Convert EPUB to Kindle Format Free

Prepare your EPUB files for Kindle. Validate structure, edit metadata, and download optimized EPUBs ready for Send to Kindle — 100% private, runs in your browser.

Drop EPUB files here or browse

Accepts .epub files · Batch supported

Your files never leave your device — 100% private

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How It Works

Step 1

Upload Your EPUB Files

Drag and drop your .epub files into the converter, or click to browse. Batch upload supported.

Step 2

Review & Edit Metadata

See your book's cover, title, author, and chapter count. Edit metadata to fix titles or author names before sending to Kindle.

Step 3

Download Kindle-Ready EPUB

Download your cleaned EPUB optimized for Amazon's Send to Kindle service. Your original files are never modified.

Why Use ConvertToKindle?

100% Free, No Limits

No premium tier, no watermarks, no daily caps. Process as many EPUB files as you need.

Complete Privacy

Files never leave your device. No server uploads, no cloud processing, no data collection.

Metadata Editing

Fix incorrect titles and author names before sending to Kindle. Keep your library organized.

Works Everywhere

Desktop, tablet, or phone — any modern browser. No app or software installation needed.

Batch Processing

Drop multiple EPUB files at once. Each is parsed and prepared individually for download.

Kindle-Optimized Output

Re-packages your EPUB with proper structure and compression for maximum Kindle compatibility.

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Frequently Asked Questions

Can I send EPUB files directly to my Kindle?
Yes! Since 2022, Amazon's Send to Kindle service accepts EPUB files natively. You no longer need to convert to MOBI or AZW3. Simply email your EPUB to your Kindle address or use the Send to Kindle app.
Is ConvertToKindle free?
Yes, completely free with no limits. There are no premium tiers, no watermarks, and no signup required. Process as many EPUB files as you want.
Are my files safe and private?
Absolutely. Your EPUB files are processed entirely in your browser using JavaScript. No files are ever uploaded to our servers. We literally cannot see your books.
What does this tool actually do to my EPUB?
ConvertToKindle parses your EPUB file, extracts and displays metadata (title, author, cover, chapters), lets you edit that metadata, and then re-packages the EPUB with optimized compression and correct EPUB structure for maximum Kindle compatibility.
Why edit EPUB metadata before sending to Kindle?
Kindle organizes your library by title and author. If your EPUB has incorrect or missing metadata, the book may appear as "Unknown" in your Kindle library. Editing metadata ensures your books are properly organized and easy to find.
Do I still need to convert EPUB to MOBI?
No. Amazon deprecated the MOBI format in 2022. Kindle now natively supports EPUB files through Send to Kindle. MOBI files can no longer be sent via email to your Kindle. Learn more about EPUB vs MOBI.
Can I process multiple files at once?
Yes! You can drag and drop or select multiple EPUB files at once. Each file will be parsed and displayed with its own metadata card, and you can download each individually.
What if my EPUB file fails to parse?
If your file fails to parse, it may be corrupted, DRM-protected, or not a valid EPUB. DRM-protected books purchased from stores cannot be processed by any third-party tool. Try re-downloading the file from the original source.

Related Tools & Guides

EPUB to MOBI

Learn about EPUB to MOBI conversion for older Kindles

Send to Kindle Guide

Step-by-step guide to sending books to your Kindle

About EPUB to Kindle Conversion

EPUB (Electronic Publication) is the most widely used open e-book format. It's supported by virtually every e-reader, reading app, and digital library — with one notable exception: Amazon Kindle historically required its own proprietary formats (MOBI, AZW3, KFX).

That changed in 2022 when Amazon announced that Kindle's Send to Kindle service now accepts EPUB files directly. This means you no longer need to convert EPUB to MOBI or AZW3 — you can send your EPUB files straight to your Kindle device or app.

However, not all EPUB files are created equal. Books with incorrect metadata, missing cover images, or structural issues may not display properly on Kindle. ConvertToKindle helps you validate your EPUB files, review and edit metadata, and re-package the book with optimized compression and proper EPUB structure.

The entire process runs in your browser using JavaScript and the JSZip library. Your book files are never uploaded to any server — they're processed entirely on your device. This means complete privacy for your personal library, and lightning-fast processing regardless of your internet speed.

Whether you're preparing free e-books from Project Gutenberg, DRM-free purchases from indie bookstores, or your own manuscript for personal reading, ConvertToKindle makes it simple to get your EPUB files onto your Kindle in the best possible shape.

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