JSON Tools

Format JSON Online

An online formatter that pretty-prints in one click.

Format and beautify any JSON in the browser. Example: paste a raw API response and get readable, indented JSON.
Format any JSON
  1. Paste JSON.
  2. Beautify it with clean indentation.
  3. Copy it back.
Example: format a raw response into readable JSON.
Use for general-purpose JSON formatting.
Client-sideRuns entirely in your browser — your data never leaves your device.

Format JSON Online is a browser-based web developer tool on WebDevToolsBase. An online formatter that pretty-prints in one click. To use it, paste your input and view the result directly in your browser — no signup and nothing to install.

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Format JSON Online is a free JSON Tools utility that runs entirely in your browser — nothing you enter is uploaded.

JSON input
Formatted output




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How to use Format JSON Online

  
    
      
  1. Type or paste your JSON into Format JSON Online's input area.
    2. 
      
  2. Set Indent so the output fits your use case.
    3. 
      
  3. Press Format and Format JSON Online shows the result straight away.
    4. 
      
  4. When it looks right, Copy to save it.
    5. 
  

  
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About this tool

  
Format JSON Online is a static, client-side tool with no backend. Format JSON Online validates and reshapes your JSON locally with no server round-trip.

  
Because parsing is local, sensitive payloads never leave the page. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.

  
Frequently asked questions

  

      
What is Format JSON Online for?
Use Format JSON Online to format your input without installing anything using the Indent control; everything happens client-side.

      
Do I need an account for Format JSON Online?
No — Format JSON Online needs no account, sign-up or installation.

      
Where is my data processed by Format JSON Online?
Entirely in your browser — Format JSON Online keeps your data on your own machine and sends nothing anywhere.

      
Can Format JSON Online handle large or deeply nested JSON?
Yes. Format JSON Online parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.

      
Does Format JSON Online work on mobile?
Yes — Format JSON Online is just a web page and runs on any modern browser, including phones and tablets.

  

  
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