The table below details the third party libraries that Ghostscript and/or GhostPDL include, the versions QA tested and shipped with our releases, the relevant license, and the "upstream" URL.

Library Name Version Function License URL
(AGPL Release Only)
2.8.0 CUPS raster format output GPL Version 3
eXpat 2.2.9 XML parsing for XPS interpreter MIT/eXpat License
FreeType 2.10.1 Font scaling and rendering for Ghostscript FreeType License
(BSD-style license with a credit clause)
jbig2dec 0.17 JBIG2 decoding for the PDF interpreter Licensed with Ghostscript/GhostPDL
(copyright owned by Artifex)
libjpeg 9c
with patches
JPEG/DCT decoding/encoding "Free"
Can be used in commercial applications without royalty, with acknowledgement.
LittleCMS 2 mt
(lcms2mt – thread save fork of lcms2)
2.9mt ICC profile based color conversion and management MIT LICENSE
libpng 1.6.37 PNG image encoding/decoding. libpng license
classified as "a permissive free software license"
OpenJPEG 2.3.1 JPEG2000 image decoding for the PDF interpreter BSD-style
libtiff 4.1.0 TIFF image encoding/decoding BSD-style
zlib 1.2.11 (De)Flate compression zlib License
classified as "a permissive free software license"

The following are no-cost, open source licensed, but not GPL compatible.
(JPEG XR reference software)
1.8 HDPhoto/JPEG-XR image decoding for the XPS interpreter ITU/ISO/IEC "Free" License
Reference implementation

The following are relevant to Artifex Software commercial releases only.
with patches
Access, scale and render AGFA MicroType fonts Commercial
with patches
ICC profile base color conversion and management MIT LICENSE

Copyright © 2005-2021 Artifex Software, Inc. All rights reserved.

This software is provided AS-IS with no warranty, either express or implied. This software is distributed under license and may not be copied, modified or distributed except as expressly authorized under the terms of that license. Refer to licensing information at or contact Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato, CA 94945, U.S.A., +1(415)492-9861, for further information.

Ghostscript version 9.54.0, 30 March 2021