About Add Noise
Image noise is random variation in pixel brightness or color, similar to film grain. This tool adds a uniformly distributed random offset to every pixel, up to the strength you set (1 to 128 on a 0 to 255 scale). In single-color mode the same offset goes to red, green, and blue, giving gray grain. Otherwise each channel gets its own offset. Transparency is left unchanged.
How to use Add Noise
- Choose an image, or drag it onto the upload area. The file is read by your browser and is not uploaded.
- Set "Strength" and "Single-color noise". The preview updates as you change them.
- Check the preview, then press "Download result" to save the file.
Questions about Add Noise
Why does the noise pattern change every time I move a slider?
The grain is generated from fresh random numbers on every redraw, so no two results are identical. Download the image when you see a version you like, because the same pattern cannot be reproduced.
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