Most free formatters stop at pretty-printing. This one debugs, explores, and converts your JSON.
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Real auto-fix, not just formatting
Repairs trailing commas, single quotes, unquoted keys, comments, and Python-style literals with a tokenizer, not fragile regex.
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Searchable tree view
Expand and collapse nested objects and arrays, with a live search box that highlights matches anywhere in the structure.
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Image URL preview
Hover any string value that looks like an image URL in the tree view to see an inline thumbnail preview.
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100% client-side
Your JSON is processed entirely in your browser. Nothing is uploaded or stored on any server.
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XML, CSV & YAML export
Convert formatted JSON into other common data formats in one click, with sensible error messages when structure doesn't fit.
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Precise error locations
Syntax errors are translated from a raw character position into an exact line and column, so you can jump straight to the problem.
A side-by-side look at popular JSON formatters.
Is my JSON data uploaded to a server?▾
No. Formatting, validating, and converting JSON all happen locally in your browser. Your data is never sent to SEOTriggers or stored anywhere, unlike tools that require login to keep shared JSON private.
Can this tool fix broken JSON automatically?▾
Yes. The Fix & Format button repairs common issues: trailing commas, single-quoted strings, unquoted object keys, JavaScript-style comments, and Python-style True/False/None literals. It's tokenizer-based, so it won't corrupt strings that happen to contain commas, colons, or quote characters.
What is the JSON tree view for?▾
The tree view lets you explore deeply nested JSON by expanding and collapsing objects and arrays, similar to a file browser. Image URLs in string values show a hover preview, and the search box highlights matching keys or values anywhere in the structure.
Can I convert JSON to CSV, XML, or YAML?▾
Yes. The Convert tab turns your JSON into XML, YAML, or CSV. CSV conversion requires the top-level JSON to be an array of flat objects, since spreadsheet rows can't represent arbitrary nesting.
Why does JSON.parse give a confusing error message?▾
Browsers report JSON syntax errors as a character position rather than a line number, which is hard to use directly. This tool converts that position into the exact line and column so you can jump straight to the problem.
Does this tool support loading JSON from a URL?▾
Yes. Paste a URL that returns JSON and the tool will fetch it directly from your browser. If the remote server blocks cross-origin requests, it automatically retries through a chain of public CORS proxies before giving up.