JSON Tools

JSON (JavaScript Object Notation) is the standard data format for APIs, configuration files, and web applications. Use these free tools to format, validate, convert, and compare JSON — entirely in your browser.

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JSON Formatter & Validator
Format, validate, beautify, and minify JSON with syntax highlighting and error detection.
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JSON Converter (CSV/XML/YAML)
Convert JSON to CSV for spreadsheets, XML for legacy systems, or YAML for config files. Download the result.
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JSON Diff / Compare
Compare two JSON objects side by side. See added, removed, and changed keys with color-coded highlighting.
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What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is built on two universal data structures: objects (key-value pairs in curly braces) and arrays (ordered lists in square brackets). JSON supports strings, numbers, booleans, null, nested objects, and arrays.

JSON has become the de facto standard for data exchange on the web. REST APIs, GraphQL responses, NoSQL databases (MongoDB, CouchDB, Firebase), configuration files, and frontend-backend communication all use JSON extensively.

ToolPlex JSON Tools

Use the JSON Formatter & Validator to prettify minified JSON, validate syntax, and catch errors like trailing commas or unquoted keys. The JSON Converter transforms JSON into CSV (for spreadsheets and data analysis), XML (for legacy systems and SOAP services), or YAML (for Docker Compose, Kubernetes, and CI/CD config files). The JSON Diff tool compares two JSON objects side by side, highlighting additions, removals, and changes — perfect for debugging API responses or auditing configuration changes.

All tools run entirely in your browser. No data is sent to any server, no login is required, and everything is completely free.