Formatter JSON

Format, validate and beautify JSON instantly. Detect syntax errors with clear messages. Free online JSON formatter tool.

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JSON (JavaScript Object Notation) has become the universal language of data exchange across the web — used in REST APIs, configuration files, databases and almost every modern software system. But raw, minified JSON is virtually unreadable to the human eye, and even a single misplaced comma or unclosed bracket will cause a complete parse failure. Our JSON formatter and validator instantly beautifies any JSON string into properly indented, colour-highlighted output, while simultaneously validating its syntax and pointing to the exact location of any error.

JSON formatting is a cornerstone of modern developer workflows. If you work with encoded data, our Base64 Encoder/Decoder pairs perfectly with JSON work — many APIs transmit binary or sensitive JSON data in Base64 encoding, and being able to decode it instantly is an essential debugging skill for any backend or full-stack developer.

For time-sensitive API responses and database records, our Unix Timestamp Converter translates the epoch timestamps that appear in virtually every JSON API response into human-readable dates — an indispensable tool when debugging date-related logic in any modern application.