💻 Developer Tools
JSON Formatter & Validator — Format JSON in One Click
What JSON is, how to format and validate it online, common JSON errors, and how to minify JSON for production.
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Base64 Encode & Decode — What Is Base64 and How to Use It
A complete guide to Base64 encoding: what it is, why it exists, how to encode/decode in JavaScript, Python, and online.
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URL Encode & Decode — Percent Encoding Explained
What percent encoding is, which characters need encoding, and the difference between encodeURI and encodeURIComponent.
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Hash Generator Online — MD5, SHA-1, SHA-256 Explained
Algorithm comparison table, use cases for each hash function, and how to verify checksums from the command line.
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UUID Generator Online — v1 vs v4 Explained
What UUIDs are, the difference between v1 and v4, and when to use them in databases and APIs.
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Regex Tester Online — Regular Expressions Explained
Regex syntax cheat sheet, common patterns, flags reference, and how to test regexes in your browser.
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JWT Decoder Online — Inspect JSON Web Tokens Instantly
JWT structure explained, standard claims, security warnings, and the difference between HS256 and RS256.
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CSS Minifier Online — Compress & Beautify CSS Instantly
What CSS minification does, before/after examples, and how to minify CSS in Vite, webpack, and PostCSS.
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Timestamp Converter Online — Unix Epoch Explained
What Unix timestamps are, seconds vs milliseconds, code samples, and the Y2038 problem.
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Password Generator Online — Strong & Secure Passwords
Password entropy explained, comparison table by length and character set, and advice on password managers.