- How do I format JSON online?
- Paste your JSON into the Input box and click Format. The tool pretty-prints it with your chosen indentation — 2 spaces, 4 spaces, or tabs — and applies color-coded syntax highlighting for keys, strings, numbers, and literals.
- How do I validate JSON online?
- Paste your JSON and click Format. The validator runs directly in your browser and reports immediately whether the input is valid JSON. If not, it shows the exact line and column where the error occurred, with the problem character highlighted in red.
- How do I check if my JSON is correct?
- Use the built-in JSON checker: paste your text and click Format. A green "Valid JSON" status confirms the input is well-formed. A red status pinpoints the error with its exact location and a snippet highlighting the offending character.
- Does my JSON data leave my browser?
- No. All formatting, validation, and checking runs entirely in your browser using the built-in
JSON.parse and JSON.stringify functions. Your JSON is never sent to any server.