Free Online JSON and XML Formatter, Validator & Converter
JSON/XML Formatter is a fast, browser-based utility for developers, testers, and data analysts who work with structured data every day. Paste your JSON or XML, choose an action, and get instant results without installing software or creating an account.
Use it to pretty-print minified API responses, validate configuration files before deployment, shrink payloads for production, or convert data between JSON and XML. Every operation runs locally in your browser, so sensitive documents never leave your device.
Switch between JSON and XML modes with the tabs above, then try Format, Minify, Validate, Convert, or explore nested structures with the interactive Grid View.
Features
Format
Beautify your code with proper indentation.
Minify
Remove all unnecessary whitespace.
Validate
Check syntax errors with line numbers.
Convert
Bidirectional JSON ↔ XML conversion.
Grid View
XMLSpy-style spreadsheet grid for JSON and XML exploration.
Common Use Cases
Debugging API responses
Paste raw JSON from an API call, format it for readability, and validate it to catch syntax errors before using it in your application.
Cleaning configuration files
Format XML configs such as web.config, AndroidManifest.xml, or SVG files so diffs are clean and teammates can review changes easily.
Reducing payload size
Minify JSON or XML before sending it over the network or storing it in a database to save bandwidth and disk space.
Converting between formats
Turn JSON payloads into XML for legacy systems, or convert XML data into JSON for modern APIs and JavaScript applications.
Explore Data Like a Pro with Grid View
Most free JSON and XML tools only show raw text. Our unique XMLSpy-style Grid View turns complex documents into an interactive spreadsheet with collapsible rows and columns, making it easy to inspect nested objects, compare repeated elements, and spot missing fields at a glance.
Whether you are reviewing an API response, auditing a config file, or exploring a large XML dataset, Grid View gives you a level of clarity that plain text cannot match. It is one of the features that sets this formatter apart from other free online tools.
Learn how to use Grid View →Tips
- • Click Format to format your code with proper indentation
- • Click Grid View to explore your data in an XMLSpy-style spreadsheet grid
- • Click the arrow (▶/▼) next to nodes to expand or collapse branches
- • Click ⛶ Full in the output panel to view in fullscreen mode. Press ESC to exit.
- • All processing happens in your browser — your data never leaves your device
Popular Guides
How to Validate JSON and XML Data Effectively
Fix syntax errors fast with online validation.
Top 10 JSON and XML Formatting Tips
Keep your data clean and readable.
A Step-by-Step Guide to Converting JSON to XML
Move between formats in seconds.
How to Use Grid View to Simplify Data Exploration
See why our XMLSpy-style Grid View stands out.
Understanding JSON Minification
Shrink payloads without losing meaning.
Ultimate Checklist for Formatting JSON and XML Files
Never miss a formatting step again.
Frequently Asked Questions
Is this JSON/XML tool free to use?▼
Yes. All formatting, validation, minification, and conversion features are completely free. No registration or payment is required.
Is my data safe when using this tool?▼
Yes. Everything is processed inside your browser. Your JSON or XML data is never uploaded to our servers or stored anywhere.
What is the difference between formatting and minifying?▼
Formatting adds indentation and line breaks to make data readable. Minifying removes all unnecessary whitespace to create the smallest possible file.
Can I convert JSON to XML and back again?▼
Yes. Switch to JSON mode and click Convert to XML, or switch to XML mode and click Convert to JSON. Both directions are supported.
What is Grid View used for?▼
Grid View renders JSON or XML as a collapsible spreadsheet, making it easy to inspect nested objects, compare repeated elements, and spot missing fields quickly.