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Check if your EPUB meets the standards

Validate your EPUB to make sure it works well on different devices and is accessible to all recipients.

We check compliance with W3C standards using EPUBCheck and accessibility with Ace by DAISY.

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Your files are safe. We will store them on our own secure servers, no third-party involved.
Immediately after validation, we delete all your files from our servers.
No credit card or email required. This service is free, no strings attached.