RawTherapee

About

RawTherapee

RawTherapee is an open-source RAW image processing application first developed in 2004 by Hungarian engineer Gábor Horváth and re-licensed under the GNU General Public License in 2010. The software is dedicated to detailed RAW conversion for enthusiast and professional photographers, with a 32-bit floating-point pipeline offering multiple demosaicing algorithms, granular noise controls, and cross-platform builds for Windows, macOS, and Linux.

RawTherapee was created in 2004 by Hungarian software engineer Gábor Horváth, who released the application as a freeware Windows RAW processor before opening the source under the GNU General Public License version 3 in January 2010. That license change turned the project into a genuinely community-driven effort. Development coordination moved to the Beep6581 GitHub organization, and a small core team of maintainers, alongside dozens of contributors and translators, has kept the codebase updated through the 5.x series. Version 5.13, released in July 2026, followed the 5.12 branch and confirmed that the project remains actively developed nearly two decades after its founding. RawTherapee's processing pipeline runs at 32-bit floating-point precision from demosaicing through export, which lets photographers experiment with tonal and color adjustments without introducing banding or clipping. The application offers a choice of demosaicing algorithms including AMaZE, RCD, DCB, LMMSE, IGV, and monochrome variants, so photographers can match the algorithm to the camera sensor pattern and the fine detail they are trying to preserve. Wavelet-based tools address noise reduction, detail enhancement, and contrast adjustment across frequency scales, while the local adjustments module applies exposure, color, and sharpness changes through drawn or parametric masks similar to those found in Adobe Lightroom. Users work from a folder-based file browser rather than a managed catalog, and processing profiles let a single starting recipe apply to entire shoots. The export queue produces TIFF, JPEG, and PNG at any bit depth the format supports, with configurable color management and metadata carry-through. The application is available as free source and precompiled binaries for Windows, macOS, and Linux through rawtherapee.com, and community support runs through the official RawPedia documentation wiki, an active support forum, a Reddit community at r/rawtherapee, and the project's GitHub issue tracker. RawTherapee remains one of the most technically detailed free RAW processors, and photographers who want fine-grained control over demosaicing decisions choose it over more automated alternatives.