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Calculators
Open tool Harmonic Mean Calculator
Calculate harmonic mean and reciprocal context for six positive rates.
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Security & Privacy
Open tool Hash Generator
Create a bounded, browser-local hash generator with visible assumptions, review guidance, and downloadable output.
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Pets & Animal Care
Open tool Horse Feed Calculator
Create a bounded, browser-local horse feed calculator with clear inputs, guided review, and a practical output.
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Calculators
Open tool Hours Worked Calculator
Turn a representative shift into paid daily, weekly, regular, and above-limit hours.
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Developer & Data
Open tool HTTP Header Inspector
Parse HTTP headers and highlight common security and delivery controls.
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Image Tools
Open tool Image Alpha Coverage Report
Report transparent, partial, and opaque pixel counts and percentages.
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Image Tools
Open tool Image Border Adder
Add a solid frame without covering source pixels.
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Image Tools
Open tool Image Color Picker
Sample a preview pixel as HEX and RGB.
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Image Tools
Open tool Image Colorfulness Report
Report the Hasler-Susstrunk opponent-channel colorfulness score.
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Image Tools
Open tool Image Dominant Hue Report
Report the strongest saturation-weighted ten-degree HSV hue interval.
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Image Tools
Open tool Image Edge Orientation Report
Report strong Sobel-gradient directions in eight documented bins.
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Image Tools
Open tool Image Hue Diversity Report
Report occupied chromatic hue bins and normalized hue entropy.