How to Validate JSON

Problem: Ensure JSON is syntactically correct before sending to APIs or storing.

Steps

1. Open JSON Formatter to check syntax.
2. Paste JSON and run format — errors will be indicated with location.
3. For content-level checks, inspect fields using JSON Viewer.

Example invalid JSON

{"id":1,"name":"Alice",}

The trailing comma is invalid; the formatter will point to the comma location.

Related tools

• JSON Viewer
• Text Compare — compare expected vs actual JSON strings.