Online Batch Image Posterize Tool

What Online Batch Image Posterize Tool does

Batch process multiple images: reduce the levels of each color channel.

Worked example

How the pixels are processed

Each color channel is quantized into a smaller number of discrete values.

Useful workflows

• Prepare web graphics, product images, presentations or visual test fixtures.
• Compare the preview at 100% zoom before exporting the result.
• Keep consistent settings across related images while reviewing each batch item separately.

Quality, privacy and compatibility checks

• Repeated lossy export can reduce quality; retain an original and choose an appropriate output format.
• Very large dimensions or batches can exceed browser memory even when total file size appears small.
• Metadata, color profiles, animation and transparency may not be preserved by every canvas export format.

Frequently asked questions

Is the source image uploaded?

The normal editor decodes and processes supported images in this browser without uploading them to an application server.

Why can the downloaded image look different?

Check output format, compression, color profile, transparency, dimensions and whether the browser applied orientation metadata.