Download calibre-zen

Version 0.1.0 · on calibre 9.14.0 · Sep 19, 2026

Windows

macOS

Linux

Run in a terminal from the folder where you want the app:

curl -fL https://raw.githubusercontent.com/purplecandy/calibre-zen/zen/packaging/linux/install-zen.sh -o install-zen.sh && sh install-zen.sh --latest && ./calibre-zen/calibre-zen --version

Or download an archive below and install it manually.

Source

Windows packages are not code-signed yet, so SmartScreen will ask you to confirm: More info → Run anyway. Every file has a checksum beside it on the release page.

calibre-zenhome

Last updated

Terms of use

calibre-zen is free software under the GPL v3, given to you at no charge and with no warranty. These terms say what that means in practice.

The short version

calibre-zen is free, in both senses: it costs nothing and you may use, study, change and share it. It is also unwarranted — it is maintained by one person in their spare time, and you run it at your own risk. Keep backups of your library.

Your licence is the GPL

calibre-zen is licensed under the GNU General Public License, version 3, the same licence as calibre. That licence, not this page, governs what you may do with the software. Nothing here reduces the freedoms the GPL grants you, and if anything on this page appears to conflict with the GPL, the GPL wins.

The complete source code, including every change this fork makes, is at github.com/purplecandy/calibre-zen.

What you may do

  • Use calibre-zen for any purpose, personal or commercial, on as many machines as you like.
  • Install it alongside calibre. It keeps its own settings and does not modify a calibre installation.
  • Modify it and redistribute your version, under the GPL's conditions — which include passing on the source and the same licence.

There is no fee, no licence key and no account, so there is nothing to subscribe to, expire or cancel.

No warranty, no liability

This restates sections 15 and 16 of the GPL, which apply in full: the software is provided “as is”, without warranty of any kind, express or implied, including the warranties of merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the software is with you. To the extent permitted by law, no contributor is liable for any damages arising from the use or inability to use the software, including loss of data.

Read that as practical advice as well as a legal notice. calibre-zen rebuilds large parts of calibre's interface, so it can have bugs calibre does not. Back up your library before doing anything destructive to it.

The content you manage is your responsibility

calibre-zen is a tool for organising files you already have. You are responsible for having the right to hold and convert them, and for complying with the copyright law that applies where you are. calibre-zen ships nothing that removes or circumvents DRM.

Third parties

Metadata sources, bookstores, news publishers and third-party plugins have their own terms and privacy policies, and we are not a party to your use of them. If you obtained calibre-zen from an app store or package repository, that distributor's terms also cover the download itself.

Not affiliated with calibre

calibre-zen is an independent fork. It is not affiliated with, endorsed by or supported by calibre or Kovid Goyal, and calibre's name is used here only to say accurately what calibre-zen is derived from. Please do not report calibre-zen bugs to calibre.

Support

Support is best-effort and public: open an issue on the issue tracker. There is no service level, response time or guarantee that any particular bug is fixed or any feature built.

Changes and governing law

These terms may change; the date at the top of the page is the version in force, and continuing to use calibre-zen after a change means accepting it. To the extent these terms are enforceable at all alongside the GPL, they are governed by the laws of India.

Questions go to nadeem@kibibyte.in. See also the privacy policy.