Is the XML Formatter free to use?

Yes, the XML Formatter is completely free. There are no hidden costs, no signup requirements, and no usage limits. You can format, minify, validate, and convert XML as many times as you need without any restrictions.

Does the XML Formatter store my data?

No. The XML Formatter runs entirely in your browser — all parsing, formatting, validation, and conversion happens client-side. Your XML data never leaves your device or gets sent to any server. This makes it safe to use with sensitive data like API credentials, internal configuration files, or proprietary XML formats.

What's the maximum file size I can format?

There is no hard file size limit. Since all processing happens in your browser, the limit depends on your device’s available memory. In practice, XML files up to several megabytes can be formatted without issues. Very large files (10MB+) may cause the browser to slow down, but the tool will still attempt to process them.

Does it support XML namespaces and CDATA sections?

Yes. The XML Formatter fully supports XML namespaces (e.g., xmlns:prefix="URI"), CDATA sections ( ), processing instructions ( ), comments ( ), and self-closing tags. All of these are handled correctly during formatting, minification, validation, and JSON conversion.

Can I format XML with tabs instead of spaces?

Yes. The indent selector lets you choose between 2 spaces, 4 spaces, or tab characters. Simply select your preferred option from the dropdown before or after formatting. The output will update automatically when in format mode.

What’s the difference between Format and Minify?

Formatting (also called beautifying or pretty-printing) adds indentation and line breaks to make XML human-readable. Minifying does the opposite — it removes all unnecessary whitespace between tags to produce the smallest possible output, which is useful for reducing file size when transmitting XML over networks.

How does the XML to JSON conversion work?

The XML to JSON converter transforms XML elements into JSON objects. Element attributes are prefixed with @ (e.g., @id), text content is stored under #text, and repeated child elements with the same name are converted to JSON arrays. CDATA sections are treated as text content. This makes it easy to work with XML data in modern JavaScript applications that expect JSON.

Does the XML Formatter work on mobile devices?

Yes. The tool is fully responsive and works on mobile phones, tablets, and desktop computers. On smaller screens, the input and output areas stack vertically instead of side-by-side. All features including formatting, minifying, validating, XML-to-JSON conversion, copying, and downloading work on mobile.

🛠️DevToolsHub

XML Formatter

Format and validate XML documents with proper indentation.

What is XML Formatting?

XML (eXtensible Markup Language) is a markup language designed to store and transport data. It has been a cornerstone of data exchange since the late 1990s, powering everything from SOAP web services and RSS feeds to configuration files, SVG graphics, and office document formats like OOXML and ODF. Unlike JSON, XML supports attributes, namespaces, mixed content, CDATA sections, processing instructions, and comments — making it more expressive but also more complex to read and debug in its raw form.

An XML Formatter takes compact or messy XML and transforms it into a clean, readable structure with proper indentation and line breaks. Instead of staring at a single line of angle brackets, you get a hierarchical view where each nesting level is visually distinct. This is invaluable when debugging SOAP responses, reading RSS feeds, inspecting SVG files, or editing configuration files that use XML.

DevToolsHub’s XML Formatter combines four essential functions in one tool: formatting (adding indentation for readability), minifying (stripping whitespace to reduce file size), validation (checking well-formedness and pinpointing errors), and XML-to-JSON conversion(transforming XML into JSON for use with modern APIs). Whether you are debugging a SOAP envelope, parsing an RSS feed, or converting legacy XML data to JSON, this tool handles it all.

Common use cases include: debugging SOAP API responses during development, reading minified XML from production logs, preparing XML configuration files, validating SVG markup, converting RSS feeds to JSON, inspecting SAML assertions, and understanding the structure of XML data received from third-party services. Whether you are a backend developer working with legacy APIs, a frontend engineer parsing XML responses, a DevOps engineer configuring XML-based tools, or a data analyst dealing with XML exports — a reliable XML formatter is an everyday essential.

Unlike many online tools, DevToolsHub’s XML Formatter runs entirely in your browser. Your data is never uploaded to a server, which means complete privacy and zero latency. It works offline once loaded, handles large files gracefully, and is fully responsive for use on any device.

How to Use XML Formatter

Paste or type your XMLinto the input editor on the left. You can also click “Load Example” to see how it works with a sample RSS feed.
Choose an action — click Format to beautify your XML with indentation, Minify to strip all whitespace,Validate to check for well-formedness errors, orXML → JSON to convert your XML into a JSON object.
Select your indent style from the dropdown — 2 spaces, 4 spaces, or tab characters. The output updates automatically when formatting.
Review the output in the right-hand editor. If your XML has errors, the error panel will show detailed messages about what went wrong.
Copy or downloadthe result using the buttons below the output editor. The downloaded file will be saved as “formatted.xml” (or “converted.json” for JSON output).

Features

Format (beautify) — Add proper indentation and line breaks to make XML human-readable. Supports 2 spaces, 4 spaces, or tab characters.
Minify — Strip all unnecessary whitespace to produce the smallest possible XML for production use, reducing bandwidth and load times.
Validate — Check XML well-formedness including matching tags, attribute syntax, CDATA sections, comments, and processing instructions. Get detailed error messages.
XML to JSON conversion — Transform XML into JSON with attributes prefixed by @, text content as #text, and repeated elements as arrays.
Syntax highlighting — Color-coded output makes elements, attributes, and values instantly distinguishable.
Multiple indent options— Choose between 2 spaces, 4 spaces, or tab characters to match your project’s style guide.
100% client-side (privacy-first) — All processing happens in your browser. Your data never touches a server, making it safe for sensitive XML.
Dark mode — Fully supports dark and light themes, automatically following your system preference.

XML vs JSON

XML and JSON are the two dominant formats for data exchange on the web. While JSON has largely replaced XML in modern REST APIs, XML remains widely used in enterprise systems, SOAP web services, RSS/Atom feeds, SVG graphics, office document formats, and many configuration systems. Understanding the differences helps you choose the right format for your needs.

XML Advantages

Attributes — XML elements can have attributes, providing metadata without nested elements.
Namespaces — Built-in namespace support avoids element name collisions in complex documents.
Mixed content — XML can interleave text and elements, essential for document-centric formats.
CDATA sections — Embed raw text with special characters without escaping.
Processing instructions — Carry metadata for processing tools (e.g., stylesheet links).
Comments — Built-in comment support without workarounds.
Schema validation — XSD and DTD provide strict structural validation.

JSON Advantages

Simplicity — Fewer syntax rules make JSON easier to read and write.
Smaller size — No closing tags or verbose syntax means smaller payloads.
Native JS support — JSON is a subset of JavaScript, making it trivial to parse in browsers.
Data types — JSON has native support for numbers, booleans, and null (XML is all text).
Faster parsing — JSON parsers are generally faster than XML parsers.

Our tool bridges the gap by offering XML-to-JSON conversion, so you can work with legacy XML data in modern JSON-based systems. The conversion preserves attributes (prefixed with @), handles repeated elements as arrays, and maintains CDATA content.

Before (minified XML)

After (formatted with 2 spaces)

Frequently Asked Questions