Skip to main content
Convert999
フォーマットすべての変換ツール比較活用事例ToolsBlog
変換ツール
Convert999

400以上の形式をサポートする無料オンラインファイル変換ツール。

製品

  • すべての変換ツール
  • フォーマット
  • 比較
  • 活用事例
  • Tools

リソース

  • 概要
  • Blog
  • Security
  • Glossary
  • Statistics
  • Changelog
  • Contact

法的情報

  • プライバシーポリシー
  • 利用規約

© 2026 Convert999. All rights reserved.

Made with for the web

HomeConvertConvert to MOBI

Convert to MOBI

Convert any file to Mobipocket eBook format — free, fast, and private

電子書籍
ファイルを選択

またはファイルをここにドラッグ＆ドロップ

最大ファイルサイズ：2GB

ファイルはブラウザ内でローカルに処理されます。サーバーにアップロードされません。

About MOBI Format

Mobipocket eBook (.mobi)

MOBI is Amazon's legacy eBook format, originally created by Mobipocket and acquired by Amazon for Kindle devices. MOBI supports basic text formatting, images, tables, and bookmarks. While Amazon has transitioned to newer formats (KF8/AZW3), MOBI remains compatible with all Kindle devices and apps. MOBI files are limited compared to EPUB: they don't support video, advanced CSS, or the latest accessibility features. For publishing on Amazon, authors typically upload EPUB or DOCX files, which Amazon converts to its internal format. Converting MOBI to EPUB provides access to a wider range of e-readers and more modern features.

Convert to MOBI from any format

Choose a source format below to convert to Mobipocket eBook

EPUBMOBIAZWMOBIAZW3MOBIFB2MOBILITMOBILRFMOBIPDBMOBITCRMOBIDJVUMOBICBZMOBICBRMOBI

Frequently Asked Questions

How do I convert files to MOBI?
Simply upload your file using the converter above, select MOBI as the output format, and click convert. The conversion happens instantly in your browser — no uploads needed.
What file formats can be converted to MOBI?
You can convert 11+ formats to MOBI, including EPUB, AZW, AZW3, FB2, LIT and more. Browse the full list of supported source formats above.
Is converting to MOBI free?
Yes, Convert999 is 100% free with no limits. Convert as many files to MOBI as you need — no registration, no watermarks, no hidden fees.
Is my data safe when converting to MOBI?
Absolutely. All conversions happen locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

Explore MOBI

MOBI Converter

Convert from MOBI

MOBI Format

About Mobipocket eBook

File Tools

Compress, resize, merge

Format Glossary

Learn about formats

Other Popular Conversions

.pdfConvert to PDF.docConvert to DOC.docxConvert to DOCX.odtConvert to ODT.rtfConvert to RTF.txtConvert to TXT.htmlConvert to HTML.htmConvert to HTM.mdConvert to MD.texConvert to TEX