XML Tools
Format, beautify, minify, validate, and compare XML — directly in your browser, no signup, no upload, no install. Beautify messy SOAP responses or config files, catch well-formedness errors with a clear status, shrink XML down for production with minify, and diff two XML documents side-by-side to spot every added, removed, or changed element. Every tool runs entirely on your device, so your data stays private and results appear instantly, even for large documents.
XML Formatter
Beautify or minify XML documents instantly. Format messy XML into readable output.
Open XML FormatterXML Tools - When to use ?
Two focused tools, each built for a specific step in working with XML.
XML Formatter
Beautify or minify XML documents instantly. Format messy XML into readable output.
You have minified or messy XML — a SOAP response, an RSS feed, a config file — and need it readable, or need to shrink it back down before shipping.
- Beautify with 2 or 4-space indentation
- Minify to the smallest possible payload
- Instant well-formedness check
- Upload a .xml file or paste directly
XML Compare
Compare two XML documents side-by-side and highlight the differences.
You're checking a SOAP or REST XML response against an expected shape, or diffing config files like pom.xml or web.xml across environments.
- Side-by-side diff with added/removed highlights
- Deep comparison of nested elements and attributes
- Validates both documents before comparing
- Upload two files or paste both sides
Everything You Need to Work with XML
One consistent toolkit for the XML tasks developers reach for most often — all free, all client-side.
Fast Browser Processing
Every operation runs locally in JavaScript — no round trip to a server.
Data Never Leaves Your Browser
Your XML is processed on-device and never uploaded anywhere.
Format & Beautify XML
Pretty print minified or messy XML with 2 or 4-space indentation.
Minify XML
Strip all whitespace to produce the smallest possible XML payload.
Well-Formedness Check
Catch a missing closing tag or malformed element instantly.
Compare XML
Diff two XML documents and see every addition, removal, and change.
Syntax Highlighting
Read and edit XML in a full Monaco editor, the same one used in VS Code.
Copy Result
Copy formatted, minified, or compared output to your clipboard in one click.
Download Result
Save output as a standalone .xml file for your project or docs.
What is XML?
XML — Extensible Markup Language — is a text-based format for structuring and exchanging data using nested elements, attributes, and text content. Standardized by the W3C in 1998, it predates JSON as the dominant data-interchange format on the web and remains deeply embedded in enterprise systems, SOAP APIs, configuration files, and document formats.
The format is built around tags: every value sits inside an opening and closing element (<price>9.99</price>), and elements can carry attributes (<item id="42">) alongside nested child elements. Unlike JSON, XML has no built-in notion of arrays — repetition is expressed by repeating an element — and it supports comments, namespaces, and a formal schema language (XSD) for describing exactly what a valid document must contain.
That extra structure is why XML is verbose compared to JSON, but it's also why XML is still the format of choice where strict, verifiable contracts matter: SOAP web services, financial messaging, publishing formats like DocBook, and office document formats like .docx and .xlsx, which are themselves ZIP archives of XML files.
Developers reach for XML tooling — formatters, validators, and diff tools — because raw XML from an API or build log is usually minified onto a single line or hand-edited under time pressure, and a single missing closing tag anywhere in a deeply nested document can break parsing. A quick pass through a formatter or comparison tool is a routine part of debugging integrations and reviewing config changes.
Where XML Is Used
XML shows up across enterprise systems, APIs, and document formats.
SOAP APIs
Request and response envelopes for SOAP web services.
RSS & Atom Feeds
Syndication formats for blogs, podcasts, and news.
Configuration Files
pom.xml, web.xml, Android manifests, and build configs.
Enterprise Integration
SAML assertions, legacy systems, and B2B data exchange.
Office Documents
.docx, .xlsx, and .pptx are ZIP archives of XML files.
Sitemaps
sitemap.xml describes a site’s pages to search engines.
Build Tools
Maven, Ant, and other build systems configured in XML.
Data Exchange
EDI, financial messaging (FIX, ISO 20022), and publishing formats.
A Typical XML Workflow
How these tools fit together when you're working with a real SOAP response or config file.
- 1
Receive XML Document
Copy raw XML from a SOAP response, feed, or config file.
- 2
Check & Format XML
Beautify it and confirm it’s well-formed in one step.
- 3
Minify for Production
Strip whitespace back down before shipping or storing.
- 4
Compare Changes
Diff against a previous or expected version.
- 5
Copy / Download
Grab the result for your code, docs, or tests.
Example XML
A few common shapes of XML you can try directly in either of the tools above.
Simple Element
<user>
<id>101</id>
<name>Ada Lovelace</name>
<active>true</active>
</user>Nested Elements with Attributes
<user id="101">
<name>Ada Lovelace</name>
<address>
<city>London</city>
<country>UK</country>
</address>
</user>Repeated Elements (List)
<roles>
<role id="1">admin</role>
<role id="2">editor</role>
<role id="3">viewer</role>
</roles>Why PayloadTools?
Browser Processing
Every tool runs client-side, entirely on your device.
No Server Upload
Your XML is never transmitted to or stored on a server.
Fast
Results appear instantly, even for large documents.
Free Forever
No paywalls, tiers, or usage limits.
Mobile Friendly
Fully usable on phones and tablets, not just desktop.
Unlimited Usage
No account, no rate limits, no watermarks.
Modern UI
A clean, fast interface built for daily developer use.
Frequently Asked Questions
Common questions about XML and about these tools specifically.
Related XML Resources
In-depth guides on XML, coming soon.
XML vs JSON
How the two formats compare for size, readability, and API design.
XML Best Practices
Conventions for naming, nesting, and structuring XML documents.
Common XML Errors
The syntax mistakes that most often break XML parsing.
XML Syntax Guide
A complete reference for well-formed XML grammar and structure.
How to Validate XML
The difference between well-formedness and XSD/DTD schema validation.
XML Namespaces Explained
Why namespaces exist and how to avoid element name collisions.