API debugging
Format request and response bodies so nested fields, arrays, and null values are easier to scan.
JSON Formatter
Format, validate, and minify JSON locally
Paste JSON into the editor to check whether it is valid, convert it into readable indentation, minify it for transport, and inspect basic structure. The tool runs in your browser and does not upload JSON to AAAI Tools servers.
Waiting
Validation status
0
Input characters
0
Objects, arrays, and values
What this formatter does
- Validates syntax. It checks quotes, commas, braces, brackets, numbers, booleans, null values, and string escaping with the browser JSON parser.
- Formats for review. Pretty output uses two-space indentation, which is easy to read in docs, issue reports, and API debugging notes.
- Minifies for transfer. Compact JSON removes unnecessary whitespace when you need to paste a payload into a request body or configuration field.
Common uses
A local JSON formatter helps when you need a fast check before sharing data with teammates, saving a config file, or debugging an API response.
Config cleanup
Validate JSON configuration before pasting it into a service dashboard, build script, or deployment setting.
Documentation
Create readable examples for issue reports, guides, handoff notes, or internal support instructions.
JSON formatter FAQ
Does this support JSON with comments?
No. Standard JSON does not allow comments or trailing commas. Remove them before formatting.
Why does a valid JavaScript object fail here?
JSON is stricter than JavaScript object syntax. Keys and strings must use double quotes, and values such as undefined or functions are not valid JSON.
Is my JSON stored?
No. The pasted JSON stays in the browser tab. Clear the editor or close the tab when you are finished.