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eBook Converter

Convert MOBI, AZW3, EPUB, PDF & 10+ eBook Formats

Convert eBooks between EPUB, MOBI, AZW3, FB2, PDF, DOCX and more — locally in your browser when possible; legacy formats are handled by a Calibre-powered server that streams files through without storing them. Built-in metadata editor and Kindle-ready presets.

Add to Chrome — FreePrivacy-first

Features

Convert between 15+ formats: EPUB, MOBI, AZW3, FB2, PDF, DOCX, LIT, CHM, RTF, HTML, TXT, MD

Local-first pipeline — EPUB, FB2, HTML, TXT, MD, DOCX parse and write entirely in your browser

Kindle, Reading, and Original presets with greyscale images and font-stripping

Full metadata editor: title, authors, tags, ISO 639 language, cover art

Native Chrome side panel with an offline library backed by IndexedDB — unlimited size

Calibre-powered server pipeline for legacy formats — files are streamed through and deleted immediately, never stored