About ConvertToKindle
ConvertToKindle is a free, browser-based tool that helps you prepare EPUB files for reading on Amazon Kindle devices and apps. We built it because getting e-books onto Kindle shouldn't be complicated.
What We Do
ConvertToKindle parses your EPUB files, extracts metadata (title, author, cover image, chapter structure), and lets you review and edit that information before re-packaging the file for optimal Kindle compatibility. The entire process runs in your web browser — your files are never uploaded to any server.
Why We Built This
When Amazon began accepting EPUB files via Send to Kindle in 2022, a major barrier for Kindle users was removed. You no longer need to convert EPUB to MOBI — just send the EPUB directly.
However, many EPUB files found online have messy metadata: incorrect titles, missing authors, or broken cover images. When you send these to Kindle, your library becomes a disorganized mess of "Unknown" entries. ConvertToKindle solves this by giving you a quick way to inspect and fix metadata before sending to your Kindle.
Our Principles
- Privacy first. Your files never leave your device. We use client-side JavaScript and the JSZip library to process everything locally. There are no server uploads, no analytics on your files, and no data collection.
- Free forever. The core tool will always be free. We support the site through unobtrusive advertising.
- Simple and focused. We do one thing well: prepare EPUBs for Kindle. No bloated features, no account requirements, no unnecessary complexity.
- Open standards. We champion EPUB as the universal e-book format and provide educational content to help users understand their options.
Technology
ConvertToKindle is built with:
- Astro — Static site generator for fast page loads
- JSZip — Client-side ZIP library for parsing and re-packaging EPUB files
- Tailwind CSS — Utility-first CSS framework
- Cloudflare Pages — Global CDN hosting for fast delivery worldwide
No server-side processing is involved in file handling. The site is entirely static, with all conversion logic running in your browser's JavaScript engine.
Contact
Have questions, feedback, or suggestions? We'd love to hear from you.
Email: [email protected]
Legal
ConvertToKindle is not affiliated with, endorsed by, or sponsored by Amazon, Kindle, or any Amazon subsidiary. "Kindle" is a trademark of Amazon.com, Inc. EPUB is an open standard maintained by the W3C.