PaintTool SAI

PaintTool SAI
Other namesSYSTEMAX Advanced Illustrator
Developer(s)Koji Komatsu
Initial release1.0.0 / February 25, 2008 (2008-02-25)
Stable release
1.2.5 / April 25, 2016 (2016-04-25)
Preview release
2 Beta / November 23, 2024 (2024-11-23)
Written inC++
Operating systemMicrosoft Windows
Size2.9 MB
Available inJapanese, Spanish, German
TypeRaster graphics editor
LicenseShareware (31-day trial)
Websitesystemax.jp/en/sai/

PaintTool SAI or Easy Paint Tool SAI (ペイントツールSAI) is a lightweight raster graphics editor and painting software for Microsoft Windows developed by Koji Komatsu (小松 浩司, Komatsu Kōji) and published by Systemax. The prototype of the software was "Full Color Paint Tool -Sai-" (フルカラーペイントツール-彩-, Furukarā peinto tsūru -Sai-) for X68000, produced in October 1996; Development of the software began on August 2, 2004, with an alpha version released on October 13, 2006, a beta version on December 21, 2007, and a commercial version (1.0.0) on February 25, 2008. It has been available on Microsoft Windows from XP to 11. A version 2 is currently in development.