Top 20 Alternatives to FastStone Image Viewer in Free Image Editing Software

Powerful open‑source raster editor with advanced tools for retouching, compositing, and graphic design.

Lightweight Windows‑only editor offering layers, effects, and a simple UI for quick edits.

Professional‑grade digital painting app that also handles photo editing and supports HDR.

Vector graphics editor that can be used for illustration, logo design, and basic raster image tweaks.

Online Photoshop‑compatible editor that works directly in the browser; supports PSD, XCF, and Sketch files.

Web‑based photo editor with AI tools, filters, and layer support; ideal for quick adjustments.

Open‑source photography workflow application for RAW development and non‑destructive editing.

High‑performance RAW processor offering extensive color and detail controls.

Free, non‑destructive RAW editor focused on zone‑based editing and batch processing.

Simple drawing and image‑editing program modeled after Paint.NET, available for Windows, macOS, and Linux.

Mac‑only open‑source image editor built on Cocoa, offering layers, gradients, and filters.

Feature‑rich Linux image editor with batch processing, RAW support, and a wide array of filters.

Cross‑platform media browser and editor supporting over 500 image formats with basic editing tools.

Fast Windows viewer with simple editing functions (crop, resize, color correction) and extensive plugin support.

All‑in‑one photo editor offering collage, batch editing, GIF creation, and a suite of filters.

Modern editor with AI‑enhanced filters, facial retouching, and batch processing; free tier available.

Web‑based design tool with drag‑and‑drop editing, templates, and basic photo adjustments.

Online photo editor offering HDR effects, beauty retouching, and collage creation.

Google’s mobile photo editor with professional‑grade tools, RAW support, and AI enhancements.

Browser‑based graphics editor with layers, brushes, and filters; free tier includes core features.