JSON Formatter & Validator
Format, validate, minify, and explore JSON with an interactive tree viewer
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JSON Tree Viewer
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Format & Beautify
Prettify messy JSON with configurable 2-space or 4-space indentation for maximum readability.
Validate with Precision
Instantly check JSON syntax and get precise error locations with line and column numbers.
Interactive Tree Viewer
Explore JSON with a collapsible tree view. Expand and collapse objects and arrays to navigate large documents.
Frequently Asked Questions
Yes, the JSON Formatter & Validator is completely free. No registration, no email, and no login required. Just paste your JSON and start formatting.
No. All formatting, validation, and tree viewing is done entirely in your browser using client-side JavaScript. Your data never leaves your device.
Formatting (or beautifying) adds indentation and line breaks to make JSON human-readable. Minifying removes all unnecessary whitespace to make the JSON as compact as possible for transmission or storage.
The validator highlights the exact line and column where a syntax error occurs, along with a descriptive error message. This makes it easy to locate and fix problems in your JSON.
The tree viewer renders your JSON as an interactive, collapsible tree structure. You can expand and collapse objects and arrays to navigate large JSON documents easily.
You can choose between 2-space and 4-space indentation. Two spaces is the most common convention, while 4 spaces provides more visual separation for deeply nested structures.
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