JSON Formatter — Clean and Validate JSON

Paste messy JSON — in one click it changes into a clean, readable format, or you can make it smaller (minify). If there is a mistake, its location will be shown too. Your data is never uploaded — all the work happens in the browser.

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      ⬇ JSON Download

      

    

  


  

    
How to Use

    
    
      
  1. Paste JSON — an API response, a config file or any JSON text.
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  2. Press Beautify for a readable format; Minify gives a smaller one-line version.
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  3. If there is a mistake, the error message will show its position — fix that spot and try again.
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  4. Copy the result or download the .json file.
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Frequently Asked Questions

    
What happens if the JSON is invalid?
The tool shows an error saying where the mistake is — for example, a missing comma or a wrong quote. Common mistakes: use double quotes ("...") instead of single quotes ('...'), and do not put a comma after the last item.

    
What is the difference between Beautify and Minify?
Beautify indents JSON to make it easy to read; Minify removes all extra spaces and line breaks to make it one line, which makes the file smaller and better for sending to an API or a website.

    
Does my data go to a server?
No. All the work happens in your browser — JSON is never uploaded, so it is safe to paste API keys or sensitive data here too (even so, think before sharing real secret keys).

    
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Disclaimer: This tool only formats and validates JSON — you are responsible for the correctness of the data (correct values, correct types).