Password generator
CSPRNG via crypto.getRandomValues. Entropy computed honestly.
click generate…
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Unit converter
Length · mass · temperature · data. Exact factors, no rounding surprises.
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JSON formatter
Paste JSON → pretty-print, minify, or find your missing comma.
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Base64 / URL codec
Unicode-safe (TextEncoder under the hood). Emoji survive.
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Epoch converter
Auto-detects seconds vs milliseconds. Timezone-aware both ways.
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ISO 8601—
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Hash (SHA family)
Web Crypto API — the same primitives your browser uses for TLS.
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Color inspector
HEX ⇄ RGB ⇄ HSL + WCAG contrast against black & white.
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RGB—
HSL—