The Ultimate JSON Formatter and Validator

JavaScript Object Notation (JSON) is the universal data language of the modern web, serving as the backbone for countless APIs, configuration files, and database records. However, raw JSON data is often minified into a single, unreadable line of text. Our free online JSON Formatter and Validator is built for developers, analysts, and QA engineers who need to quickly parse, beautify, and debug complex JSON payloads without sending sensitive data to external servers.

Format, Beautify, and Collapse

When you paste a minified JSON string into our tool, you can instantly format it into a beautifully indented, syntax-highlighted structure. Our viewer also features interactive tree controls. You can effortlessly expand or collapse deeply nested objects and arrays to focus exactly on the data points you care about, making it incredibly simple to read massive server responses.

Instant JSON Validation

A single missing comma or unmatched bracket is enough to crash an entire application. Our built-in JSON Validator instantly checks your syntax as you work, providing detailed error messages that pinpoint exactly where your syntax went wrong. Furthermore, the validator provides an instant metadata breakdown, showing you the total number of properties, the maximum depth of your nesting, and the exact byte size of your payload.

Extract JSON Paths and Properties

When writing automated tests or mapping data models, you often need the exact "JSON Path" to a deeply nested value. Our property extraction tool does the heavy lifting for you. It automatically crawls your entire JSON structure and generates a clean list of all JSON Paths (e.g., user.address.coordinates[0].latitude) as well as a hierarchical summary of level 0 and level 1 properties. You can also simply click on any property name within the formatted viewer to instantly copy its exact path to your clipboard.

Generate JSON Schemas Automatically

Writing a JSON Schema by hand is notoriously tedious and error-prone. Our tool features a powerful Schema Generator that analyzes your custom JSON payload, inferring data types (such as strings, integers, arrays, and booleans), and automatically drafts a compliant 2020-12 draft JSON Schema. It even attempts to detect standard formats like dates, URIs, and emails automatically.

100% Secure & Client-Side

Whether you are pasting API keys, patient records, or proprietary financial data, privacy is critical. Unlike many online JSON formatters that silently log your inputs to a backend database, our JSON Tools operate entirely client-side. The parsing, validation, and schema generation all happen within the memory of your local web browser. Your sensitive data never leaves your machine.