Formateador JSON
Pega JSON para formatearlo, validarlo o minificarlo instantáneamente. Incluye vista de árbol interactiva con colapso de nodos, búsqueda de rutas, conteo de elementos y copia con un clic. 100% en el navegador.
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What is JSON Formatting?
JSON (JavaScript Object Notation) formatting is the process of adding proper indentation, line breaks, and spacing to raw JSON data to make it human-readable. JSON formatters also validate the syntax, detecting missing brackets, trailing commas, and other common errors. Well-formatted JSON is essential for debugging APIs, configuring applications, and sharing data between developers. This tool formats, validates, and visualizes JSON entirely in your browser — no data is ever sent to any server.
How to Use This JSON Formatter
- Paste your JSON data into the input area, or click 'Sample Data' to load an example
- Choose your indentation style: 2 spaces, 4 spaces, or tabs
- Click 'Format' to beautify the JSON with proper indentation
- Switch to 'Tree View' to explore nested structures interactively
- Click any node in the tree to copy its JSONPath for use in code
- Use 'Minify' to compress JSON for production use or API payloads
- Use 'Compare' tab to find differences between two JSON documents
Frequently Asked Questions
Is my JSON data safe when using this formatter?
Yes. This JSON formatter processes everything 100% in your browser using JavaScript. Your data never leaves your device — no server requests, no cookies, no tracking. You can verify this by using the tool with your network tab open: zero outbound requests are made with your data.
What is the maximum JSON size this tool can handle?
This tool can handle JSON files up to several megabytes depending on your browser and device. For typical API responses (under 1 MB), formatting is nearly instant. For larger files (1-10 MB), the tree view may take a moment to render. The formatter uses efficient parsing and lazy rendering for optimal performance.
How do I find a specific key in deeply nested JSON?
Use the Tree View tab and type the key name in the search box. The tree will highlight all matching keys and values, making it easy to locate specific data in complex nested structures. You can also click any node to copy its full JSONPath (e.g., $.users[0].address.city) for use in your code.
What JSON syntax errors does the validator detect?
The validator detects all JSON syntax errors including: missing or extra commas, unclosed brackets and braces, unquoted keys, single quotes instead of double quotes, trailing commas (not allowed in strict JSON), invalid escape sequences, and unexpected tokens. Error messages include the exact line and column number.
Can I compare two JSON objects to find differences?
Yes. The Compare tab lets you paste two JSON documents side by side and highlights all differences: added keys (green), removed keys (red), and changed values (yellow). Each difference shows the JSONPath location so you can quickly identify exactly what changed between two API responses, config files, or data exports.
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