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[ v1.4.5 | v1.3.11 | v1.5.x | Git | Old Versions ]

Download Source Code and Documentation

We recommend to use the latest stable release FLTK 1.4.5, the first entry in the table below.

Only old software should use 1.3.11, and only very old software may need older versions. These older releases are end of life and may not even compile on new platforms. Try to use 1.4.5, many older apps can use it with little or no change.

If you really want older versions, please use the Download Old Versions page.

For more about FLTK releases and development, see this article on FLTK releases.

- - - Stable Releases - - -
Version Filename Size (Bytes) MD5 Sum
1.4.5 fltk-1.4.5-source.tar.gz 92923938308c6bb9ebc8580807a3834be4fcf54
fltk-1.4.5-source.tar.bz2 8464904bdb6cbc3cecfb5576e3c17e48d593acc
fltk-1.4.5-docs-html.tar.gz 9420890b17cf570539a9d32cdaa3de7adc177f5
fltk-1.4.5-docs-pdf.tar.gz 107948614181c4bf49098f893ddf40d8a1c2e94b
fltk-1.4.5-fluid-docs-html.tar.gz 20078973d5ed1190b713f28686419ff47400ede
fltk-1.4.5-fluid-docs-pdf.tar.gz 17483526e1856c78b2d5c7d3d1fb20069304586
fltk-1.4.5-sha256sums.txt 569ca35c7ea9ecf844c13e09ea117dc79bd
1.3.11 fltk-1.3.11-source.tar.gz 557541175b2fd1aa2433e13abcbb311043eaee0
fltk-1.3.11-source.tar.bz2 47764210e79fa6c4caad1d219b381330f2a0ea2
fltk-1.3.11-docs-html.tar.gz 7568708adc29ba4907774c8b6ad32ec8454e088
fltk-1.3.11-docs-pdf.tar.gz 8458812fe7ef3ca98c3c8d5c37299b7874374b5
fltk-1.3.11-macOS10.11-source.tar.gz 557611652f5b44c34221398e77fa508aab671e4
fltk-1.3.11-sha256sums.txt 47785b86fb68583e8c61da121e37d6e805e
- - - Weekly Development Snapshots - - -
Version Filename Size (Bytes) MD5 Sum
1.5.x fltk-1.5.x-20260626-4a421e3f4c79.tar.bz2 8391070320e134d3f6e29e3beacb02d8b1a12d2
fltk-1.5.x-20260626-4a421e3f4c79.tar.gz 924450704c35227be2f96bb23212c668e80e688

Git Access

The FLTK source code is available to the public via Git. The current active development branch is FLTK 1.5, the latest stable version is 1.4.5.
These can be checked out of Git using the following command:

 git clone https://github.com/fltk/fltk.git
..or browsed with this URL:
 https://github.com/fltk/fltk

For more information on using Git see the Git Quick-Start Guide page.

Developers with write access should consult GitHub docs on how to setup their access and/or read article #1591: Git for FLTK Developers for more information.


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