Free Online Ebook Converter

Convert ebooks between EPUB, MOBI, AZW3, FB2, CBR, CBZ, PDF, and TXT. Read your books on any device.

Quick Answer

Ebook Converter with 30 conversion routes. Convert ebooks between EPUB, MOBI, AZW3, FB2, CBR, CBZ, PDF, and TXT.

30
Conversion Routes
6
Source Formats
Yes
Browser Conversions

All Ebook Conversions

30 conversion routes available — click any to convert instantly

Convert Kindle Format 8

→ Kindle Format 8 to EPUB → Kindle Format 8 to FictionBook → Kindle Format 8 to MOBI → Kindle Format 8 to PDF → Kindle Format 8 to Plain Text

Convert Comic Book RAR

→ Comic Book RAR to Kindle Format 8 → Comic Book RAR to Comic Book ZIP → Comic Book RAR to EPUB → Comic Book RAR to MOBI → Comic Book RAR to PDF

Convert Comic Book ZIP

→ Comic Book ZIP to Kindle Format 8 → Comic Book ZIP to EPUB → Comic Book ZIP to MOBI → Comic Book ZIP to PDF

Convert EPUB

→ EPUB to Kindle Format 8 → EPUB to FictionBook → EPUB to Markdown → EPUB to MOBI → EPUB to PDF → EPUB to Plain Text

Convert FictionBook

→ FictionBook to Kindle Format 8 → FictionBook to EPUB → FictionBook to MOBI → FictionBook to PDF → FictionBook to Plain Text

Convert MOBI

→ MOBI to Kindle Format 8 → MOBI to EPUB → MOBI to FictionBook → MOBI to PDF → MOBI to Plain Text

Frequently Asked Questions

ChangeThisFile supports EPUB, MOBI, AZW3, FB2, CBR, CBZ, PDF, and TXT for ebook conversions. You can convert between most combinations of these formats.

Yes. The EPUB to MOBI converter uses Calibre on the server to produce Kindle-compatible MOBI files. The conversion preserves chapter structure, formatting, images, and metadata. For newer Kindles, you can also convert to AZW3 for better formatting support.

Ebook conversions upload your file to the server for processing with Calibre, a professional ebook management tool. Your file is auto-deleted immediately after conversion. Files are encrypted in transit and never stored or shared.

Yes, but results vary depending on the PDF. PDFs with simple text layouts convert well. PDFs with complex formatting, multiple columns, or heavy graphics may produce EPUB files that need manual cleanup. Scanned PDFs (image-based) will not produce readable EPUB text.

Both are Amazon Kindle formats. MOBI is the older format compatible with all Kindles. AZW3 (KF8) is the newer format that supports richer formatting, better CSS, and HTML5 features. If your Kindle supports AZW3, prefer it over MOBI for better reading quality.

Yes. ChangeThisFile supports converting between CBR (RAR-based comic archives) and CBZ (ZIP-based comic archives), as well as converting them to EPUB, MOBI, AZW3, and PDF. This lets you read comics on any device.

FB2 (FictionBook) is an XML-based ebook format popular in Russia and Eastern Europe. It stores text, formatting, and metadata in a single structured file. ChangeThisFile can convert FB2 to and from EPUB, MOBI, AZW3, PDF, and TXT.

Ebook conversions have a 25MB file size limit (free tier; 500MB on Pro). Most ebooks are well under this — a typical novel in EPUB format is 1-5MB. Comic book archives may be larger due to images.

Yes. The Calibre converter preserves chapter structure, table of contents, and metadata (title, author, cover image) when converting between ebook formats. Some formatting details may render differently between formats.

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