Photo Editors
A freeware photo editor can replace paid software for almost everything except niche professional workflows. The picks below split into two camps: editors that change images (GIMP, Paint.NET, Krita, darktable) and viewers that open them instantly (IrfanView, XnView MP).
Find your next favourite
Editors
GIMP: the Photoshop alternative
Layers, masks, curves, plugins: GIMP is the full raster editor and the closest freeware equivalent to Photoshop. The learning curve is real, the price is permanent: free, open source, no account.
Paint.NET: the friendly middle ground
Faster to learn than GIMP, stronger than built-in editors: layers, effects, a huge plugin community. Windows-only freeware that has stayed free since 2004, financed by donations.
Krita: built for drawing
Krita is a digital painting program first: brushes, stabilizers, animation timeline. If you draw rather than retouch, it beats every free alternative and most paid ones.
darktable: the RAW developer
darktable processes camera RAW files with non-destructive editing and professional color tools. The open source counterpart to Lightroom, with an equally steep initial climb.
Viewers
IrfanView: instant and tiny
Opens virtually any image format in milliseconds, batch-converts, plays video files in a pinch. Windows freeware with a legendary reputation; plugins extend it to 70+ formats.
XnView MP: the cross-platform organizer
XnView MP adds browsing, tagging and format conversion across Windows, macOS and Linux. The freeware alternative to paid asset organizers.
Good to know
What is the best free photo editor?
GIMP for full editing power, Paint.NET for everyday Windows edits, Krita for drawing. All three are free with no trial limits.
Is there a free Lightroom alternative?
darktable for RAW development, with non-destructive workflow and professional color tools on Windows, macOS and Linux.
What is the fastest free image viewer?
IrfanView on Windows; XnView MP on macOS and Linux. Both open files instantly and batch-convert.