About JSON Validator: Find Syntax Errors
JSON has strict, unforgiving syntax rules — a single misplaced comma or an unescaped character breaks the entire structure, and unlike more forgiving formats, most JSON parsers won’t guess at your intent or partially recover; they simply fail. A validator’s job is telling you exactly where and why, rather than leaving you to scan the whole file manually.
This tool checks your JSON against the formal specification and reports the specific line and nature of any syntax error it finds — trailing commas, missing quotes around keys, mismatched brackets, and similar issues that are easy to introduce but tedious to spot by eye in a large file.
Validation and formatting are related but distinct tasks: our JSON Formatter focuses on making valid JSON readable through indentation; this tool focuses specifically on confirming whether your JSON is valid in the first place, which matters most when you’re actively debugging why something won’t parse.