EPUB Validator Pro
Comprehensive EPUB validation with detailed reporting
đ Drop your EPUB file here or click to browse
Supports comprehensive validation for all major retailers
Validating your EPUB file...
đ Core Structure Validation
Validates MIME type, container.xml, OPF package, manifest completeness, spine ordering, and EPUB 2/3 compliance
đ Metadata Verification
Checks title, author, publisher, ISBN (with checksum validation), language codes, rights statements, and cover implementation
đĒ Retailer Compatibility
Tests compatibility with Amazon Kindle, Apple Books, Google Play, Barnes & Noble, and Kobo with specific retailer requirements
đ¨ CSS & Styling Analysis
Validates CSS syntax, checks Kindle-unsupported properties, and warns about reader control overrides
đ Language & Spelling
Validates language tags, detects untagged foreign words/phrases, and performs spell checking in 25+ languages
âŋ Accessibility (WCAG/EPUB Accessibility)
Validates alt text coverage, ARIA roles, page navigation, structural markup, and Schema.org accessibility metadata
đ§ Navigation Validation
Checks NCX/Nav documents, TOC structure, landmarks, page lists, and navigation point consistency
đŧī¸ Image Analysis
Validates image formats, cover dimensions (retailer-specific), alt text quality, and extended descriptions
đ Content Quality
Detects self-closing span tags, encoding mismatches, orphaned files, and character encoding issues
đ URL & Link Validation
Detects unlinked URLs in text, validates internal references, and checks hyperlink integrity
đ EPUB Type Detection
Identifies EPUB version, fixed layout vs reflowable, media overlays, scripting, and calculates accessibility scores
đ PDF Reports
Generate detailed PDF validation reports with issue breakdowns, file summaries, and actionable recommendations