✨ 1 free validation per day
Free Online EPUB Validator
Free EPUB File Validation - EPUB 2 and EPUB 3 Checker
Validate your EPUB files for free every day. Instant EPUB 2 and EPUB 3 compliance checking with detailed error reports.
FREE
1 validation/day
No credit card
€3.99
10 validations/month
€15.99
Unlimited validations
EPUB Validator
Upload your EPUB file to validate it against EPUB 2 and EPUB 3 standards
Drag and drop your EPUB file here
or click to browse
Free validations remaining today: 1
Why choose our free EPUB validator?
W3C Standards Compliant
Using the official EPUBCheck tool from W3C to ensure accurate validation
Fast & Reliable
Get instant validation results with detailed error reporting
Secure & Private
Your files are automatically deleted after validation