I built this because I was frustrated trying to translate a 400-page PDF book. Every tool had character limits that made it useless for full documents.

DocBabel lets you upload a book or long document and get it fully translated. No copy-pasting chunks into ChatGPT, no character limits, no working page by page.

It handles PDFs, EPUBs, and large text files. The AI maintains context across hundreds of pages, keeps terminology consistent, and preserves the author's writing style.

Would love feedback from the HN community on what features would be most useful for translating technical documentation or research papers.

I don't see how to cancel the subscription. There is no option for purchasing a non-renewing subscription.