RawTherapee

RawTherapee is a free, open-source raw image processing program designed for non-destructive editing. It is cross-platform, available for Linux, Windows, and macOS, and is distributed under the GNU General Public License (GPL) version 3 or later. The software relies on the LibRaw library to decode.raw files and provides a comprehensive pipeline for converting sensor data into final images.

Its editing workflow is non-destructive and modular, allowing adjustments to exposure, white balance, tone, color, and noise reduction without altering the original files. Key features include advanced demosaicing, comprehensive color management with ICC profiles, lens correction, chromatic aberration removal, and perspective correction. The program offers a wide range of tonal and color controls, including curves, color channels, and histogram-based tools, as well as batch processing capabilities for processing multiple images in a queue.

RawTherapee supports a broad array of raw formats from many camera models and can export to common image formats such as TIFF, JPEG, and PNG. It emphasizes image quality and flexibility, providing controls for shadows and highlights recovery, local contrast enhancements, and selective color adjustments. The user interface presents a set of work areas for organizing files and applying edits, with a focus on providing detailed, non-destructive development options.

Development and distribution are community-driven. RawTherapee is maintained by an international network of volunteers and hosted on public repositories, with releases issued by contributors. The project aims to offer a high-quality, open-source alternative for photographers seeking robust raw processing tools.