Developer
JSON Validator
Paste JSON to check its syntax without reformatting it. Invalid input displays the browser parser’s message. A line and column are added when that message includes a character position; location details depend on your browser. Syntax validation does not check a schema or the meaning of the data.
Tool workspace
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Frequently asked questions
How is the error location found?
When the browser parser’s message includes a character position, the tool converts it into a line and column. Some parser messages do not provide that position, so the additional location is not always available.
Does this tool reformat my JSON?
No — for formatting or minifying valid JSON, use the JSON Formatter tool instead.