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What is JSON validation?
JSON validation checks that your text follows the JSON grammar: matching curly braces and square brackets, double-quoted keys and strings, commas between values, and no trailing commas. Invalid JSON breaks REST clients, GraphQL tooling, config loaders, and CI pipelines—catching mistakes early saves production incidents.
How to use this tool
Paste or type JSON in the editor. You get live feedback with line and column hints. When the document is valid, use the toolbar for format, minify, sort keys, and tree view—the /json app page offers the same editor if you prefer the classic toolkit layout.
Use cases
Debug API responses and webhooks before integrating. Validate package-style configs and IaC snippets. Clean malformed JSON from logs or support tickets. Prepare sample payloads for docs and tests.
Privacy and security
Your JSON is processed in the browser—it is not uploaded to our servers for this workflow. Clear sensitive data when you are done, especially on shared machines.