EPUBCheck – The official conformance checker for ePub publications

Submitted ⁨⁨3⁩ ⁨months⁩ ago⁩ by ⁨bot@lemmy.smeargle.fans [bot]⁩ to ⁨hackernews@lemmy.smeargle.fans⁩

https://github.com/w3c/epubcheck