Image histogram

See an image's tonal distribution — RGB channels and luminance plotted, with exposure stats.

256 bins per channel. Very large images are stride-sampled so analysis stays fast — the sampled count is reported.

The image stays in this browser. Nothing is uploaded or stored.

PNG, JPG, or WebP up to 25 MiB.

How to use

  1. Choose an image.
  2. Read the RGB/luminance chart.
  3. Download the histogram as PNG if needed.

What it supports

Static images ≤ 25 MiB / 40 MP; 256-bin channels plus Rec. 601 luminance, and black/white clipping percentages.

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