Advertisement
Text & data
JSON Formatter & Validator
Format, validate and minify JSON, with clear error messages that point to the problem.
🔒 Private by design: everything you type on this device and never uploaded.
How to use JSON Formatter & Validator
- Paste JSON.
- Click Format, Minify or Validate.
- Copy the output.
FAQ
Why is my JSON invalid?
Common causes are trailing commas, single quotes instead of double quotes, and keys without quotes. We show the error position.
Is my data sent anywhere?
No. Parsing uses your browser's built-in JSON engine.
Can it sort keys?
Yes. Tick “Sort keys” before formatting.
Related tools
Word CounterCount words, characters, sentences and paragraphs, and see reading time as you typeCase ConverterConvert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-caseCSV ⇄ JSON ConverterConvert CSV spreadsheets to JSON and JSON arrays back to CSVQR Code GeneratorCreate free QR codes for links, Wi-Fi, text and contact detailsPassword GeneratorGenerate strong, random passwords and passphrases using your browser's secure random number generatorUnit ConverterConvert length, weight, temperature, volume, speed, area and data units instantly