JSON Formatter & Validator — AI Auto-Fix, Tree View & Search
Paste JSON, get it formatted instantly. AI auto-fix for broken syntax, interactive tree view, search, JSON path display, and shareable links. 100% browser-based — your data stays private.
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Frequently Asked Questions
What happens if my JSON is invalid?
The tool shows the exact line and column number of the syntax error. You can also use the AI Auto-Fix button to automatically repair common errors like missing commas, trailing commas, and single quotes.
Can I search within formatted JSON?
Yes! Use the search bar above the output to find specific keys or values. Matching lines are highlighted in code view, and matching nodes auto-expand in tree view.
Does it save my work?
Yes, your input is automatically saved to your browser's local storage and restored when you return. You can also generate a shareable link to share JSON with others.
How does tree depth control work?
In tree view, click the tree icon to choose how many levels to expand (1, 2, 3, or all). Click any node to see its full JSON path (e.g., $.employees[0].name).
Is there a size limit?
The tool handles large JSON files efficiently. All processing happens entirely in your browser — your data never leaves your device.