{ }JSONQuick

JSON Validator

Validate JSON syntax and find errors. Get exact error location and structure analysis. Free online tool.

About this tool

Paste JSON and instantly check if it is syntactically valid. If there are errors, JSONQuick reports the exact problem with a descriptive message. For valid JSON, you get a structural summary: the data type (object or array), number of top-level keys, total key count, and nesting depth. This is invaluable when debugging API responses, validating configuration files, or checking data exports before processing.

FAQ

What counts as valid JSON?

Valid JSON must start with { (object) or [ (array). Keys must be double-quoted strings. Values can be strings, numbers, booleans (true/false), null, objects, or arrays. Single quotes, trailing commas, and comments are not valid JSON.

Can it validate JSON Schema?

This tool validates JSON syntax (is it parseable?), not JSON Schema compliance (does it match a specific structure?). JSON Schema validation is a different tool that will be available in a future update.

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