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JSON Formatter & Validator
Paste raw JSON to get pretty-printed formatting and check for syntax errors.
JSON Statistics
JSON Formatting and Validation
JSON (RFC 8259) is the universal data interchange format for APIs, configuration files, and logs. Validation catches common errors: trailing commas, unquoted keys, single-quoted strings (JSON requires double quotes), and missing closing brackets. Formatting (pretty-printing) adds indentation for human readability — essential when inspecting API responses, Terraform state files, or Docker configs.
CLI Equivalent
echo '{"key":"val"}' | python3 -m json.tool
cat data.json | jq .
cat data.json | jq .