head to head · open source

koodo-reader vs hammer-editor

koodo-reader has 28,699 GitHub stars, 2,148 forks, 271 open issues and last shipped 2 days ago. hammer-editor has 811 stars, 46 forks, 54 open issues and last shipped yesterday. koodo-reader leads on adoption by 3,439% (28,699 vs 811 stars). koodo-reader is written in JavaScript under AGPL-3.0; hammer-editor is written in Kotlin under MIT. koodo-reader has attracted 7% as many forks as stars, hammer-editor 6%. hammer-editor was the more recently maintained of the two, and both are self-hostable with no licence fee.

Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.

koodo-reader ★ 29K hammer-editor ★ 811 category Content & Publishing

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Side by side

	koodo-reader	hammer-editor
GitHub stars	★ 29K	★ 811
License	AGPL-3.0	MIT
Written in	JavaScript	Kotlin
Last push	2026-11-01	2026-11-02
Forks	⑂ 2.1K	⑂ 46
Self-hosting	Yes	Yes
Data ownership	Your server	Your server

pick koodo-reader if

You weight community size — 29K stars and counting
You want the AGPL-3.0 license terms
Your stack matches JavaScript
You value the larger contributor base for long-term maintenance

full koodo-reader profile →

pick hammer-editor if

You want the hammer-editor feature set and don't need the biggest community
You prefer the MIT license terms
Your stack matches Kotlin
You evaluated both and hammer-editor fits your workflow better

full hammer-editor profile →

About koodo-reader

简体中文 हिंदी Português Indonesian English Türkçe Koodo Reader A cross platform ebook reader Download Preview Roadmap Document Plugins Preview Features Format support: EPUB ( .epub ) PDF ( .pdf ) DRM free Mobipocket ( .mobi ) and Kindle ( .azw3 , .azw ) Plain text ( .txt ) FictionBook ( .fb2 ) Comic book archive ( .cbr , .cbz , .cbt , .cb7 ) Rich text ( .md , .docx ) HyperText ( .html , .xml , .xhtml , .mhtml , .htm ) Platform support: Windows , macOS , Linux , Android , iOS and Web Sync and backup your data with OneDrive , Google Drive , Dropbox , iCloud , MEGA , pCloud , Yandex Disk , Box , FTP , SFTP , WebDAV…

read the full koodo-reader overview →

About hammer-editor

Hammer: A story editor A simple tool for building stories. ![badge kotlin] ![badge platform android] ![badge platform ios] ![badge platform windows] ![badge platform linux] ![badge platform macos] Available on: Windows [![.exe](

read the full hammer-editor overview →

Related comparisons

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Frequently asked questions

Is koodo-reader or hammer-editor more popular?

koodo-reader has 28,699 GitHub stars and hammer-editor has 811. koodo-reader has the larger community by that measure.

Are koodo-reader and hammer-editor free?

Both are open source. koodo-reader is licensed under AGPL-3.0 and hammer-editor under MIT. Neither carries a licence fee.

What is the difference between koodo-reader and hammer-editor?

koodo-reader is written in JavaScript and hammer-editor in Kotlin. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.

Which should I choose, koodo-reader or hammer-editor?

Choose koodo-reader if you want the larger community (28,699 stars) or its AGPL-3.0 licence terms. Choose hammer-editor if its feature set, stack or MIT licence fits better. Both are self-hostable.