Format and validate
JSON Formatter
Clean up raw API payloads, prettify messy objects, or compact valid JSON before you paste it somewhere else.
- Pretty-print or compact valid JSON
- Inline validation feedback for malformed input
- Copy-ready output without leaving the page
JSON Formatter
How to use
Step 1
Paste the JSON you want to inspect
Drop in a response payload, config object, or local snippet. The formatter accepts full JSON documents and arrays.
Step 2
Choose readable or compact output
Use pretty mode to inspect structure or compact mode when you need a single-line result for transport and storage.
Step 3
Copy the result or fix the syntax error
If the input is invalid, the tool returns an error message. Once valid, copy the formatted output directly.
FAQ
Does this tool send my JSON to a server?
No. The formatter is designed to run locally in the browser for the core formatting workflow.
Can it fix broken JSON automatically?
No. It validates input and returns an error when the syntax is invalid, but it does not guess missing commas or quotes.
What is the difference between pretty and compact output?
Pretty output adds indentation and line breaks for readability. Compact output removes extra whitespace to keep the JSON small.
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