Paint.NET is jointly developed at Washington State University with additional help from Microsoft, and is meant to be a free replacement for the MS Paint software that comes with all Windows operating systems.Paint.NET is a photo editor and manipulation software.

Download notes: Alternatively you can download the latest stable version of this software.

The programming language used to create Paint.NET is C#, with GDI+ extensions.

Paint.NET has many of the powerful features that expensive commercial applications have, including the ability to use layers.

This is the second semester that Paint.NET has been a project at Washington State University, and we have the goal of adding as much functionality as expensive commercial applications provide, but of course, for free.

In the spirit of all this freedom, we welcome any suggestions, as well as provide the source code free of charge for anyone who wishes to tinker with it.

What's New:

To install, you can either 1) use the built-in updater from a previous 4.0 build, or 2) use the built-in updater from v3.5.11 if you have “Also check for pre-release (beta) builds”, or 3) download it from the forum at: http://forums.getpaint.net/index.php?/topic/28562-paintnet-40-beta-build-5268/

  • The Line/Curve tool is now back, and the Line and Curve shapes have been removed from the Shapes tool
  • Improved rendering quality of the Line/Curve tool, especially when antialiasing is disabled
  • The rectangle shape now draws using an “inset” brush stroke. This helps prevents blurriness with odd-sized brush widths
  • Shapes tool now lets you commit by clicking outside of the bounding box of the current shape. (you can also start drawing a new shape via clicking and dragging, of course)
  • Improved rendering quality of brush tools when antialiasing is disabled
  • Improved performance of Shapes and Line/Curve tools on most systems (e.g., less than 8 CPU cores)
  • Improved rendering quality of Image->Resize when using Nearest Neighbor
  • Fixed the Palette chooser in the Colors window, which was going away when you tried to move the mouse to click on one of its items
  • Fixed some broken clipping when using Paste and “Expand Canvas”
  • Intel-based GPUs now default to having hardware acceleration disabled. You may still force it to be enabled from the Settings dialog.
  • When pasting, the PNG format now has a higher priority than CF_DIB, which allows easier access to transparency (alpha) from other applications
  • Tools no longer incorrectly commit when clicking on the currently active layer in the Layers window
  • The layer’s opacity was being ignored while drawing if it was the lowest (index zero) layer
  • You can now copy a file from File Explorer and Paste it into Paint.NET (regression from 3.5)
  • Fixed the canvas scroll bars occasionally being incorrect after maximizing the main window and then restoring it
  • Fixed radio button group tab processing
  • Fixed many small miscellaneous crashes
  • New language: Czech