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§ · free tool

Code formatter & minifier. Readable or tiny — locally.

Beautify or minify JSON, CSS, HTML and JavaScript on your device. Strict JSON parsing with exact error positions, conservative formatters that never rewrite your logic — nothing is uploaded.

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A free online tool by Digital Heroes

Your code never leaves your browser. Nothing is uploaded.

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JSON uses a strict parser. CSS, HTML and JS use conservative formatters that preserve strings, comments and your code — they re-indent and normalize whitespace rather than rewriting syntax.

        


        

          
Formatting, without the toolchain

          
Sometimes you just need one config file readable or one snippet small — without installing Prettier, spinning up Node, or pasting proprietary code into a stranger's server. This formatter tokenizes your input first, so strings, template literals, regex and comments are never touched; only structure and whitespace change. JSON goes through the browser's strict parser, so errors come back with the exact line and column. Minifying shows the honest before → after byte count and percentage saved. Pick your indent, copy or download, done — no account, nothing uploaded, free forever.

        

      

    


    
    

      

        

          
§ 02 · what you can do

          
Four languages, both directions.

          
    
            
  • Beautify JSON with strict parsing and clear error messages showing the exact line and column.
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  • Format CSS into readable, properly indented blocks while preserving strings and comments.
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  • Prettify HTML with consistent indentation and correct handling of void tags and raw blocks (script, style, pre, textarea).
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  • Format JavaScript conservatively — strings, template literals, regex literals and comments are tokenized first and never altered.
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  • Minify any supported language and see the exact byte savings and percentage reduction in the status line.
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  • Choose your indent style — 2 spaces, 4 spaces or tabs — then copy or download the result instantly.
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§ 03 · how to use it

          
Four steps, no install.

          
    
            
  1. Select the language tab: JSON, CSS, HTML or JavaScript.
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  2. Paste your code into the input panel, or click Load sample to try an example. The Tab key indents inside the editor.
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  3. Pick an indent style and click Beautify — or click Minify to shrink it and see the byte savings.
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  4. Copy or Download the result with the right file extension. Your code stays on your device the whole time.
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§ 04 · faq

          
Frequently asked questions.

          

            

              Is the Code Formatter free?
              
Yes — completely free for everyone. No sign-up, no account and no usage limits.

            

            

              Is it private? Is my code uploaded anywhere?
              
No upload, ever. Formatting and minifying run entirely in your browser on your own device — your code never leaves your computer and nothing is sent to a server.

            

            

              Will it change how my code behaves?
              
No. JSON is re-serialized by the browser's strict parser, so it stays semantically identical. CSS, HTML and JavaScript go through conservative formatters that tokenize strings, comments, template literals and regex first, then only re-indent and normalize whitespace — your logic and content are never rewritten.

            

            

              Why does my JSON fail to format?
              
The JSON mode uses a strict parser, so things like trailing commas, single-quoted strings, comments or unquoted keys are rejected. The error message shows the exact line and column of the first problem so you can fix it fast.

            

            

              How much smaller does minifying make my files?
              
It depends on how much whitespace and how many comments your code carries — the status line shows the exact before → after byte sizes and the percentage saved on every run. Comments are stripped and whitespace collapsed; strings and logic are left intact.

            

            

              Does it work offline?
              
Yes — once the page has loaded, every feature (beautify, minify, copy, download) works without a connection, because all the logic runs locally in your browser.

            

          

        

      

    


    
    

    
    

    
    
    


    

    

    

    

    

    
    

      

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