JSON Converter

Format, minify, and convert JSON, XML & strings — all in your browser. No data leaves your device.

Why Use JSONConverter.pro?

🔒

100% Private

All processing happens in your browser. Your data is never sent to any server.

⚡

Instant Results

No waiting. Conversions happen instantly on your device without any network delay.

🅾

Free Forever

No sign-up, no subscription. Every feature is completely free to use.

How to Use This Tool

  1. Select a conversion mode from the buttons above (e.g., "JSON Pretty", "XML → JSON").
  2. Paste or type your input data into the left text area.
  3. Click the Convert button to process your data.
  4. The result appears instantly in the right text area.
  5. Use Copy Output to copy to clipboard, or Download to save as a file.

Supported Conversions

JSON PrettyFormats raw or minified JSON into readable, indented output.
JSON MinifyRemoves whitespace from JSON for compact storage or transmission.
XML → JSONConverts XML documents into equivalent JSON structure.
JSON → XMLConverts a JSON object into a well-formed XML document.
String → JSONParses escaped JSON strings into formatted JSON objects.
JSON → StringSerializes JSON into an escaped string for use in code.
URL EncodeEncodes special characters in a URL using percent-encoding.
URL DecodeDecodes a percent-encoded URL back into readable text.

Frequently Asked Questions

What is JSON and why is it used? +
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is widely used in web APIs, configuration files, and data storage because it maps directly to data structures like objects, arrays, strings, numbers, and booleans.
Is my data safe when using this tool? +
Yes, completely. All conversions are performed entirely in your browser using JavaScript. No data is ever sent to our servers or stored anywhere. You can even use this tool while offline once the page has loaded.
What is the difference between JSON Pretty and JSON Minify? +
JSON Pretty formats your JSON with proper indentation and line breaks, making it human-readable. JSON Minify does the opposite — it strips all unnecessary whitespace to produce the most compact representation possible, useful for reducing file size in production environments.
Can I convert large JSON files? +
Yes. Since processing happens locally in your browser, there is no file size limit imposed by a server. However, very large files (several MBs) may be slow depending on your device's performance.
What is URL encoding used for? +
URL encoding (percent-encoding) converts characters that are not allowed in a URL — like spaces, &, and = — into a safe format. For example, a space becomes %20. This is essential when passing data as query parameters in a URL.

From the Blog

What is JSON? A Beginner's Guide

Learn what JSON is, why it was created, and how it is used in modern web development.

JSON vs XML: Key Differences

A practical comparison of JSON and XML — when to use each format and why JSON won the web.

10 Common JSON Errors and Fixes

Trailing commas, unquoted keys, and more — the most frequent JSON mistakes and how to fix them.
View all articles →