JSON Formatter & Validator
100% Client-Side Data & JSON ★ PopularFormat, beautify, validate, and minify JSON with interactive collapsible tree explorer, line-number error markers, and JSON5 relaxed syntax support.
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More in Developer (4)
View all Developer tools →YAML Formatter & Validator
Format and validate YAML streams with multi-document support (---), tab indentation warning fixers, block/flow formatting, and YAML to JSON conversion.
XML Formatter & Validator
Format, beautify, and validate XML documents with interactive DOM tree exploration, line-number error reporting, attribute sorting, and XPath copy.
Base64 Encoder & Decoder
Encode and decode UTF-8 Unicode text, files, images, and Data URLs with URL-safe Base64 toggles, line wrapping, and live image preview thumbnails.
JWT Decoder & Inspector
Base64URL decode JWT tokens, inspect registered and custom claims (exp, iat, iss, sub), detect security vulnerabilities, and verify HMAC signatures.
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