MOBI is Amazon's legacy ebook format for Kindle devices. Pre-2022 Kindles support MOBI but not EPUB. Since 2022, Amazon Kindle supports EPUB natively.

How do I convert EPUB to MOBI?

Upload your .epub file and click "Convert to MOBI". Note: check if your Kindle supports EPUB directly before converting.

Does the converter upload my files?

No — conversion is browser-based.

Does my Kindle need MOBI files?

Kindle devices from 2022+ (Kindle Paperwhite 11th gen and newer) support EPUB natively. Pre-2022 devices may need MOBI.

Will the formatting be preserved?

Basic text formatting, chapter structure, and metadata are preserved. Complex formatting may be simplified.

What EPUB versions are supported?

Both EPUB 2 and EPUB 3 are supported as input.

EPUB to MOBI Converter

Convert EPUB ebooks to MOBI format for older Kindle devices. Preserves chapter structure and metadata. Note: modern Kindles (2022+) support EPUB directly.

Last updated: April 2026

scienceBeta feature. MOBI/AZW format support is experimental. DRM-protected files cannot be converted. Results may vary for complex documents.

Drop EPUB files here

or click to select · up to 1 files · max 50 MB each

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Files never leave your device — processed locally in your browser

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What it does

Kindle compatibility

Produces MOBI files compatible with Kindle Paperwhite (pre-2022), Kindle 4th gen and earlier, and Kindle apps.

Chapter structure

EPUB chapters are preserved as separate sections in the MOBI output.

Metadata

Title, author, and description from the EPUB OPF metadata are included in the MOBI.

No upload

EPUB is a ZIP file parsed locally. MOBI output is generated client-side.

How to use EPUB to MOBI Converter

1
Upload EPUB file
Drop your .epub file. Note: only DRM-free EPUB files can be converted.
2
Convert
Click "Convert to MOBI". The converter extracts EPUB chapters and builds the MOBI structure.
3
Download and sideload
Download the .mobi file and transfer it to your Kindle via USB or email to your Kindle email address.

When to use this

Older Kindle compatibility

Pre-2022 Kindles support MOBI but not EPUB. Convert EPUB purchases or downloads to MOBI for older device support.

Sideloading to Kindle apps

The Kindle app for Android and iOS supports MOBI via email-to-Kindle. Convert EPUB to MOBI for this workflow.

Common errors & fixes

MOBI not recognized by Kindle: Ensure the file has a .mobi extension. For newer Kindles (2022+), try the EPUB file directly — Amazon added native EPUB support.
Complex layout not preserved: MOBI supports basic text formatting. Complex EPUB layouts (tables, columns, custom fonts) may be simplified.

Technical details

Input format	EPUB (EPUB 2 and EPUB 3)
Output format	MOBI (Mobipocket)
EPUB parsing	JSZip + DOMParser
Processing location	Browser (client-side only)

What is EPUB?

EPUB is the open ebook standard from the W3C. EPUB files are ZIP archives containing HTML chapters, CSS, images, and metadata. EPUB is supported by Apple Books, Kobo, Google Play Books, and — since 2022 — Amazon Kindle.

What is MOBI?

MOBI (Mobipocket) is Amazon's legacy ebook format, widely used on Kindles before Amazon added native EPUB support. MOBI stores content in a binary format with an HTML-derived content structure. While Amazon now prefers EPUB for new content, MOBI remains compatible with older Kindle devices and the email-to-Kindle sideloading workflow.

Do you actually need MOBI in 2026?

Since Amazon added EPUB support to all Kindle devices (Kindle Paperwhite 11th gen, Kindle 2022, and all Kindle apps) in 2022, most users no longer need to convert EPUB to MOBI. Simply send the EPUB file directly to your Kindle via USB or the Send to Kindle service.

If you have a pre-2022 Kindle device that only supports MOBI, this converter produces a compatible file. But check your Kindle model's generation before converting — you may be able to use the EPUB directly.

Frequently Asked Questions

What is a MOBI file?: MOBI is Amazon's legacy ebook format for Kindle devices. Pre-2022 Kindles support MOBI but not EPUB. Since 2022, Amazon Kindle supports EPUB natively.
How do I convert EPUB to MOBI?: Upload your .epub file and click "Convert to MOBI". Note: check if your Kindle supports EPUB directly before converting.
Is this EPUB to MOBI converter free?: Yes, completely free.
Does the converter upload my files?: No — conversion is browser-based.
Does my Kindle need MOBI files?: Kindle devices from 2022+ (Kindle Paperwhite 11th gen and newer) support EPUB natively. Pre-2022 devices may need MOBI.
Will the formatting be preserved?: Basic text formatting, chapter structure, and metadata are preserved. Complex formatting may be simplified.
What EPUB versions are supported?: Both EPUB 2 and EPUB 3 are supported as input.
Does it work on mobile?: Yes.

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