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.
JSON Formatter & Validator helps you Format, minify and validate JSON data. This guide explains the complete browser-based workflow and the checks to make before using the result.
What the tool does
Format, minify and validate JSON data. Use it when you need a focused Developer workflow without installing additional desktop software.
Step-by-step workflow
- Paste or enter a clean sample of the source content.
- Select the action and configure any relevant options.
- Run the tool and compare the output with the original.
- Copy or download the result only after validating it.
How to check the result
Compare the output with the source, confirm that formatting and values are preserved, and test the result in its intended destination. Keep the original until the final file or text has been verified.
Privacy and compatibility
Use non-sensitive sample data when possible. Browser support, file size limits and server-side dependencies can vary by tool, so review any notices shown on the tool page.
Next step
Open JSON Formatter & Validator and follow the workflow above. Related Developer tools can help with the next stage of the task.