Gainmaps
Convert standard images and text into HDR gain maps locally in the browser or via CLI.
Open productWhat it does
About Gainmaps
Gainmaps is an open-source tool and project designed to create HDR gain map images from standard SDR images and text. It encodes gain maps directly within the browser using a local service worker without server uploads or registration, while also providing a CLI tool for batch processing targeted at ISO 21496-1 standards. The software supports input formats including PNG, JPEG, WebP, AVIF, GIF, HEIC, and SVG to produce Ultra HDR JPEG files that render brighter highlights on modern HDR displays.
- Availability:
- launched
- Access:
- free
- Format:
- software
- Platform:
- web
- Platform:
- cli
Core capabilities
In-Browser Local Encoding
Converts graphics directly in the web browser using a service worker without sending files to external servers or requiring an account.
CLI Batch Processing
Batch-processes image assets from the terminal targeting ISO 21496-1 Ultra HDR JPEG standards.
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