Translating EPUB files while maintaining their original display format can be achieved by identifying all text locations, then translating and populating the content into the corresponding positions.

PDF.js is a JavaScript library for rendering and interacting with PDF documents on web pages. While PDF.js is primarily used for displaying PDF documents in browsers, it also provides APIs and functionality for extracting text information from PDFs.

Looking for the best PDF translation tool? We've reviewed the top 5 websites for 2026 that deliver accurate translations while fully preserving your original document's layout and formatting.