OTOneTools

Developer tool

JSON Formatter

Format JSON, minify JSON, and spot syntax errors instantly.

JSON Formatter

Format, validate, and minify JSON in your browser.

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How To Use This Tool
Enter your values, choose the relevant action, and review the instant result. Everything runs in your browser for a fast, private workflow.
Common Uses
Use it to clean API responses, configuration files, schema examples, and structured data before sharing or debugging.

      

        

          

            
Practical Examples

            
Paste an API response, format it for readability, then minify it again before storing or sharing compact data.

          

          

            
Helpful Tips

            
If formatting fails, check for missing commas, trailing commas, or unquoted property names.

          

        

      

      
FAQ
Does this upload my JSON?
No. Formatting happens locally in your browser.
Can it minify JSON?
Yes. Use the minify button to remove unnecessary whitespace.