JSON Formatter & Validator

Format, validate, prettify, and minify JSON data with instant syntax error detection.

developer 🛡️ 100% Client-Side

Professional JSON Editor & Diagnostics

Advanced code editor, precise syntax diagnostics with line/col accuracy, safe repairs, and interactive AST tree.

⚪Empty Editor

Ln 1, Col 1•1 lines•0 chars

UTF-82 spaces

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JSON Document Structure & Metrics

Byte Size—

Lines0

Characters0

Objects—

Arrays—

Properties—

Max Nesting—

Strings—

Numbers—

Booleans—

Nulls—

Syntax Errors0

About JSON Formatter & Validator

Robust, client-side JSON parser and formatter. Formats with customizable indentation, detects syntax errors with exact line and column coordinates, minifies payloads, and allows instant file downloads.

🔒 Zero files sent to remote servers • ⚡ In-memory instant execution • 🌐 Works offline in your browser