Everything JSON in one powerful place.
Supports common features like formatting, validation, compression, conversion, comparison, and JSONPath queries.
JSON Formatter
Format, validate and minify your JSON data.
JSON Converter
Convert JSON to CSV, XML, YAML and more.
JSON Diff
Compare two JSON files and highlight differences.
JSONPath Query
Extract and query JSON data using JSONPath.
JWT Decoder
Decode JWT tokens and view payload.
JSON Schema Validator
Validate JSON data against a JSON Schema.
Understanding JSON
Structure
Built on two structures: A collection of name/value pairs (Object) and an ordered list of values (Array).
Value Types
JSON supports Strings, Numbers, Objects, Arrays, Booleans, and Null.
Syntax Rules
Data is in name/value pairs, data is separated by commas, curly braces hold objects, and square brackets hold arrays.
Common Scenarios
API Integration
Debugging data coming from REST or GraphQL endpoints.
Configuration Management
Editing complex package.json, tsconfig.json, or docker-compose files.
Data Migration
Converting JSON exports from databases to CSV for reporting.
Frequently Asked Questions
What does JSON stand for?
JSON stands for JavaScript Object Notation. It is a lightweight data interchange format based on a subset of JavaScript. It uses a text format that is completely independent of language, easy for humans to read and write, and easy for machines to parse and generate.
What are the main features of JSON?
JSON is concise, readable, and writable, with good cross-platform compatibility. It supports multiple data types, including strings, numbers, booleans, arrays, objects, and null. JSON has become one of the most commonly used data interchange formats in web applications.
What is the difference between JSON and XML?
JSON is more concise and readable than XML, and has faster parsing speed. JSON uses key-value pairs to represent data, while XML uses tags. JSON supports arrays natively, while XML requires additional markup. In web development, JSON has gradually replaced XML as the main data interchange format.
What are the basic syntax rules of JSON?
The basic syntax rules of JSON include: using key-value pairs to represent data, key names must be in double quotes, strings must be in double quotes, numbers can be integers or floating-point numbers, boolean values are true or false, arrays use square brackets [], objects use curly braces {}, and different items are separated by commas.
Is my data safe?
Absolutely safe. All data processing happens locally in your browser and is not uploaded to any server. Your data privacy is fully guaranteed.
Is JSON Master free to use?
Yes, JSON Master is completely free for all users. You can use all features including formatting, conversion, comparison, etc. without any cost.