Developer Tools · Local processing
JSON Formatter & Validator
Validate JSON, format it for reading or minify it.
Your workspace Nothing to install. No signup.
How to use JSON Formatter & Validator
This parses strict JSON, which does not permit comments or trailing commas. Large integers may lose precision under JavaScript number rules; do not use it to preserve integers beyond 15–16 digits.
01
Add your input
Enter your text or values in the workspace above.
02
Choose your settings
Review the options and limits before processing.
03
Use your result
Check the output, then save or copy what you need.
Good to know
Does this tool upload my input?
No. This tool processes your input on your device. Its libraries load from this site. Your input is not sent to a processing service.
What should I check before using the result?
This parses strict JSON, which does not permit comments or trailing commas. Large integers may lose precision under JavaScript number rules; do not use it to preserve integers beyond 15–16 digits.
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