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AI · August 24, 2025

BookTranslator

Hi HN! I built *BookTranslator.app* (https://www.booktranslator.app/) initially to help myself read English books in my native language. Later on as I shared on twitter, more and more people were finding it useful. So I thought it might also be helpful to share it here. You can drag-and-drop an *EPUB or PDF (≤ 50 MB)*, pick one of *76 target languages*, and ~60 seconds later you get a layout-preserving translation plus a side-by-side bilingual reader. The whole pipeline runs on the gpt-4o API with a bit of prompt-engineering to keep chapter structure, images and footnotes…

BookTranslator launched on August 24, 2025 with 12 votes, #1,214 of 8,530 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.

Visit booktranslator.app ↗BookTranslator alternativestop 14% of August 2025

What it does

BookTranslator is a book translation tool that can accurately translate the entire EPUB / PDF book into the language you want in just one minute.

Translate PDF, EPUB, DOCX books and more with BookTranslator. Get AI-powered translation in minutes across 100+ languages, with perfect formatting and every layout and image preserved.

Translate your entire book into any language in minutes with BookTranslator. Support for PDF, EPUB, DOCX, MOBI, and more, with 168 languages, while preserving your original layout and keeping terminology consistent . Save hundreds of dollars and hours of time by using BookTranslator to translate your books. Whether you're reading a foreign title or preparing your own manuscript for another market, BookTranslator helps you go from complex file to usable translated output with less manual work. BookTranslator works across the document, helping names, terms, context, and layout stay consistent. Download a target-language or bilingual copy and start reading. Explore authentic before-and-after…from booktranslator.app

In the maker’s words, at launch

Hi HN! I built *BookTranslator.app* (https://www.booktranslator.app/) initially to help myself read English books in my native language. Later on as I shared on twitter, more and more people were finding it useful. So I thought it might also be helpful to share it here. You can drag-and-drop an *EPUB…

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