Image Brightness Analyzer
Drag & drop an image here or click to select
Average Brightness
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Dark Pixels
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Midtones
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Bright Pixels
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This free image brightness analyzer lets you measure the overall light level of any image directly in your browser. Upload a photo to calculate its average brightness, view a brightness histogram, and see how pixels are distributed across dark, midtone, and bright ranges. The tool processes everything locally, so your images stay on your device and are never uploaded.
How to Use the Brightness Analyzer
- Drag and drop an image into the upload area, or click the upload box to choose a file.
- The tool will instantly analyze the image inside your browser.
- Review the brightness statistics and histogram generated from the image.
- If needed, download the histogram to keep a visual reference of the brightness distribution.
Understanding the Brightness Results
- Average Brightness – The overall luminance of the image on a scale from 0 (black) to 255 (white).
- Dark Pixels – The percentage of pixels in the shadow range of the image.
- Midtones – The percentage of pixels with medium brightness levels.
- Bright Pixels – The percentage of pixels near highlight areas.
- Brightness Histogram – A visual graph that shows how brightness values are distributed across the entire image.