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Article #2042: FLTK 1.4.5 released on April 25, 2026

Created at 09:34 Apr 25, 2026 by AlbrechtS

Last modified at 09:58 Apr 25, 2026

We are pleased to announce the release of FLTK 1.4.5.

This is a maintenance release with many bug fixes and improvements. Its ABI and API are 100% backwards compatible with FLTK 1.4.0 and all previous 1.4.x releases. We recommend all users of FLTK 1.3.x and previous 1.4 releases to upgrade to FLTK 1.4.5.

Documentation for this release in HTML and PDF can be found at the links below [1].

For details (changelog) please see CHANGES.txt [5] and the GitHub "Releases" page [3].

Since FLTK 1.4.1 FLTK releases are exclusively hosted on GitHub [3]. Links to all releases can be found on FLTK's download page [4] as usual, or you can go directly to the GitHub "Releases" page [3] for recent releases.

Future Development

The current development branch for FLTK 1.5 on GitHub [2] is `master`. FLTK 1.4 is in maintenance mode and will get only serious bug fixes in git branch `branch-1.4`.

Links

[1] https://www.fltk.org/doc-1.4/ (HTML)
    https://www.fltk.org/doc-1.4/fltk.pdf (PDF)
[2] https://github.com/fltk/fltk.git
[3] https://github.com/fltk/fltk/releases/
[4] https://www.fltk.org/software.php
[5] https://raw.githubusercontent.com/fltk/fltk/refs/tags/release-1.4.5/CHANGES.txt


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