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About NormalMapBench
NormalMapBench is a free, browser-based normal map generator for 3D artists and game developers. Upload a heightmap or image, adjust strength and scale, preview the result in a 3D viewer, and download the normal map as PNG or EXR. Uses the Sobel operator for normal calculation with optional WebGL acceleration. Completely free, open source, and no account required.
Updated 9/22/2026
Key Features
- Browser-based normal map generator — runs entirely in your browser with no server upload
- Heightmap to normal map — upload grayscale heightmaps or images to generate normal maps
- Real-time 3D preview — view the generated normal map applied to a 3D sphere in real time
- Adjustable strength & scale — tune the normal map intensity and detail level with sliders
- Multiple format support — input: PNG, JPG, etc.; output: PNG or EXR (high dynamic range)
- Sobel operator — uses the Sobel operator for accurate normal calculation from heightmaps
- WebGL acceleration — GPU-accelerated preview when available, falls back to CPU
- Offline capable — works without internet after initial load (service worker caching)
- Free and open source — MIT License, no account required, no hidden costs
- Download options — save as PNG (standard) or EXR for HDR workflows in 3D software
Pricing Structure
- Free — $0 — Full access to all features, no account or sign-up required.
Why People Use It
3D artists and game developers use NormalMapBench to quickly generate normal maps from heightmaps or images without installing any software. The tool runs entirely in your browser, offers real-time 3D preview, adjustable strength and scale sliders, and supports common input/output formats including PNG and EXR. Free, open source, and no account required — ideal for creating normal maps for PBR workflows, game assets, and 3D modeling projects.
See NormalMapBench in Action
