# Koreader (open-source PDF tool)

> Koreader is a free, open-source PDF tool for macOS and Linux. An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices. It has 30,153 GitHub stars and is released under the AGPL-3.0 license.

Please check the user guide and the [wiki][link-wiki] to discover more features and to help us document them. Please follow the model specific steps for your device:

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/koreader/koreader |
| Platforms | Linux, macOS |
| Interface | desktop GUI |
| GitHub stars | 30,153 |
| License | AGPL-3.0 (open source) |
| Replaces | n/a |
| Language | Lua |
| Website | none listed |
| Official | no |
| Category | PDF editors & tools |
| Latest release | v2026.07.1 (Aug 1, 2026) |
| Last commit | Oct 7, 2026 |

## Install

Download a build for your system from the project's releases (https://github.com/koreader/koreader/releases) or website, or build it from source by following the README.

## Similar desktop apps

- [Stirling-PDF](https://appsgit.com/desktop-apps/stirling-pdf): #1 PDF Application on GitHub that lets you edit PDFs on any device anywhere. (93,752 stars, MIT, official)
- [Tesseract OCR](https://appsgit.com/desktop-apps/tesseract-ocr): Tesseract Open Source OCR Engine (main repository). (76,855 stars, Apache-2.0, official)
- [OCRmyPDF](https://appsgit.com/desktop-apps/ocrmypdf): OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched. (34,952 stars, MPL-2.0, official)
- [SumatraPDF](https://appsgit.com/desktop-apps/sumatrapdf): SumatraPDF is a multi-format (PDF, EPUB, MOBI, CBZ, CBR, FB2, CHM, XPS, DjVu) reader for Windows under (A)GPLv3 license, with some code under BSD license (see AUTHORS). (17,717 stars, GPL-3.0, official)
- [Xournal++](https://appsgit.com/desktop-apps/xournal): Xournal++ is a handwriting notetaking software with PDF annotation support. (15,482 stars, GPL-2.0, official)
- [Rnote](https://appsgit.com/desktop-apps/rnote): Sketch and take handwritten notes. (11,735 stars, GPL-3.0)

---

Canonical page: https://appsgit.com/desktop-apps/koreader
Source: appsgit (https://appsgit.com), the app store for github. Data from the GitHub API, refreshed nightly.
Machine access: JSON API https://appsgit.com/api/v1/apps (OpenAPI: https://appsgit.com/openapi.json), MCP server https://mcp.appsgit.com/mcp, full index https://appsgit.com/llms-full.txt.