ODT to MOBI Converter

ODT to MOBI vs EPUB — Which Should You Convert To?

You have an OpenDocument Text file (.odt) from LibreOffice or Apache OpenOffice Writer and you want to read it on a Kindle. The short answer: if your Kindle is from 2018 or earlier and you load books over USB, MOBI is the format it reads — convert ODT to EPUB only if your device is newer or you use Amazon's Send to Kindle. The catch worth knowing before you pick: Amazon retired MOBI from its cloud delivery service, so MOBI is now a legacy sideload format rather than the default Kindle target it once was.

Side-by-side Comparison

When to Pick MOBI

• Your Kindle predates 2018. The Kindle Keyboard, Touch, Paperwhite 1–3, Voyage, and Oasis 1–2 never received the late-2022 firmware that reads EPUB off USB. MOBI is the only sideload format they open cleanly.
• You maintain a MOBI library in Calibre or a self-hosted catalogue. Many collections built before 2022 keep MOBI as the canonical Kindle target because every Kindle in the house reads it.
• You load books over USB, not wirelessly. Sideloading a .mobi into the documents/ folder still works on all Kindle hardware, regardless of Amazon's cloud-delivery changes.
• A tool in your workflow specifically expects .mobi. Some older Kindle apps and review pipelines still ingest MOBI when files are added through file-sharing.

When to Pick EPUB

• Your Kindle is a Paperwhite 4 (2018) or newer. These run firmware 5.14.2+ and read EPUB directly — there's no reason to drop to the older format. Use ODT to EPUB instead.
• You want to send the book wirelessly. Send to Kindle (web, app, or your @kindle.com address) accepts EPUB and no longer accepts MOBI, so EPUB is the only format that reaches your device over the air.
• You read on anything other than a Kindle. Apple Books, Kobo, Google Play Books, Nook, and Calibre all open EPUB; MOBI is a Kindle-only format.
• You want the better-looking ebook. EPUB supports embedded fonts and modern CSS that MOBI's older typography engine can't render.

How to Convert ODT to MOBI

1. Upload Your ODT File: Drag and drop your .odt onto the page, or click "+ Add Files" to browse. You can queue several ODT files and convert them in one batch.
2. Keep the Optimized Defaults: This conversion exposes no required settings under Advanced Options — the defaults are tuned to map your document's headings and styles into a valid, reflowable MOBI with a navigable table of contents.
3. Tidy the Source for a Cleaner Ebook (Optional): Before uploading, apply Writer's real Heading 1 / Heading 2 paragraph styles to your chapter titles; the converter builds the MOBI's chapter navigation from those styles, not from text that merely looks bold.
4. Convert and Download: Click "Convert" and save your .mobi, then copy it to a Kindle over USB. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.

Starting from a different source, or want the modern Kindle target? See DOCX to MOBI for Word documents, ODT to EPUB for current Kindles and other readers, or ODT to PDF when you need the exact printed page layout instead.

Frequently Asked Questions

Is MOBI or EPUB better for sending an ODT to my Kindle?

It depends on the Kindle. For any Kindle from 2018 onward (Paperwhite 4 and later, on firmware 5.14.2+), EPUB is better — those devices read it natively and Amazon's Send to Kindle accepts it. For a Kindle made before 2018, EPUB will not open off USB, so MOBI is the format that works. MOBI is the legacy choice; pick it only when your hardware or library specifically needs it.

Can I still send a MOBI file to my Kindle wirelessly?

No. Amazon began winding down MOBI support in its Send to Kindle service on November 1, 2023 and fully stopped accepting .mobi (and the related .azw and .prc files) on December 20, 2023. MOBI files already on your Kindle keep working, and you can still copy a new MOBI onto the device over USB — but for wireless or email delivery of a new title you need EPUB.

Will my ODT's page layout and page numbers survive in the MOBI?

No. MOBI is a reflowable ebook format with no fixed pages, so text re-wraps to each device's screen and font size. Headers, footers, page numbers, multi-column sections, and exact page breaks from your Writer document are dropped or flattened during conversion. Body text, headings, lists, bold and italic, hyperlinks, and embedded images carry across. If you need the printed page preserved exactly, convert to ODT to PDF instead.

How does the converter build the ebook's table of contents?

It reads the paragraph styles in your ODT. Chapter titles styled with Writer's Heading 1, Heading 2, and so on become entries in the MOBI's navigation index, which is what Kindle uses for chapter jumps. Text that is merely enlarged and bolded is treated as an ordinary paragraph and produces no navigation entry — so apply real heading styles before converting.

What does and doesn't carry over cleanly from Writer?

In our testing, body text, headings, basic bulleted and numbered lists, bold/italic, inline images, and hyperlinks convert cleanly, and a heading-styled ODT produces a MOBI with a tappable chapter list. What breaks or simplifies: multi-column page layouts, text in fixed-position frames, complex tables, footnotes anchored to a printed page, and any precise spacing — these are print-layout constructs with no equivalent in a reflowable ebook, so re-anchor images "as character" and flatten columns in Writer before converting.

What is ODT, and why convert it to an ebook format at all?

ODT is OpenDocument Text, the word-processing format of the OASIS OpenDocument standard (also published as ISO/IEC 26300) and the native format of LibreOffice and Apache OpenOffice Writer. It's a ZIP-based package of XML files describing your document's content and styles. It's a great editing format but Kindles don't read it, so to load an ODT manuscript onto an e-reader you convert it to an ebook format — MOBI for older Kindle hardware, or EPUB for current devices and other readers.

How are my files handled after I convert?

Your ODT is uploaded over an encrypted connection, converted on our servers, and the files are deleted automatically a few hours after conversion. There's no sign-up, no watermark on the output, and your documents are never shared or made public.