JSON Formatter
Reading a dense blob of minified JSON is painful and debugging a malformed JSON response wastes time. Paste your raw JSON string and this tool parses it, highlights syntax errors with line numbers, and reformats it with your chosen indentation width. It also works in reverse — paste pretty JSON and compress it into a compact one-liner for production payloads.
Processed on your deviceNo signup required100% free
How to Use
- Paste your JSON string into the editor area.
- Choose an indentation size (2, 4, or tab) or select the minify option.
- The formatted or minified output appears in real time.
- Copy the result with one click.
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Frequently Asked Questions
What happens if my JSON has a syntax error?
The tool highlights the exact line and character position of the error so you can fix it quickly.
Can it handle JSON files larger than 1 MB?
Yes. It supports JSON up to 10 MB, though very large files may take a moment to format.
Does it sort object keys?
Not by default. The keys stay in the order they appear in the original input.
Can I use this for JSONL or NDJSON?
This tool expects a single JSON object or array. For line-delimited JSON you would format each line separately.