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Image Tools
Open tool Image Border Color Variance Report
Report per-channel population variance over the visible one-pixel border.
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Calculators
Open tool Image Compression Ratio Calculator
Create a bounded, browser-local image compression ratio calculator with visible assumptions, review guidance, and downloadable output.
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Calculators
Open tool Image File Size Calculator
Estimate uncompressed image memory from dimensions, colour depth, and image count.
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Image Tools
Open tool Image Hue Circular Concentration Report
Report weighted circular mean hue and resultant concentration.
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Image Tools
Open tool Image Laplacian Edge Map
Create an absolute four-neighbor second-derivative luminance map.
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Downloaders & Public Media
Open tool Image Licence Notice Generator
Prepare a browser-safe public-media workflow for image licence notice generator with visible permission and privacy boundaries.
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Image Tools
Open tool Image Lightness Distribution Report
Report decoded HSL lightness mean, quartiles, and extrema.
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Image Tools
Open tool Image Local Contrast Report
Report RMS luminance deviation from a clamped three-by-three local mean.
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Image Tools
Open tool Image Luminance Centroid Report
Report alpha-weighted decoded-luminance center in pixel and normalized coordinates.
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Image Tools
Open tool Image Luminance Extrema Location Report
Locate first row-major minimum and maximum visible luminance samples.
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Image Tools
Open tool Image Luminance Histogram Report
Export a complete 256-bin visible decoded-luminance distribution as JSON.
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Image Tools
Open tool Image Luminance Median Deviation Report
Report visible luminance median and robust median absolute deviation.