Image Noise Generator

Intensity controls how extreme each noise pixel is — high intensity creates more pronounced, contrasty noise; low intensity creates subtle, fine grain. Opacity blends the noise layer with your original image — 100% opacity applies full noise, 50% makes the noise semi-transparent so the original shows through softly. For natural film grain, use medium intensity (30-50%) with 60-80% opacity.

Monochrome noise adds grain only in luminosity (brightness variation) — each noisy pixel stays the same hue as the original, just lighter or darker. This matches real silver grain in black-and-white film. Color noise adds random color variations too — each pixel shifts in both luminance and hue. Color noise at low intensity creates the characteristic "chroma noise" look of high-ISO digital photos taken in low light.

Select Film Grain type, set intensity to 25-40%, opacity to 60-75%, and choose monochrome mode. This closely simulates ISO 400-800 35mm film grain. For a grainier look (pushed film, ISO 3200), increase intensity to 60-70%. Apply to the full image rather than just shadows for an authentic analog feel. Film Grain works especially well on portraits and architectural shots.

Salt & Pepper creates extreme outlier pixels — each affected pixel is set to pure black or pure white regardless of the original color. It looks like dust or dead pixels. Gaussian noise creates subtle variations around the original pixel value — affected pixels shift slightly lighter or darker but not to extremes. Gaussian is more natural for photography; Salt & Pepper is used for texture overlays, grungy designs, or simulating damaged media.

Photography: adding grain to overly clean digital photos for warmth and film-like character. Graphic design: creating texture overlays for backgrounds, posters, and illustrations. Social media: the "vintage" or "analog" photo aesthetic popular on Instagram. Video thumbnails: grainy textures add visual interest and stand out in feeds. Web design: subtle noise on flat-color backgrounds prevents banding and adds depth without affecting readability.

Yes. The tool shows a split-view comparison: the original image on one side and the noised result on the other. Adjust the intensity, opacity, and type sliders and the preview updates in real time so you can dial in the exact look before downloading. Use the preview to compare how different noise types affect your specific image.

Yes. Canvas API handles all noise generation entirely in your browser. No images are uploaded to any server. Your originals and processed results never leave your device.