JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting, error detection, and tree view
How to Use This Tool
Paste your JSON data into the input textarea.
Choose your indentation style (2 spaces, 4 spaces, or tabs).
Click "Format" to beautify, "Minify" to compress, or "Validate" to check validity.
Switch between Formatted view (with syntax highlighting and line numbers) and Tree View (collapsible, interactive).
View stats (keys count, depth, size) and copy the output with one click.
About This Tool
JSON Formatter is a powerful tool for working with JSON data. Paste any JSON and instantly format it with syntax highlighting and line numbers, minify it for production use, or validate its structure. The tree view provides a collapsible, interactive visualization of your JSON hierarchy — expand and collapse nodes to navigate complex data. Error messages pinpoint exactly where invalid JSON breaks. Stats show the total number of keys, nesting depth, and size in bytes. Everything runs locally in your browser — your data is never sent to any server.
Frequently Asked Questions
Common causes include trailing commas after the last item in an array or object, single quotes instead of double quotes, unquoted keys, or missing commas between items. JSON is stricter than JavaScript object syntax.
Format adds indentation and newlines to make JSON human-readable. Minify removes all unnecessary whitespace to produce the smallest possible output — ideal for APIs, storage, and network transfer.
The tree view renders your JSON as an interactive, collapsible hierarchy. Click any object or array node to expand or collapse it. This makes it easy to navigate deeply nested JSON without scrolling through walls of text.
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