JSON Validator
Validate JSON syntax and spot parsing issues. Free, private, and local-first.
Tool facts
- Upload required
- No
- Signup required
- No
- Category
- Developer Tools
Use JSON Validator
Check JSON syntax without uploading your data.
Status
Valid
Root type
object
Size
35 bytes
Paste JSON to validate its syntax locally.
What this tool does
How to use JSON Validator
- 1
Paste your JSON text into the input field.
- 2
The validator checks syntax automatically.
- 3
Review error messages with line numbers.
- 4
Fix the issues and re-validate until clean.
Examples
Valid JSON
{"name":"CodeVella","version":1}
Invalid JSON
{"name": CodeVella}
Use cases
- Checking JSON before submitting to an API
- Validating webhook payloads
- Debugging JSON configuration errors
- Verifying JSON exported from databases
Privacy and usage notes
CodeVella tools are designed to run locally in your browser. Your input is not uploaded to a server, and no account is required.
Generated test data is intended for development, QA, demos, and safe internal workflows.
Frequently asked questions
Is my data uploaded?+
No. This tool is designed to run locally in your browser.
Do I need an account?+
No signup is required for CodeVella tools.