HTMLZ Converter

Convert HTMLZ (Zipped HTML e-book) files online, for free, with nothing to install.

HTMLZ is a ZIP of one HTML file with its pictures and style sheet, an e-book format that calibre makes and reads. HTMLZ files can be saved as PDF, RTF, TXT, EPUB, MOBI, AZW3, LRF, OEB, PDB, on our server.

What is a HTMLZ file?

HTMLZ – Zipped HTML e-book. HTMLZ is a ZIP of one HTML file with its pictures and style sheet, an e-book format that calibre makes and reads.

How to convert a HTMLZ file

  1. Click Select File, or drop your .htmlz files anywhere on this page.
  2. Pick the format you want next to each file, for example PDF.
  3. Click Convert, then Download when it's done.

HTMLZ at a glance

HTMLZ
LayoutFlowing text
EditableYes, in a text editor
Created bycalibre, 2010
Best forPutting an e-book on a web page

Frequently asked questions

What is a HTMLZ file?

HTMLZ is a ZIP of one HTML file with its pictures and style sheet, an e-book format that calibre makes and reads.

How do I open a HTMLZ file?

HTMLZ files open in Calibre; unzip one and its HTML opens in any web browser. To read it anywhere, convert it to EPUB here.

Is converting HTMLZ files 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 HTMLZ files uploaded anywhere?

This conversion runs on our server, because reading a HTMLZ 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.

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