Generate a Noise Image
Make a white-noise texture at any size — monochrome or colour, with adjustable grain, as a PNG.
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What noise is actually used for
Grain sets the block size
At grain 1 every pixel is independent — the finest possible noise. Higher values generate a smaller field and scale it up with no smoothing, so each "pixel" becomes a block. That is what turns fine sensor noise into a coarse, deliberate texture.
Monochrome or colour
Monochrome varies brightness only and reads as film grain or paper texture. Colour randomises each channel separately and reads as television static. They are very different effects and monochrome is the one that works as an overlay.
Overlay it at low opacity
Noise is almost never used at full strength. Layer it over a flat colour or gradient at 3 to 8 percent and it removes the plastic flatness of a digital fill without ever being visible as noise.
It fixes gradient banding
A subtle noise layer over a large gradient breaks up the visible steps that appear in 8-bit colour. This is the standard fix, and it works because the eye averages the dither into the ramp.
Noise does not compress
Random data is incompressible by definition, so a noise PNG is large for its dimensions. Generate the smallest tile that works and repeat it rather than making one full-page file.
Using noise well
Low opacity or nothing
Noise at full strength is noise. At 3-8% over a flat fill it reads as texture and nobody can name what changed.
Small tile, repeated
Random data is incompressible, so a full-page noise PNG is huge. Generate a small tile and repeat it in CSS.
Nudge grain to re-roll
There is no regenerate button — changing any control redraws the field with new values.
How to generate a noise image
Choose monochrome or colour
Monochrome for grain and texture overlays, colour for static.
Set grain and size
Grain 1 is finest. Generate a small tile if you plan to repeat it.
Download
Free preview, or the full-resolution PNG in the app.
Where a noise texture helps
Film grain overlays
Add analogue texture over a flat digital image.
Fixing gradient banding
Break up the visible steps in a large 8-bit gradient.
Texture in flat design
Take the plastic sheen off a solid brand colour.
Static and glitch effects
Generate colour static for a broken-signal look.
Or just ask
Describe the edit in your own words
Type what you want changed and the assistant does it on the canvas — each step lands as a layer you can reopen, so nothing it does is baked in.
No edits yet.
Frequently Asked Questions
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Generate a noise texture
Monochrome or colour, any grain.