JSON Validator
Validate JSON syntax and get clear, human-readable error messages.
Paste JSON to check whether it's valid.
What is this tool?
A JSON Validator checks whether a block of text is valid JSON and explains what is wrong when it is not.
How does it work?
The tool attempts to parse your input and surfaces any parsing error in plain language.
How to use JSON Validator
- Paste your JSON.
- See instant valid/invalid feedback.
Common Use Cases
- Verifying config files
- Checking API payloads
- Learning JSON syntax
Pro Tips
- JSON keys must use double quotes — single quotes are invalid.
Frequently Asked Questions
What does it check?
It verifies that your input is syntactically valid JSON and reports the first error.