Direct answer
Paste JSON text into the input editor in JSON Formatter. If the input is invalid, read the validation error and correct the source; the tool cannot guess missing or extra syntax reliably.
Key takeaways
- Input {"name":"A","active":true} should remain an object with a string and a boolean after formatting.
- JSON requires double-quoted property names and does not permit trailing commas.
- Formatting changes whitespace; it does not validate the business meaning of API fields.
Common mistakes
- The implementation calls JSON.parse and JSON.stringify in the browser.
- It validates JSON syntax, not a JSON Schema.
- Very large JSON documents may be limited by available browser memory.
Learn how to use JSON Formatter & Validator safely and efficiently.
Getting started
Get Tools Lab provides a browser-based workflow for json formatter & validator. Start with a clean copy of your source content, review the available options, and keep the original data until you verify the result.
Step-by-step workflow
- Open the JSON Formatter & Validator tool.
- Enter or upload the required content.
- Choose the relevant options and run the tool.
- Review, copy, or download the result.
Quality and privacy checks
Check the output before using it in production. Avoid entering sensitive information unless you understand how the tool processes data. For file tools, keep an untouched backup.
Related tasks
Explore other Developer tools and guides to complete the rest of your workflow.