JSON Formatter
JSON (JavaScript Object Notation) is one of the most popular data interchange formats. It is used in REST APIs, configuration files, NoSQL databases, and inter-service communication. This tool allows you to format (prettify) unreadable JSON with indentation, minify it to reduce size, and validate the structure for correctness.
Tool Features Formatting automatically adds indentation and line breaks, making data structure clear and readable. Minification removes all extra spaces and line breaks, reducing size for network transmission. The validator checks syntax and pinpoints the exact error position — line number and character. You can choose the indentation size (2 or 4 spaces). All operations are performed locally in your browser.
Free online tool for working with JSON data. Format (prettify) unreadable JSON into a well-structured view with indentation, minify it to reduce size, or validate the structure for correctness. The tool automatically detects the error position and highlights the problematic line, significantly speeding up debugging.
JSON (JavaScript Object Notation) is one of the most popular data interchange formats, used in REST APIs, configuration files, NoSQL databases, and inter-service communication. When working with APIs, you often encounter minified JSON that is virtually impossible to read without formatting.
Our tool supports configurable indentation (2 or 4 spaces) and one-click result copying. All operations are performed locally in your browser — your data is never sent anywhere. Perfect for developers, testers, and anyone working with APIs and configuration files.