LIBPNG (original) (raw)

[DOWNLOAD]

This is an open source project to develop and maintain the reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files.

UPDATE 2025-Jul-03:

• The latest released version is
  • libpng-1.6.50
    [DOWNLOAD from SourceForge]
• For legacy applications,
  • libpng-1.7.0beta90
  • libpng-1.5.30
  • libpng-1.4.22
  • libpng-1.2.59
  • libpng-1.0.68
    are also available, but ARE NO LONGER UPDATED.

The primary web site for PNG iswww.libpng.org/pub/png.

The primary public ftp site for libpng is
ftp://ftp-osl.osuosl.org/pub/libpng/src.
This site will also respond to https and http requests:
https://ftp-osl.osuosl.org/pub/libpng/src
http://ftp-osl.osuosl.org/pub/libpng/src
Thanks to the Oregon State University Open Source Laboratory.

The previous ftp site is still being maintained atftp://ftp.simplesystems.org/pub/png, but the OSUOSL site is much faster and has a more complete archive of old versions.

The ftp site for beta versions of libpng is also atftp://ftp-osl.osuosl.org/pub/libpng/src/beta.

The current public and beta versions of libpng are also available athttps://sourceforge.net/project/showfiles.php?group_id=5624.

There are pointers to various distributions of libpng and SHA checksumshere.

You can receive notifications of libpng releases through release-monitoring.org, atrelease-monitoring.org/projects/search/?pattern=libpng.

The Sourceforge project page for libpng is athttps://sourceforge.net/projects/libpng/.

A Git repository for libpng is available. You can access it at GitHub (github.com/pnggroup/libpng) or at SourceForge (sourceforge.net/p/libpng/code). At present, there are eight branches:

• master (actively developed)
• libpng16 (equivalent to master)
• libpng17 (frozen, last updated on 2017-Sep-03)
• libpng15 (frozen, last updated on 2017-Sep-28)
• libpng14 (frozen, last updated on 2017-Sep-28)
• libpng12 (frozen, last updated on 2017-Sep-28)
• libpng10 (frozen, last updated on 2017-Aug-24)
• libpng00 (frozen, last updated on 1998-Mar-08)

Starting from version 1.6.42 onwards, the release tags are GPG-signed. The public signature key is available here:github.com/ctruta.gpg.

A Doxygen index for various releases is available atfossies.org/libpng.

An ABI compatibility analysis of libpng releases is available atabi-laboratory.

A Coverity project for libpng is athttps://scan.coverity.com/projects/4061. The project is set up to scan the head of each of the libpng10 through libpng17 branches;libpng00 is not included.

The mailing list for libpng developers and developers of libpng-based applications is png-mng-implement (at) lists.sourceforge.net. Visithttp://png-mng.sourceforge.net/pub/png/pngmisc.html#lists to subscribe.(archived here).

Bug reports can be sent to the mailing list or submitted via the SourceForgeBug tracker(select the "Create Ticket" button) or as an issue atGitHub.

If you wish to privately report a security issue (vulnerability) in libpng, please report it by email to png-mng-security at lists.osuosl.org, where it will be seen by a small group of long-time libpng contributors. You don't need to subscribe (in fact you probably won't be allowed to subscribe) to that list.

Feel free to download and use the official PNG logo (size 88x31) with your application documentation and web pages: