Guide / 01
When to use it
Use it to indent an API response for review, minify a configuration value for an environment variable, or locate a syntax error before sending JSON to another service.
DEV / 005
JSON Formatter
Format, minify, validate, and inspect structured JSON instantly.
Private workspaceYour input stays on this device. HaloBench tools run in your browser whenever possible.
Formatted JSON
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Guide / 02
Quick guide
- Paste the JSON exactly as received, including its braces and quotation marks.
- Choose Format & validate for indented output or Minify for a compact single line.
- If parsing fails, inspect the reported area for commas, quotes, and closing brackets, then run the check again.
CHECK
Validate the result
Parse the formatted output again or minify it; if the same keys, arrays, and values remain, only insignificant whitespace has changed.
LIMITS
Know the limits
Comments, trailing commas, and single-quoted keys are not valid JSON. Duplicate keys may collapse to the final value, and integers beyond JavaScript's safe range can lose precision.
Reference
Input and output example
Actual output depends on your input and browser environment. Verify any value used for an important decision.
- Example input
{"name":"HaloBench","tools":33}- Expected output
Validated · indented JSON
FAQ
Frequently asked
Why do I get an Unexpected token error when the JSON looks correct?
Common causes are a comma after the final item, an unescaped line break inside a string, or single quotes around a key. Inspect the characters immediately around the reported position.
Does my data leave this device?
No. This tool is designed to process its working data in your browser. Advertising may load separately, but your tool input is never sent with it.