Third-Party Notices and Source
Monstera PDF Editor is built on established open source components. This page lists them with their licences, and links the source for Monstera and for every copyleft component.
Components and licences
| Component | Licence |
|---|---|
| MuPDF | AGPL-3.0-or-later |
| Ghostscript | AGPL-3.0-or-later (a separate program) |
| ONLYOFFICE converter | AGPL-3.0 with the Additional Terms under Section 7 (a separate program) |
| Poppler | GPL-2.0-or-later, used under GPL-3.0 (a separate program) |
| PDFium | BSD-3-Clause and Apache-2.0 |
| PDF.js | Apache-2.0 |
| Tesseract | Apache-2.0 |
| pdf-lib (maintained fork) | MIT |
| zxing-cpp | Apache-2.0 |
| fflate | MIT |
| Electron | MIT |
The Third Party Notices file distributed with Monstera is the authoritative list of third-party components, including the exact versions and complete licence texts. Read the full notices file (opens in a new tab).
Monstera source
Monstera is free software under the GNU Affero General Public License, version 3 or later. The complete source is published at https://github.com/tenslorai-tar/monstera (opens in a new tab).
Source for copyleft components
- MuPDF: github.com/ArtifexSoftware/mupdf-downloads/releases (opens in a new tab)
- Ghostscript: github.com/ArtifexSoftware/ghostpdl-downloads/releases (opens in a new tab)
- Poppler: poppler.freedesktop.org (opens in a new tab)
- ONLYOFFICE: github.com/ONLYOFFICE/core (opens in a new tab)
Missing source is a compliance bug
If any corresponding source is missing, report it to report@monsterapdf.com or on GitHub (opens in a new tab); it is treated as a compliance bug.
The terms page explains how these licences relate to Monstera.