Open the Posterize / Levels Tool tool, add up to 30 images, set your options below, press Convert All and download — the whole job runs on your device, so it is free, private and takes seconds.
Step by step
Load the Posterize / Levels Tool page. Nothing installs and nothing signs in — the editor appears immediately, ready for files.
Drag files onto the drop zone, click to browse, or paste from the clipboard. You can load up to 30 at once for a batch job.
Move the amount slider and watch the live preview. Effects are non-destructive on screen — only the exported file is baked, at full resolution.
Press Convert All. Because everything runs on your device, a whole queue of photos finishes in a few seconds.
Save each result individually, or grab the entire batch as a single ZIP. Originals are never modified.
Settings that matter
| Effect | compress tones into bold bands |
|---|---|
| Amount | Strength slider with live preview — bake it only on export. |
| Output | Full resolution, source format preserved. |
Pro tips & common mistakes
- Subtlety wins — most filters look better at 60–80% strength than at full blast.
- Effects are baked on export, so preview lightly and re-run if you overdo it.
- Batch it: up to 30 files per run beats doing them one at a time.
- Keep originals for anything critical — the tool never touches the source file, but always keep your master copy.
Guides & tools for Color & Filter jobs
Prefer the reference view? The full Posterize / Levels Tool tool page, the Color & Filter collection and the image format guide are linked throughout.