Private, browser-local utility
Image Histogram Viewer
Inspect RGB and luminance distributions from a local PNG, JPEG, or WebP image.
Your input and result stay in this browser tab. Nothing is uploaded, fetched, logged, or stored.
Loading local tool…
Result
Histogram method and privacy
Pixels are decoded with browser APIs and counted into 256-bin red, green, blue, and BT.709 luminance histograms. Fully transparent pixels are ignored. The report includes exact black/white clipping counts for every channel.
Limits: PNG/JPEG/WebP, 15 MB, 8,192 pixels per side, and 16,777,216 pixels. Oversize images are rejected rather than silently downsampled. No image leaves this tab, and no metadata is uploaded.