16 live tools
Developer & Webmaster
Formatters, generators, and encoding utilities.
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JSON Formatter & Validator
Pretty-print JSON and surface syntax errors.
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Base64 Encoder / Decoder
UTF-8 and emoji-safe encode/decode, Standard or URL-safe, with byte telemetry.
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HTML to Markdown Converter
Convert HTML tags to Markdown.
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CSS Box-Shadow Generator
Live preview and copy-ready CSS.
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CSS Gradient Generator
Linear and radial gradients.
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UUID / GUID Generator
Generate version-4 identifiers.
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URL Encoder / Decoder
Percent-encode and decode URLs.
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Color Code Converter
HEX, RGB, and HSL conversion.
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Meta Tags Generator
Open Graph and Twitter Card tags.
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Robots.txt Generator
Allow, disallow, and sitemap URL.
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JSON to YAML Converter
Validate JSON in the browser and dump YAML with 2 or 4 space indent.
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CSS Minifier & Optimizer
Strip comments, shorten hex, and see original vs minified bytes saved.
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Cron Expression Generator
5-field crontab builder, English explanation, and next 5 local run times.
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JWT Decoder
Inspect header, payload, exp/nbf status, and alg none without uploading the token.
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JSON Formatter and Minifier
2-space, 4-space, tab, or compact JSON with auto-fix and line/column errors.
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Regex Tester
JavaScript regex flags, match table with groups, presets, and a 20k ReDoS cap.
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