RawTherapee

RawTherapee is a free desktop raw developer for photographers who want control over image processing across Linux, macOS and Windows. It suits enthusiasts prepared to work with detailed development controls as well as professionals who need a dedicated raw-processing tool. Its strength is focused, non-destructive development; it is not a complete photo-library or output workflow.

Overview

RawTherapee processes raw files from a broad range of digital cameras, including HDR DNG, and also supports JPEG, TIFF and PNG. Its 32-bit floating-point engine keeps development non-destructive, which is useful when you want to revisit adjustments without changing the source image.

The project dates to 2004 and releases the software as libre software under the GNU General Public License version 3. That combination makes it a no-cost option without a paid tier to weigh against its capabilities. The trade-off is scope: photographers who need digital asset management, printing or uploading will need other tools.

Key features

Raw development and masking

Multiple demosaicing algorithms and detailed development controls give photographers meaningful influence over how raw data becomes an image. This depth favors users who want to shape their rendering, but may be less approachable than a streamlined editor for someone looking for a simple, guided workflow. Masking tools are included; layer editing is not.

Batch work and editor handoff

Batch processing, plus the ability to copy and paste editing parameters between files, reduces repeated work across a set of images. Command-line use is also available alongside the graphical interface, giving the program a route beyond point-and-click editing.

RawTherapee can open raw images from GIMP as a plugin and return the edited image to GIMP. It can also send processed images to GIMP or another editing tool in one click. This makes it more practical as a development stage in a wider editing workflow, though it does not replace the missing library and output features.

Pricing

Free: free. The plan includes RawTherapee under the GPLv3 license, with no digital asset management, printing or uploading features. There are no paid tiers or seat, quota or trial terms to compare; the practical cost is that users needing those broader workflow functions must supply them elsewhere.

Platforms

RawTherapee is desktop software for Linux, macOS and Windows. The macOS 5.13 build requires macOS Tahoe 26.0 or newer on Apple Silicon, or macOS Monterey 12.0 or newer on Intel. It must be installed in /Applications and will not start from another location. Version 5.13 was released on July 26, 2026.

Who it's for

RawTherapee is a strong fit for enthusiasts who want to learn detailed raw development and for professional photographers who need non-destructive processing, broad camera support and batch tools without a software fee. It is a weaker fit for anyone seeking a single application to organize a photo collection, print finished work or upload it.

RawPedia documentation and a community forum are the project's support routes, giving users reference material and a place to seek help as they work through the controls.

Pros and cons

• Pros: Free, GPLv3 software across three desktop platforms, with raw and common non-raw format support.
• Pros: Non-destructive 32-bit floating-point processing, multiple demosaicing options, masking and batch editing provide substantial development control.
• Pros: GIMP integration and one-click handoff to external editors support a larger editing workflow.
• Cons: No layer editing, so users who depend on layered composition will need another editor.
• Cons: No digital asset management, printing or uploading, leaving library and output tasks to other software.
• Cons: Its detailed controls may demand more learning than a streamlined editor, particularly for newcomers.

Alternatives

darktable is another free, GPL version 3-or-later raw developer and photography workflow application for Linux, macOS and Windows; consider it if you want to compare a workflow-oriented option.

vkdt is a free, open-source photography workflow toolbox for Linux, macOS and Windows, an alternative for readers seeking that kind of toolbox.

Canon Digital Photo Professional is free for macOS and Windows and is included in initial software setup for Canon cameras; it suits Canon EOS digital camera and RAW-capable PowerShot owners considering software from that camera ecosystem.

Hasselblad Phocus is free RAW processing software for macOS and Windows and is another option to consider.

Nikon NX Studio is free desktop software for macOS and Windows, with Nikon camera and file-format support that varies; Nikon users can consider it as an alternative.

ART is a free option for Windows, macOS and Linux.

For an option beyond desktop Linux workflows, Darkroom is freemium on macOS and iOS: its Starter plan allows premium tools to be tried for as long as you like, but export requires Darkroom+; its Yearly plan is $39.99 a year, billed yearly.

Photomator is a paid photo editor for macOS and iOS, with monthly, yearly and lifetime plan options.

Browse more RAW Photo Processing Software, Photo Editing Software or Batch Photo Processing Software.

Verdict

Choose RawTherapee if you want free, cross-platform raw development with fine control, non-destructive processing and useful batch tools. Its main reason to choose it is the depth of development without a license cost; its main reason to look elsewhere is the lack of asset management, printing and uploading. Treat it as a capable processing stage, not a complete photo workflow.