Format, validate, and minify JSON directly in your browser. Paste JSON data to make it easier to read, check for syntax errors, or create a compact version for sharing and development use. Your input is processed locally on your device and is not sent to our servers.
Paste JSON text into the editor. You can also use the sample button to test the tool.
Select Format to make the JSON readable, Minify to remove unnecessary whitespace, or Validate JSON to check whether the syntax is valid.
Copy the output to your clipboard or download it as a .json file for local use.
Note: If the JSON contains a syntax error, correct the issue shown by the validator before formatting or using the data in an application.
Make compact or difficult-to-read JSON easier to review with consistent indentation.
Check whether your JSON uses valid syntax and identify parsing errors before using it in an application or API.
Remove unnecessary spaces and line breaks to create a smaller JSON version for supported workflows.
The tool is designed to process pasted JSON locally in your browser, without sending it to our servers.
Copy the formatted result or save it as a .json file when needed.
The interface is designed for desktop and mobile browsers. Performance may vary with very large JSON input.
JSON, short for JavaScript Object Notation, is a text-based format commonly used to exchange structured data between websites, applications, APIs, and services.
JSON is easy for software to read, but compact JSON can be difficult for people to inspect. Formatting adds indentation and line breaks so nested objects and arrays are easier to understand. Minifying removes unnecessary whitespace while keeping the same JSON data structure.
For JSON to be valid, object keys and text values must use double quotes, commas must separate items correctly, and brackets must be properly closed. This tool can help you format valid JSON and identify syntax problems in invalid input.
Important: JSON formatting changes the presentation of the data, not its meaning. Minifying JSON does not encrypt, protect, or secure the information inside it.
This tool checks standard JSON syntax. It does not verify specific API requirements, required fields, data types, business rules, or custom JSON Schema unless a separate schema-validation feature is provided.
JSON does not support comments, trailing commas, single-quoted strings, undefined, functions, or unquoted object keys. Data written in JavaScript object notation may look similar to JSON but can still be invalid JSON.
Very large JSON files may use significant browser memory and can take longer to format, validate, or minify depending on your device and browser.
Avoid pasting passwords, API keys, private tokens, personal records, or confidential data into any online tool unless you understand your organization's security requirements.
JSON stands for JavaScript Object Notation. It is a text-based format used to store and exchange structured data between applications, websites, APIs, and services.
It can format valid JSON with indentation, minify JSON by removing unnecessary whitespace, and check whether pasted JSON has valid syntax.
Common causes include missing commas, unmatched brackets, single quotes instead of double quotes, trailing commas, unquoted keys, or text values that are not enclosed in double quotes.
Formatting adds indentation and line breaks so JSON is easier to read. Minifying removes unnecessary spaces and line breaks to make the JSON more compact. Neither option changes the meaning of valid JSON data.
This tool validates standard JSON syntax. JSON Schema validation is different because it checks whether JSON follows a defined structure, such as required fields, allowed values, or data types.
The tool is designed to process pasted JSON locally in your browser, without sending it to our servers. Still, avoid entering passwords, API keys, access tokens, or confidential information unless you understand the security requirements of your environment.
No. Standard JSON requires double quotes around object keys and text values. Single quotes are common in JavaScript code but are not valid JSON.
No. Standard JSON does not support comments. Remove comments before validating or formatting JSON.
The tool can identify syntax errors, but it may not be able to safely determine what the intended data should be. Review and correct invalid characters, commas, quotes, and brackets manually.