Image Histogram

Drop an image and read its tonal distribution — the red, green, blue, and luminance (Rec.709) histograms that photographers use to judge exposure, clipping, and color cast. Toggle channels, use a log scale to see the tail, and read per-channel mean / median / standard deviation / min / max plus shadow and highlight clipping. Everything is computed from a canvas in your browser; the image is never uploaded.

Click to choose, or drag & drop an image

Red Green Blue Luma

Log scale Smoothing 0

Bins are 256 levels (0–255) per channel. Shadow clip is the share of pixels pinned to 0, highlight clip the share pinned to 255 — large values suggest blown blacks or whites. The luminance channel uses Rec.709 weights (0.2126 R + 0.7152 G + 0.0722 B). No network requests are made.