Key features
- Check JSON syntax in the browser.
- See object, array, key, and value counts.
- Use the tree view to inspect nested data.
- Copy, upload, download, and format JSON from one toolbar.
JSON syntax checker
JSON Validator Online
Paste JSON and instantly check whether it is valid. DataMagics highlights syntax problems and keeps structure, stats, and tree inspection nearby.
Related tools
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.