GIMP
GIMP retouches your photos and assembles images with layers, masks and selection tools.
Before settling on a free alternative to Photoshop, you first need to pin down what you actually do with your images. Photo retouching, stylus illustration and the odd quick edit do not call for the same arrangement of tools. This selection gathers GIMP, Krita and Paint.NET so you can weigh up their strengths and plan the right tests. It makes no promise to reproduce every Photoshop feature or to keep every component of a project file created elsewhere. You can settle on a main tool or pick something for one narrow task. Pull together a few examples with their layers, their dimensions and the delivery format you expect. Then run through the whole process, from opening to export, so you judge each alternative on your real work rather than on a passing resemblance of its interface.
3 programs
GIMP retouches your photos and assembles images with layers, masks and selection tools.
GIMP is one route for retouching, selections and compositing images made of layers. Prepare a representative example and check the exported result. Its interface sometimes calls for new habits when you are arriving from Photoshop. Opening an external file does not guarantee that every feature of its original editor is kept.
Krita brings together brushes, layers and frame-by-frame animation for digital drawing.
Krita is especially well suited to exploring an environment for digital painting and illustration. Measure its brushes, tablet behavior and layer handling against the way you work. Its requirements also hinge on the scale of the projects. A creative focus does not mean it is an identical stand-in for every editing or preparation operation found in Photoshop.
Paint.NET retouches and composes images with layers, selections, effects and an action history.
Paint.NET can cover image edits that rely on layers and common adjustments. Keep its usual free download separate from the paid version on the Microsoft Store. Check the Windows and CPU requirements before you install it. It runs under a proprietary license and is no catch-all answer for every Photoshop project or every older machine.
If the job is correcting a photograph or combining several images, look first at GIMP's selections, layers and retouching tools. To paint and illustrate, start instead with the brushes and the workspace in Krita. Paint.NET offers yet another route for image edits built on layers and everyday adjustments. These pointers are not rigid boundaries, but they make it easier to prepare a meaningful test. Pick three operations you carry out often and recreate them in the program you have in mind. The “Image editing” section helps you place these tools among the uses of image editing, while your own sequence of tasks stays the best yardstick for comparing their interfaces.
A file with a familiar extension may hold features the other program does not reproduce in full. With a Photoshop project, do not stop at the fact that an image shows up when you open it. Inspect the layers, the texts, the effects and the other parts the rest of the work relies on. Keep the original file and compare the outcome after you edit and then save or export it. A correct final image may be enough for a publication, whereas a collaborator sometimes expects a document that is still editable. Settle that expectation before you choose your delivery format. That way you avoid approving a migration on the strength of a file's appearance alone, when some of its editing options have shifted.
Canvas size and layer count can move the resources you need. Krita's official requirements cite 4 GB of memory as a minimum and 16 GB as recommended; that still does not promise identical behavior across every illustration. Paint.NET 5.1 calls for a modern setup, in particular Windows 10 version 21H2 or newer, or Windows 11, plus the hardware capabilities the publisher spells out. An approachable interface therefore does not mean it runs on just any older PC. Check too that GIMP is compatible with your system. Then run a project close to your actual production, on the hardware you really use, rather than an empty file or a heavily shrunk image.
GIMP and Krita are open source projects. Paint.NET relies on a different license: its usual download is free, while the copy distributed through the Microsoft Store is paid. So check the source and the channel before assuming a price applies to every available edition. Brushes, fonts, images and extensions you add may also carry conditions of their own. Choosing a program does not hand you rights over those resources by default. If access to the code matters to you, “Open source software for Windows” helps you place that requirement. If your main aim is simply to get a task done without buying the software, focus instead on the features included and the concrete limits of the option you pick.
Start with an image whose steps and expected result you already know. Note the commands to learn and the features that are genuinely absent, without mistaking every relocated control for a feature that has vanished. Keep your originals and plan a verifiable export for the recipients. You can then widen the use to projects whose constraints you understand well. The “Replace paid software” selection carries this approach over to other software families, where formats and habits play a similar part. An alternative becomes worthwhile once it can produce the result you need in your context. It need not take on every feature of software you only use for part of what it can do.
A visual likeness is not enough to decide. GIMP is worth trying for retouching and compositing, Krita for digital painting and Paint.NET for other image changes. Compare your usual operations, the formats and the final export. None of these options should be presented as a complete equivalent of every Photoshop feature.
Do not take it for granted. Supporting a format is no guarantee that every feature used in the original file is preserved. Put your individual layers and elements to the test, then check the result after saving. Keep the originals, especially if someone else has to carry the project on in Photoshop.
Krita is built around digital drawing and painting, which makes it a fitting option for this need. Even so, check your tablet, its driver and the pressure settings in your setup. A trial run with your brushes and a usual canvas is still needed to judge comfort and real behavior.
The usual download of Paint.NET is free, whereas the Microsoft Store version is paid. The program is not open source. These two points concern the distribution channel and the license respectively. Also check the current hardware requirements before choosing it for an old or limited computer.