Useful for
- Format, validate, encode, decode, inspect, or generate developer-friendly values.
- Troubleshoot copied snippets before adding them to a project.
- Prepare quick examples for documentation, testing, support, or debugging.
JSON Validator
Validate JSON and find syntax errors quickly.
Status
-
Tool guide
How to use JSON Validator
JSON Validator gives you a focused way to handle one small task quickly. Validate JSON and find syntax errors quickly. It is free to use, requires no login, and is built for quick checks when you need a practical result.
Example
For example, use JSON Validator while checking an API response, preparing a test value, inspecting a URL, or cleaning up code-adjacent text.
Good to know
Most developer utilities run in your browser. Avoid pasting secrets, API keys, passwords, or private production data into any online tool.
How it works
The JSON validator checks whether text is valid JSON and reports syntax errors. It is useful before sending payloads to APIs or saving configuration files.
The tool attempts to parse the text as JSON and reports success or the parser error.
Practical examples
- Check a webhook payload before testing.
- Validate a config block copied from documentation.
- Find a missing comma in a nested object.
Common mistakes
- JavaScript object syntax is not always valid JSON.
- Comments are not allowed in standard JSON.
Questions
Is JSON the same as a JavaScript object?
No. JSON has stricter syntax rules.
Can arrays be valid JSON?
Yes. A JSON document can be an object, array, string, number, boolean, or null.