XML Formatter & Validator Online – Beautify, Minify & Convert XML
Format, validate, and convert XML instantly. Pretty-print XML with proper indentation and syntax highlighting.
Taming the Complexity of Nested Data
XML (eXtensible Markup Language) is the backbone of enterprise data exchange, but its strict hierarchical nature makes it notoriously difficult to read or edit manually. Unlike flatter formats, XML relies on a rigorous structure of nested tags, attributes, and namespaces. A single missing closing tag or an unescaped character can break an entire integration pipeline.
When you're dealing with massive SOAP responses, complex Maven configurations, or an industry-standard ONIX feed, "pretty printing" isn't just about aesthetics—it's about verifying structural integrity. This tool bridges the gap between machine-readable density and human-readable logic.
Valid vs. Well-Formed: Understanding Standards
Single Root Element
Every verified XML document must have exactly one root parent tag that encloses everything else. Multiple root nodes are strictly forbidden.
Proper Nesting
Tags must be closed in the exact reverse order they were opened. Overlapping tags (e.g., <b><i>...</b></i>) breaks the tree structure.
Attribute Quoting
All attribute values must be strictly enclosed in single or double quotes. Unquoted attributes are a common cause of parsing errors in strict systems.
Namespace Scoping
XML Namespaces (xmlns) allow detailed vocabularies to coexist. Our tool visualizes these scopes clearly so you can debug complex SOAP/WSDL envelopes.
Technical FAQ
Core Capabilities
Syntax Highlighting
Color-coded tags, attributes, and values help you distinguish structure at a glance. Identify hierarchy instantly.
Smart Error Detection
We don't just say "Error". We pinpoint the specific line and explain why—whether it's a mismatched tag or unclosed attribute.
Tree Visualization
Navigate complex datasets easily. The visual indentation creates a clear map of your data nodes.
Format Conversion
One-click transforms your XML ecosystem into JSON or YAML for modern JavaScript applications or DevOps configs.
Payload Minification
Compress XML by removing whitespace for efficient storage or bandwidth usage without breaking structure.
Search & Filter
Instantly locate specific tags, attributes, or values even in massive XML datasets with our lightning-fast search.
XSD Compliance
Our formatter ensures your output adheres to "Well-Formed" rules, making it ready for strict XSD schema validation.
Secure Processing
All processing happens locally. Your sensitive configuration data never leaves your browser.
Enterprise Use Cases
Financial Services
Parsing strict ISO 20022 payment messages and banking gateway responses where precision is critical.
Healthcare Interoperability
Debugging complex HL7 and FHIR interchange messages for medical record systems.
Publishing & Feeds
Managing ONIX feeds for book metadata, RSS/Atom syndication, and Podcast directories.
Java Ecosystem
Editing Maven pom.xml, Spring configurations, and web.xml deployment descriptors.
Sitemaps & SEO
Validating sitemap.xml files before submission to Google Search Console to ensure indexing.
Telecom Systems
Managing network configuration files, 3GPP standards, and SIM card profiles that rely on strict XML structures.
Log Analytics
Parsing and beautifying massive XML log files from enterprise servers to identify system failures or behavioral patterns.
Supply Chain & E-commerce
Validating and debugging cXML and OAGIS business documents for automated procurement, B2B EDI exchanges, and inventory sync.
Validation Workflow
Paste Raw Snippet
Drop your XML, minified blob, or even broken code into the smart editor.
Instant Formatting
The editor applies proper indentation and syntax highlighting in real-time as you type.
Pinpoint Errors
Use the red line highlights to instantly locate and fix syntax or nesting issues.
Verify Hierarchy
Review the indented tree to ensure all parent-child nodes and namespaces are correct.
Smart Conversion
Transform your XML to JSON or YAML for use in modern web apps or CI/CD pipelines.
Export Result
Copy the cleaned code or download the formatted .xml file for local deployment.