Image Histogram

Key features

• 256-bin histograms for the red, green and blue channels, perceptual luma (Rec. 709) or an overlaid RGB view.
• A log scale toggle tames tall spikes so small bins stay visible.
• An exposure verdict — Under-exposed, Well exposed or Over-exposed — derived from average luma.
• Clipping percentage flags pixels at pure black or white in any channel, with a warning above 2%.
• The chart exports as a crisp 2× PNG for reports and tutorials.

How it works

1. 1

   Load A Picture

   PNG, JPG or WEBP; analysis starts at once.

2. 2

   Switch Channel Views

   Inspect R, G, B, luma or the combined RGB overlay.

3. 3

   Check The Read-Out

   Check the exposure verdict, brightness tier, peak value and clipping percentage.

4. 4

   Download The Chart

   Save the histogram itself as a PNG if you need it elsewhere.

Tips for better results

• 💡Spikes pinned to the far left or right edge mean crushed shadows or blown highlights.
• 💡Luma uses Rec. 709 weights, matching how human eyes perceive channel brightness.
• 💡Very large images are sampled (analysis is capped on the long edge), so the shape is representative rather than per-pixel exact.

Frequently asked questions