The best alternative to Paint.NET is Krita, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Paint.NET and many of them are so hopefully you can find a suitable replacement. Other interesting alternatives to Paint.NET are Photopea, LazPaint, PixiEditor and miniPaint.
Free, open-source painting software designed by artists for artists. Offers customizable UI, 9 brush engines, color management, tablet support, non-destructive editing, and privacy features. Portable and available on major platforms, supporting seamless texture creation.
Browser-based image editing supports PSD, XCF, Sketch formats, advanced layers, vector tools, RAW photo support, and exports in 40+ formats. Fully client-side with AI background removal, content-aware tools, and privacy as files never leave your device.
Raster & vector graphic editor with many tools and filters, written in Lazarus. Portable, 32bit & 64bit versions, ORA format & 16384x16384 image support. In app 3D import & rendering.
Create pixel-perfect sprites, raster paintings, and scalable vector graphics with a unified open-source editor featuring frame-by-frame animation, a node-based workflow, custom shaders, procedural art tools, anti-aliased brushes, and versatile export options.
miniPaint is free online image editor using HTML5. Edit, adjust your images, add effects online in your browser without installing anything. You can use the Electron based version of the editor if you like.
PhotoFiltre 7 is a complete image retouching program. It allows you to do simple or advanced adjustments to an image and apply a vast range of filters on it. It is simple and intuitive to use, and has an easy learning curve.
Open source image editor with non-destructive editing, 110+ filters, adjustment and text layers, support for smart objects and adjustment layers, cross-platform compatibility, and layer-based editing for flexible image composition.
Pocket Paint is a paint editor that, among others, allows setting parts of pictures to transparent and zooming up to pixel level.
KolourPaint is a simple painting program to quickly create raster images. It is useful as a touch-up tool and for simple image editing tasks.
Artweaver is a simple Freeware program for creative painting, i.e. Artweaver offers you all artistic effects which you need for your work.
You can use it to view your photographs and improve them. Showfoto is the standalone image editor of the digiKam project.
Netherlands
EU
Czechia
France
Poland
Lithuania
Hungary
Austria
Germany
There isn't anything else exactly like paint.net, but Krita comes the closest in terms of features and ease of use. It's relatively intuitive, has various customization options, and is sufficient for basic photo editing and more advanced image manipulation and drawing.