Convert an Image to a Color Mosaic
Average each square tile of an image into one flat color block. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Convert an Image to a Color Mosaic
- 1. Upload the image. Drop in the photo or graphic you want turned into blocky color tiles. It decodes so the tool can measure each region's average color.
- 2. Set the Tile size (px). Choose how many pixels each square tile covers. Small tiles like 8 keep more detail visible, large tiles like 32 or 64 flatten the image into bold, abstract blocks.
- 3. Download the mosaic image. Save the result once the preview shows the averaged tiles. Every pixel inside a tile is replaced by that tile's single flat average color.
When to use Convert an Image to a Color Mosaic
Convert an Image to a Color Mosaic averages each square tile of a photo into one flat color block, producing a blocky, abstracted version of the original. Use it for a stylized, low-detail look rather than a precise pixelation or resize.
- Making an abstract album cover. A musician wants an abstract, blocky version of a band photo for an album cover rather than the literal image. A large tile size turns it into a grid of flat color patches.
- Extracting a color palette reference. A designer wants to see the dominant color regions of a reference photo at a glance. A coarse mosaic tile size collapses the image into a handful of flat color zones to sample from.
- Creating a loading placeholder. A web gallery needs a lightweight blurred-looking placeholder to show while the full photo loads. A mosaic at a large tile size approximates the shape and color without full detail.
Examples
Blocky mosaic
Input
photo.png + tile size 16
Output
photo.png rendered as 16×16 flat color tiles
About the Convert an Image to a Color Mosaic tool
Convert an Image to a Color Mosaic runs as plain JavaScript in your browser tab, with no server behind it. Average each square tile of an image into one flat color block. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Image Tools section, 200 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with the Tile size (px) setting, and the result refreshes the moment you change it. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Convert an Image to a Color Mosaic free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
Which files does Convert an Image to a Color Mosaic accept?
It accepts images in any common format (PNG, JPG, WebP, GIF and more). There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.