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Heat Capacity Calculator
Find a body heat capacity as mass × specific heat capacity.
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Heat Capacity Converter
Convert heat capacity between listed units.
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Heat Energy Calculator
Sensible heat in joules = mass × specific heat × temperature change.
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Heat Flux Calculator
Average heat flux = heat transfer rate / area.
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Heat Flux Converter
Convert heat flux between listed units.
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HEIC to PDF converter
A one-page PDF of the primary HEIC image. Decode HEIC pixels with the local libheif WebAssembly decoder and embed a PNG in a PDF.
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Hemisphere Surface Area Calculator
Find total closed hemisphere area as 3πr².
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Hemisphere Volume Calculator
Find hemisphere volume as 2πr³/3.
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Hex to RGB Converter
Convert #RGB or #RRGGBB colours into CSS rgb() values and individual red, green, and blue channels.
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Hex To Text Converter
Validate pairs of hexadecimal digits and decode the bytes as strict UTF-8.
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HMAC Generator
Calculate HMAC-SHA-256, SHA-384, or SHA-512 locally and copy hexadecimal or Base64 output.
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Hookes Law Calculator
Restoring force in newtons = − spring stiffness × displacement.
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Hourly to Salary Calculator
Convert hourly pay to gross annual, monthly, and weekly salary using your own working hours and weeks.
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HSL To RGB Converter
Convert hue, saturation and lightness through the standard HSL chroma and sector equations.
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HSV To RGB Converter
Convert HSV hue, saturation and value into rounded opaque RGB channels.
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Htaccess Generator
Validate a simple source path and destination, then generate a mod_alias Redirect directive.
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HTML Entity Encoder Decoder
Encode ampersands, angle brackets and quotes, or decode recognized HTML character references without executing markup.
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HTML Formatter
Parse and format source with a pinned local Prettier browser bundle.
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HTML Minifier
Minify HTML fragments or documents locally while preserving script, style, pre, and textarea content.
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HTML Sanitizer
Remove scripts, event handlers and unsupported markup from basic HTML. Review the cleaned fragment and a contained preview.
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