Posterize a PNG
Reduce continuous color variations into solid visual bands. 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 Posterize a PNG
- 1. Upload the PNG. Add the photo or graphic you want to flatten into bands of color. It loads into the preview ready for the effect.
- 2. Set the levels per channel. Move the Levels per channel slider to control how many distinct steps each color channel is reduced to. Fewer levels give a bolder poster look, more levels keep subtler gradations.
- 3. Download the posterized PNG. Save the result once the banding matches the look you want. Continuous gradients are now replaced with flat, solid steps of color.
When to use Posterize a PNG
Posterize a PNG reduces continuous color variation into solid visual bands, giving a photo the flattened, graphic look associated with screen-printed posters. Pick it whenever a photograph needs to read as bold illustration instead of smooth tone.
- Designing a retro concert poster. A photo of a performer needs to look like a screen-printed gig poster. Posterizing it down to 4 tones per channel gives the flat, high-contrast band effect that style calls for.
- Creating a graphic t-shirt print. A photo-based shirt design needs to be reduced to a small number of solid colors that a screen-printer can actually reproduce with separate ink layers.
- Simplifying a photo for a stencil or vinyl cut. A craft project needs a photo reduced to a handful of tonal bands so it can be traced into a cuttable stencil or vinyl decal shape.
Examples
Poster-art banding
Input
photo.png
Output
photo.png flattened to 4 tones per channel
About the Posterize a PNG tool
Posterize a PNG does its work locally, right in the browser. Reduce continuous color variations into solid visual bands. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the PNG Tools collection on EditSafely, a set of 108 small, focused PNG utilities that share the same instant, private workspace.
You can shape the output with the Levels per channel 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.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Posterize a PNG cost anything?
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?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
Which files does Posterize a PNG accept?
It accepts PNG images. 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?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
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.