JSON Formatter

Format, beautify and validate JSON data with syntax highlighting.

About the JSON Formatter

The JSON Formatter instantly beautifies and validates any JSON string. Paste minified or poorly formatted JSON and it returns a clean, indented, human-readable version. The tool also validates structure and highlights the exact line of any syntax error.

JSON (JavaScript Object Notation) is the universal data format for APIs, configuration files, and web applications. Readable, well-formatted JSON is essential for debugging, documentation, and code review. Our formatter handles nested objects, arrays, strings, numbers, booleans, and null values correctly.

⚙️ JSON Formatter & Validator


                

            


            
            

            

                
                
                
                
            

        


        

            
How to Use

            
    
                
  1. Paste your JSON string into the Input JSON box on the left.
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  2. Click Format JSON to beautify with 2-space indentation.
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  3. Use Minify to compress JSON into a single line.
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  4. Any syntax errors appear in red with the specific issue described.
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Features

            
    
                
  • Instant JSON beautification with 2-space indentation
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  • JSON minification (compress to single line)
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  • Syntax validation with descriptive error messages
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  • Handles nested objects, arrays, and all JSON data types
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  • No character or file size limits
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  • Fully client-side — data never leaves your browser
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Frequently Asked Questions

            

                

                    
                    

                        

                            JSON formatting (or "pretty printing") adds indentation and line breaks to a compact JSON
                            string, making it easier for humans to read and debug.
                        

                    

                

                

                    
                    

                        

                            Formatting adds whitespace for readability. Minifying removes all unnecessary whitespace
                            to reduce file size, which is useful for API responses and production deployments.
                        

                    

                

                

                    
                    

                        

                            Yes. All processing happens in your browser using JavaScript. Your JSON is never sent to
                            any server, so sensitive data stays private.
                        

                    

                

            

        


            

        
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