JSON validator & beautifier
JSON validator & beautifier checks JSON objects and arrays and presents indented output. Check syntax errors and the limits for standalone false, zero, or null.
JSON validator & beautifier helps you inspect a JSON object or array and obtain an indented representation that is easier to read during debugging and data review. Start with a representative sample of your actual task. Read the form labels and the returned value before replacing text, a link, or a code fragment that is already in use.
How to use JSON validator & beautifier
- Paste JSON text with quoted property names.
- Select Submit.
- Read the formatted output or reported error before copying.
Worked example
{"name":"Ana","active":true} is a simple object example. Pretty printing adds layout around the same values instead of turning the object into an application schema.
Limits and checks
This implementation can reject valid primitive values such as 0, false, or null because it checks the decoded value for truthiness. Formatting is not JSON Schema validation, duplicate-key detection, or a guarantee about large-number precision.
Frequently asked questions
Does the appearance prove the result is correct?
No. Compact or readable output does not check every rule of its destination. Compare syntax, values, and behavior in an appropriate environment before using the result in production.
Why might valid false, 0, or null be reported as an error?
The implementation checks whether the decoded result is truthy. That test can reject valid JSON primitives, so an error for those values does not by itself establish invalid JSON syntax.
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