Developer Tools Calculators
14 tools, each with formula and worked examples
JSON formatter, regex tester, UUID generator, and other developer utilities.
Data Formats · 5
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JSON Formatter
Format, validate, and beautify JSON data instantly. Paste messy JSON and get clean, indented output with synta…
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Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, and various da…
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UUID Generator
Generate random UUID v4 and ULID identifiers instantly. Bulk generate multiple IDs, copy to clipboard, and cho…
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Cron Generator
Build cron expressions visually with an intuitive interface. Select minutes, hours, days, months, and weekdays…
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Color Converter
Convert colors between HEX, RGB, and HSL formats instantly. Perfect for web designers and developers working w…
Text & Code · 6
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Regex Tester
Test and debug JavaScript regular expressions in real-time. Enter a pattern, flags, and test string to see mat…
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Lorem Ipsum
Generate Lorem Ipsum placeholder text for your designs, mockups, and wireframes. Choose paragraph count, word …
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Markdown Editor
Write markdown in a live editor and preview the rendered HTML in real-time. Supports headings, bold, italic, l…
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Code Minifier
Minify HTML, CSS, and JavaScript code for production deployment. Strips whitespace, comments, and unnecessary …
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Code Diff Checker — Compare
Compare two blocks of text or code side-by-side. See additions, deletions, and unchanged lines highlighted for…
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Case Converter
Convert text between 9 case formats: camelCase, PascalCase, snake_case, kebab-case, dot.case, Title Case, Star…
Encoders & Decoders · 3
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QR Code Generator
Generate QR codes from any text or URL. Customize size and download as PNG images. Perfect for sharing links, …
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JWT Debugger
Decode and inspect JSON Web Tokens (JWT) client-side. View the header, payload, and signature information with…
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HTML Entities
Encode and decode HTML entities instantly. Convert special characters to HTML entities and back between named,…