manifest, spine, TOC and metadata errors with epubcheck and Calibre.

ePub v3.0 boilerplate for quick ePub generation, including epubchecker

EPUB translator and editor: AI-powered EPUB translation, post-editing and QA in Python/Tkinter.

Strip OceanofPDF.com watermark links from EPUBs: markup-only, never touching images, output epubcheck-clean. Also repairs mimetype ordering. Stdlib-only, zero dependencies.