Open-source licenses
PDFGrove is built on open-source software. The components below, and their licenses, are listed here in accordance with their terms.
| Component | Use | License |
|---|---|---|
| pdf-lib | PDF creation & editing | MIT |
| pdf.js | In-browser PDF rendering | Apache-2.0 |
| qpdf | Password protect / unlock | Apache-2.0 |
| Ghostscript | PDF compression | AGPL-3.0 |
| Express, Multer, JSZip, etc. | Server & utilities | MIT |
Ghostscript (AGPL-3.0)
The Compress PDF tool uses Ghostscript, which is distributed under the GNU Affero General Public License, version 3. Ghostscript is invoked as a separate, unmodified process.
In accordance with the AGPL, the complete corresponding source code for the version of Ghostscript used here is available from the official repository: cgit.ghostscript.com (and a copy of the exact version we run is mirrored at the link in our deployment notes). The full license text is available from the Free Software Foundation.
If you would like the corresponding source for the Ghostscript build running on this service, contact us and we will provide it.
See OPEN_SOURCE.md in the project for full attribution and the AGPL compliance checklist.