JavaScript Input
Ready 

          

        

      

      


      

        

          

            
JavaScript Formatter Guide

            
JavaScript formatter and beautifier online

            
Use this JavaScript Formatter to turn compressed, messy or copied JS into readable code with clean indentation and line numbers. It is built for developers reviewing snippets, debugging browser code, cleaning source copied from builds, and preparing JavaScript for collaboration.

          


          

            

              format_indent_increase
              
Readable JavaScript

              
Beautify JavaScript with consistent whitespace, line breaks, semicolons and 2-space indentation for easier scanning.

            

            

              code_blocks
              
Prettier-powered output

              
The formatter uses browser Prettier plugins for JavaScript so functions, objects, arrays, conditions and blocks follow familiar code style.

            

            

              lock
              
Browser-based formatting

              
Your code is formatted in the browser. It is not uploaded to devbruh servers just to beautify JavaScript.

            

          


          

            

              
What is JavaScript?

              

                
JavaScript is a high-level programming language used to build interactive websites, web apps, browser features, server-side services, scripts and developer tooling. It began as a way to make web pages interactive, but today it runs across front-end and back-end environments.

                
Because JavaScript is used in so many projects, code often moves between browsers, build tools, API clients, documentation, logs and teammates. A readable format makes it easier to understand functions, callbacks, imports, objects, arrays, loops and conditional blocks.

                
Minified or compact JavaScript can save space, but it is difficult to debug. A JavaScript beautifier expands the code into a consistent structure so you can review it without mentally counting braces and nested blocks.

              

            


            
          


          

            
What can this JavaScript beautifier do?

            

              
Improve indentation: Turn single-line or poorly spaced JavaScript into readable blocks with consistent indentation.

              
Clean code reviews: Format snippets before sharing them in pull requests, documentation, tickets or team chats.

              
Debug copied code: Reformat JavaScript from browser consoles, bundled snippets, examples and pasted files to inspect structure faster.

              
Catch parser issues: Invalid JavaScript returns a formatter error, which helps you find syntax problems before using the code elsewhere.

            

          


          

            

              
JavaScript formatter example

              
A compact function becomes much easier to read after formatting.

              

                

                  
Unformatted JavaScript

                  
function calculateTotalPrice(quantity,price){if(quantity>0&&price>0){let totalPrice=quantity*price;return totalPrice;}else{return 0;}}

                

                

                  
Formatted JavaScript

                  
function calculateTotalPrice(quantity, price) {
  if (quantity > 0 && price > 0) {
    let totalPrice = quantity * price;
    return totalPrice;
  } else {
    return 0;
  }
}

                

              

            


            

              
Related formatter tools

              
After beautifying JavaScript, you may also want to minify code, format CSS, clean HTML or prepare structured data.

              

                JS Minifier
                CSS Formatter
                HTML Formatter
                SQL Formatter
                JSON Formatter
              

            

          


          

            
JavaScript Formatter FAQ

            

              

                What does this JavaScript Formatter do?
                
It formats and beautifies JavaScript code into readable output with consistent indentation, spacing, line breaks and line numbers. It is useful for reviewing minified snippets, debugging pasted code and preparing code for collaboration.

              

              

                Why beautify JavaScript code?
                
Beautified JavaScript is easier to read and maintain. Clear indentation shows which statements belong inside functions, loops, conditions and object structures, which makes bugs easier to spot.

              

              

                Is my JavaScript code saved?
                
No. Formatting runs in your browser and the page does not submit your JavaScript to devbruh servers. Be careful with secrets, credentials and private source code in any online tool.

              

              

                Which formatting engine is used?
                
This page uses browser-loaded Prettier with JavaScript parser plugins. That gives consistent formatting for common JavaScript syntax, functions, arrays, objects, imports and expressions.

              

              

                Can the formatter fix invalid JavaScript?
                
It formats valid JavaScript and shows a parser error when the input is invalid. It can help locate syntax issues, but it does not automatically repair broken logic or rewrite incomplete code.

              

            

          


          

            
Learn more about JavaScript

            
These references are useful when you want to understand JavaScript syntax, language behavior and formatting conventions in more depth.

            

              MDN JavaScript
              ECMAScript
              Prettier docs