📋 JSON Formatter & Validator
Format, minify, and validate JSON locally in your browser.
Input
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How it works
How it works
This tool parses your input with JSON.parse. On success, it pretty‑prints or minifies using JSON.stringify.
- Parsing errors (unexpected token, trailing commas) are caught and reported.
- No schema validation is performed; only syntactic JSON is checked.
- Numbers are IEEE‑754; very large integers may be rounded.
Privacy & Security
All processing is local.
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Accuracy, Limits & Tips
Large JSON may be slow in the browser; no schema validation.
Examples
- Pretty-print API responses.
Related tools
- 📊 CSV → JSONConvert simple CSV to JSON.
- 🔄 JSON ⇄ Base64Encode/decode JSON with Base64.
- 🔀 YAML ⇄ JSONConvert between YAML (subset) & JSON.
- 🔠 Case ConverterLower, UPPER, Title, snake, kebab.
- 🔢 Number FormatterFormat numbers with locale separators, SI prefixes, and scientific notation.
- 🔢 Base ConverterConvert numbers between bases.
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Looking for broader guides and best practices? Visit the ToolsAreUs Blog for indexes (like the full tool list) and articles (e.g. secure password generation).