TXTZ to AZW3 Converter

Convert TXTZ (Zipped text e-book) files to AZW3 online, for free, with nothing to install.

To convert TXTZ to AZW3, select or drop your .txtz file above, check that AZW3 is chosen as the output, and click Convert. This conversion runs on our server, and your files are deleted 72 hours later.

What is a TXTZ file?

TXTZ – Zipped text e-book. TXTZ is a ZIP of a text file and its pictures: a plain e-book that calibre makes and reads.

TXTZ Converter →

What is an AZW3 file?

AZW3 – Kindle e-book (AZW3, KF8). AZW3 (also called KF8) is the Kindle e-book format that replaced MOBI. It supports modern layout and fonts.

AZW3 Converter →

How to convert TXTZ to AZW3

  1. Click Select File, or drop your .txtz files anywhere on this page. You can add several at once.
  2. Check that AZW3 is chosen as the output format. On this page it is picked for you.
  3. Click Convert. When a file has to go to our server, the button says Upload and convert instead.
  4. Click Download next to each file when it's done.

TXTZ vs AZW3: how they compare

TXTZAZW3
LayoutFlowing textFlowing text
EditableYes, in a text editorWith e-book tools
Created bycalibre, 2010Amazon, 2011
Best forPlain text e-books with picturesKindle e-readers

Good to know

  • The TXTZ e-book is converted by calibre. Copy-protected (DRM) e-books cannot be converted: ConvertKitty does not remove DRM, so use books you have bought without it or that are free of it.
  • The AZW3 e-book is made by calibre from the text, headings and pictures of the TXTZ file; a cover is not created.

Frequently asked questions

Is converting TXTZ to AZW3 free?

Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.

Are my TXTZ files uploaded anywhere?

This conversion runs on our server, because reading a TXTZ file needs calibre, which does not run in a browser. Your file is sent over an encrypted connection, and both it and the result are deleted 72 hours after the conversion. The server has no internet access while it works on your file.

How large can the TXTZ file be?

Up to 1 GB per file. This conversion runs on our server, which accepts files up to that size.

Will the AZW3 look the same as the TXTZ?

The text, chapters and pictures are kept. The look can differ: AZW3 readers use their own fonts and page sizes, so page breaks move.

Can I convert several TXTZ files at once?

Yes. Add as many files as you like; they are converted one after another, and each one gets its own Download button.

How long does converting TXTZ to AZW3 take?

In our tests a 4 MB novel of 400 chapters took about 44 seconds to become an AZW3 file. Most books are far smaller and take a few seconds.

Convert TXTZ to other formats

Convert other files to AZW3

All e-book formats

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