Image Posterize Tool
Reduce local RGB channels to a selected number of tonal levels.
How Image Posterize Tool works
Image Posterize Tool is designed to reduce local RGB channels to a selected number of tonal levels. Each RGB byte is quantized to the nearest of the selected evenly spaced channel levels, leaving alpha untouched. Image Posterize Tool adds a focused result for this operation. For Image Posterize Tool, the immediate result links every visible control to a value or preview that can be inspected as the settings change.
Four levels map the sample RGB value 100, 150, 200 to 85, 170, 170. Use it to simplify photographic color, prepare screen-print references, or explore low-palette graphic treatments. In Image Posterize Tool, keeping this example as a reference helps distinguish a control change from an unexpected implementation result.
Limits, output, and privacy
Per-channel levels create more total combinations than the displayed level count; four levels can still produce up to 64 RGB colors. For Image Posterize Tool, large source images require more memory because the browser holds both source and output pixel buffers while processing. Image Posterize Tool keeps the operation client-side. With Image Posterize Tool, the entered values or selected file remain on this device, and the final action uses only the result already held by the browser.
Frequently Asked Questions
How does the image posterize tool work?
It will reduce local RGB channels to a selected number of tonal levels. The default controls reproduce the worked vector described on the page.
What should I verify before using the result?
For Image Posterize Tool, large source images require more memory because the browser holds both source and output pixel buffers while processing.
Does the image posterize tool upload my input?
No. Image Posterize Tool performs its calculation, preview, and copy or download action locally in your browser.
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