ART

Overview

ART is a free, open-source raw photo processor for Linux, macOS and Windows, built from RawTherapee with a simpler interface and substantial processing controls. It suits photographers who want detailed local edits and format flexibility without a subscription. Its main trade-off is that AI masking and denoising depend on separate tools rather than being built into ART.

Key features

ART handles RAW files and includes layer editing, masking and batch editing, giving photographers room to make detailed changes and apply edits across multiple images. Local adjustments can use drawn or parametric masks, so edits can be targeted rather than applied uniformly across a frame.

Metadata handling includes optional XMP sidecar reading and writing. A plugin system supports custom input and output formats, including true HDR output, while color workflows can use ACES CLF LUTs through OpenColorIO and CTL scripts through the ACES CTL interpreter. That breadth is valuable for specialized color workflows, though it may be more than a casual editor needs.

An automatic perspective correction tool adapted from darktable addresses converging lines and similar framing issues. ART can also call external programs through user commands. Its documented AI masking and denoising workflows rely on separate open-source tools, and full integration of AI tools is unlikely in the foreseeable future; users who want an all-in-one AI editor should look elsewhere.

Pricing

ART costs nothing. Its free plan provides the open-source raw-processing program under GPLv3, with no free trial because there is no paid plan to trial. That makes it a straightforward choice for photographers willing to work with desktop software and, for AI workflows, configure separate tools. The project provides no warranty.

Platforms

ART runs on Linux, macOS and Windows. Stable binaries are linked from GitHub releases; the downloads page also lists third-party Windows, openSUSE and Arch Linux builds, as well as notarized macOS builds. The breadth is useful for mixed-platform households, though some download options come from third parties.

Who it's for

Choose ART if you want a free RAW workflow with local masking, batch editing and specialist color or format options across desktop platforms. Its developer-led open-source project aims to serve a wider audience, but photographers seeking simpler camera-vendor software, built-in AI tools or a warranty-backed product may prefer another option.

Pros and cons

• Pro: Drawn and parametric local masks support targeted edits without limiting users to global adjustments.
• Pro: Plugin-based format support, true HDR output and ACES tools serve workflows that need more than basic RAW conversion.
• Pro: Linux, macOS and Windows support keeps the same free workflow available across major desktop platforms.
• Con: AI masking and denoising require separate open-source tools and user-command setup, rather than an integrated AI workflow.
• Con: No warranty means users should be comfortable relying on a community issue tracker and discussion board for questions and bug reports.

Alternatives

darktable is another free, open-source RAW workflow application for Linux, macOS and Windows; compare it if you want a different open-source workflow. RawTherapee is the upstream free, GPLv3 raw processor; it may suit readers who prefer that project directly, though it lacks digital asset management, printing and uploading features.

vkdt is a free, open-source photography workflow toolbox for the same three desktop platforms. Nikon NX Studio is free for macOS and Windows, with Nikon camera and file-format support varying. dcraw is free for all uses on Linux and Windows.

FUJIFILM X RAW STUDIO is a free macOS and Windows download that requires a compatible FUJIFILM camera connected by USB. Hasselblad Phocus is free RAW processing software for Mac and PC. OM Workspace is a free macOS and Windows download for camera users, with a camera serial number required.

For broader comparisons, browse RAW Photo Processing Software and Photo Editing Software.

Verdict

ART is a strong fit for photographers who want free, cross-platform RAW processing with serious local-editing and color-workflow options. Its breadth is the reason to choose it; the need to assemble external AI tools, coupled with the absence of a warranty, is the reason to look elsewhere.