Developer Tools
Format and validate JSON, encode and decode Base64 and URLs, decode JWTs, test regular expressions, and generate hashes and UUIDs.
Tools in Developer Tools
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JSON Formatter
Format, beautify and validate JSON instantly in your browser. Pinpoints syntax errors by li…
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Base64 Encoder & Decoder
Encode text to Base64 or decode it back, instantly and in your browser. Supports UTF-8, URL…
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JWT Decoder
Decode a JWT to read its header, payload and claims. Shows expiry, flags unsigned tokens, a…
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Regex Tester
Test regular expressions with live highlighting, capture groups and replace. Runs safely in…
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URL Encoder & Decoder
Encode or decode URLs and query strings instantly in your browser. Handles UTF-8, full URLs…
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Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes instantly in your browser using the Web…
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UUID Generator
Generate cryptographically random UUIDs in bulk. Supports version 4 and time-ordered versio…
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JSON Validator
Validate JSON and see every problem in one pass, not just the first. Catches trailing comma…
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Base64 Decoder
Decode Base64 to text or download it as a file. Handles URL-safe input, missing padding, MI…
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JSON Minifier
Minify JSON safely by re-serialising it, not by stripping whitespace with a regex. Shows th…
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URL Decoder
Decode percent-encoded URLs and query strings. Handles + as space, repeated encoding, and p…
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YAML Formatter
Reformat YAML with consistent indentation, check it for errors, and convert between YAML an…
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XML Formatter
Format XML with proper indentation, or minify it. Checks that tags are balanced and preserv…