πŸ“Š Image Histogram Analyzer

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Updated: 2026-07-11

Upload Image

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Click or drag & drop an image here
Supports JPG / PNG / WebP

How to Use the Histogram Analyzer

  1. Upload an Image
    Click or drag & drop an image. The tool instantly generates RGB and grayscale histograms.
  2. Read the Histograms
    Left = shadows, right = highlights. Peaks on the left indicate underexposure, peaks on the right indicate overexposure. A centered bell curve indicates good contrast.
  3. Check Image Info
    View dimensions, pixel count, average brightness, and RGB channel averages.

FAQ

How do I read a histogram?

The horizontal axis goes from 0 (pure black) to 255 (pure white). The vertical axis shows how many pixels are at each brightness level. A left-heavy histogram means underexposure, right-heavy means overexposure. A balanced mountain shape indicates good exposure.

What's the difference between RGB and grayscale histograms?

RGB histograms show each color channel separately, helping identify color casts. The grayscale (luma) histogram combines all channels weighted by human perception, giving an overall exposure analysis.

Is my image data secure?

100% secure. All analysis happens locally in your browser. Images are never uploaded to any server.

What formats are supported?

JPG, PNG, WebP, BMP, GIF, and other common image formats with transparency support.

Image Histogram Analyzer - 100% Client-Side | More Tools

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