Next-gen image grain tool.

AVIF and WebP encoders smooth fine detail more aggressively than JPEG, so a grain that looks right before encoding can fade after. Add 2 to 5 points of intensity over what you'd use for a JPEG, and check the encoded result.

Mono grain at 8 to 15 percent for web images: depth without visible noise at normal viewing size. Judge it at the size it will be shown, not zoomed in.

Grain is detail, and detail costs bytes. Under 15 percent the increase is modest; heavy grain can double a file. For a page budget, keep it subtle.

A 2x display shows twice the pixels, so grain invisible at 1x may show at 2x. Test on a high-DPI screen if your readers use them.

Yes, for a consistent look: same mode and intensity across a project. Each image gets its own random pattern, but the character matches.

Intensity is the share of opaque pixels that get a new value, from 0 to 100 percent. At 5 to 15 percent the grain reads as texture; at 40 percent and up it reads as static. Fully transparent pixels are never touched, so a cut-out keeps its edges.

Random pixels writes any color. Mono grain writes a grey. Color variation nudges each channel by up to 28 steps, so the image keeps its colors. Palette noise reuses colors sampled from the image. Custom colors draws from the list you type, as hex or names.

The grain is drawn from a seed, so the same settings give the same picture until you press New noise, which draws a fresh pattern. Export several and you have frames for an animation.

PNG and WebP are written by every browser. AVIF is written only where the browser's canvas encodes it, which is Chrome and Edge today; elsewhere the AVIF choice falls back to PNG and the status line says so.

No. The file is decoded by your browser and every pixel is handled by JavaScript on your device. The page makes no request with your image, and you can load it, go offline and keep working.

No. The Next-gen image grain tool is free and opens without a sign-in, an account or an install.

Nothing. The Next-gen image grain tool holds your input in the page's memory, so closing or reloading the tab clears it, and it saves nothing in this browser.

Up to 100 MB per file, the limit the tool states under its drop area. A larger file is refused with a plain message instead of being decoded.

No, it takes one file at a time. If you drop or choose several, only the first is used; run the tool again for the next one.

You choose PNG, WebP or AVIF, and PNG is the default so the grain isn't compressed away. AVIF is written only in a browser that can encode it; otherwise the tool writes a PNG and says so.

No. The browser decodes the image and the tool writes a new file from its pixels, so camera EXIF, GPS position and text chunks in the original are not copied into the result. Keep the original file if you need them.

No. The result has the same width and height in pixels as the source.

Closest to the Next-gen image grain tool: AVIF noise generator, Add grain to an AVIF, AVIF to WebP converter, Image compressor. Each opens on its own page, free and in the browser.

The Next-gen image grain tool is one of 37 in its group. The group's page, /tools/avif, lists them all.

The tool is free. Its interface is built from shadcn.io's own components (Button, Input, Slider and the rest of the registry under /ui), which come in React, Vue, Svelte and Solid. Pro adds the blocks and templates for the product around it.