Key features
- Check JSON syntax in the browser.
- Review line and column diagnostics for invalid JSON.
- See object, array, key, value, depth, and size counts.
- Copy, upload, download, format, and minify JSON from one toolbar.
JSON syntax checker
JSON Validator Online
Paste JSON and instantly check whether it is valid. DataMagics highlights syntax problems, simple trailing comma warnings, structure statistics, and tree inspection in the same validator workspace.
Related tools
Practical use cases
- Find JSON syntax errors
- Review line and column issues
- Validate API payloads
- Check JSON Schema rules
Frequently asked questions
What does a JSON validator do?
It parses JSON text and reports whether the syntax is valid according to the JSON format.
Can I validate large nested JSON?
Yes. The editor and tree view are designed for nested objects and arrays.
What is the difference between validate and beautify?
Validation checks correctness. Beautify reformats valid JSON with readable spacing and indentation.
Does the validator support JSON Schema?
The JSON engine includes schema validation support, and the diagnostics workspace is prepared for advanced schema checks.