It provides a comprehensive photo editor in a 12 MB download. It runs on any Windows machine (XP through Win 10) and it does not require installation. Feel free to run it from a USB stick or portable drive.

PhotoDemon is completely open-source and available under a permissive BSD license. Contributors have translated the program into more than twenty languages.

New contributions from coders, designers, translators, and enthusiasts are always welcome.

• For information on the latest stable release, visit http://photodemon.org
• To download the program's source code, visit https://github.com/tannerhelland/PhotoDemon
• To download a nightly build of the latest source code, visit http://photodemon.org/downloads/nightly/PhotoDemon_nightly.zip

No installer is provided or required. Aside from a temporary folder – which you can specify from the Tools > Options menu – it leaves no trace on your hard drive. Many users run PhotoDemon from a USB stick or portable drive.

Complex editing actions can be recorded as macros (similar to Office software). A built-in batch processor lets you apply your macros to entire folders of images.

Many open-source photo editors are usability nightmares. PhotoDemon tries not to be. Small touches like save/load presets on all tools, unlimited Undo/Redo, "Fade last action", keyboard accelerators, effect previews, mouse wheel and X-button support, and descriptive menu icons make it fast and easy to use.

• Extensive file format support, including all major RAW formats
• Color-managed workflow, including full support for embedded ICC profiles
• Non-destructive editing for select features, including resizing, rotation, and common adjustments
• 2D transformations: advanced rescale operators (Sinc, Catmull-Rom, etc), content-aware scaling (seam carving), crop, straighten, shear, zoom
• Adjustment tools: levels, curves, HDR, white balance, split-toning, green screen, Wratten filters, and many more
• Filters and effects: perspective correction, edge detection, noise removal, content-aware blur, unsharp masking, lens diffraction, vignetting, and many more
• Some ~200 tools are provided in the current build.

• PhotoDemon isn't designed for OSes other than Microsoft Windows. A compatibility layer like Wine (http://www.winehq.org/) may allow it to work on OSX, Linux, or BSD systems, but program stability and performance may suffer.

PhotoDemon is maintained by a single individual with a family to support. If you would like to make a small donation to support ongoing development, please visit:

http://photodemon.org/donate/

A full list of (wonderful!) contributors is available in AUTHORS.md.

PhotoDemon is BSD-licensed. This allows you to use its source code in any application, commercial or otherwise, if you supply proper attribution. Proper attribution includes a notice of copyright and disclaimer of warranty.

PhotoDemon uses some 3rd-party libraries. These libraries are found in the /App/PhotoDemon/Plugins folder. These libraries have their own licenses, separate from PhotoDemon.

Full licensing details are available in LICENSE.md.