Online XML Viewer & Hierarchy Inspector
Open, auto-indent, and search XML documents, schemas (.xsd), property lists (.plist), and build configs (.csproj, .pom) 100% locally in your browser.
Drag & drop files here, or click to browse
Open single or multiple files simultaneously in tabs
🔒 Your files stay on your device. We never upload your files to any server.
Inspecting Extensible Markup Language (XML) Files Safely in the Browser
Extensible Markup Language (XML), defined by the W3C XML 1.0 specification, remains critical across enterprise banking (ISO 20022 SEPA/SWIFT messages), healthcare interoperability (HL7 CDA), government tax filings, SOAP web services, Apple property lists (.plist), and software build systems (Maven pom.xml and .NET .csproj). XML represents structured data through nested element tags, attributes, namespaces, and XML Schema Definitions (.xsd).
Many enterprise XML files are generated by automated middleware as a single unbroken line of text spanning tens of thousands of characters. Opening an unformatted XML file directly in a default browser window often fails with a cryptic stylesheet warning or struggles to render large trees, while uploading financial or healthcare XML payloads to third-party web formatters violates strict data confidentiality rules.
FilePeek provides a dedicated, read-only, client-side XML viewer that formats and highlights XML hierarchies right inside your browser memory. Furthermore, because FilePeek renders XML as tokenized read-only source rather than executing external DTDs or XML External Entities (XXE), you can safely inspect untrusted XML documents without any risk of XXE file disclosure or server-side request forgery.
Technical Specifications
Architectural details and file format parameters verified by FilePeek.
| Specification | W3C XML 1.0 / Namespaces in XML / XSD 1.1 |
|---|---|
| Supported Extensions | .xml, .xsd, .xsl, .plist, .csproj, .pom |
| Maximum File Size | 500 MB Local Browser Memory |
| Security Architecture | Immune to XXE (XML External Entity) & XSLT execution |
| Formatting Engine | One-click XML tag indentation & pretty-printing |
| Search & Navigation | Line-numbered syntax highlighting + instant keyword search |
How to Open & View XML Viewer Files
Step-by-step instructions for viewing files without installing desktop software.
Select or Drop Your .XML File
Drag any .xml, .xsd, .xsl, .plist, .csproj, or .pom file onto the dropzone above or click "Browse Files".
Pretty-Print Nested XML Tags
Click "Format / Pretty-Print" in the viewer toolbar to automatically indent compact single-line XML into a clear hierarchical tree.
Search Elements, Attributes & Namespaces
Use the built-in search bar to jump directly to specific tag names, attribute values, or transaction IDs.
Copy Formatted XML or Download
Copy the indented XML markup to your clipboard with one click or inspect encoding and byte size in the File Info panel.
XML Viewer Viewer Features
Modern browser utilities designed for clarity, performance, and privacy.
Automatic XML Pretty-Printing
Expands single-line SOAP envelopes, SEPA bank messages, and Sitemap files into cleanly indented multi-line XML.
Tag, Attribute & Comment Highlighting
Color-codes element tags, attribute names, quoted attribute values, CDATA blocks, and XML comments for rapid scanning.
Complete XXE & XSLT Safety
Never resolves external entities (SYSTEM/PUBLIC DTDs) or executes XSLT scripts, ensuring 100% safe inspection of untrusted files.
Support for XSD, XSL, PLIST, CSPROJ & POM
Recognizes standard XML derivatives including XML Schemas, macOS/iOS property lists, .NET project files, and Maven POMs.
Line Numbers & Word Wrap Toggle
Pinpoint exact line numbers for schema debugging and toggle line wrapping for long text nodes or Base64 blocks.
Instant Clipboard Copy
Copy the formatted or raw XML document in a single click for pasting into your IDE or documentation.
Common Real-World Scenarios
How professionals and casual users rely on FilePeek's local engine daily.
Inspect ISO 20022 payment messages, SOAP payloads, and EDI-XML transmissions locally without exposing financial records.
Review clinical document architecture (CDA) XML files and FHIR XML resources with 100% local HIPAA-friendly privacy.
Quickly read .csproj, pom.xml, AndroidManifest.xml, and Info.plist configuration files in the browser.
XML Viewer Frequently Asked Questions
Answers to common questions regarding XML Viewer rendering and privacy.
Can FilePeek format a single-line minified XML file?
Yes. Clicking the "Pretty-Print" button in the XML viewer toolbar automatically breaks tags onto separate lines with clean hierarchical indentation.
Is FilePeek vulnerable to XXE (XML External Entity) attacks?
No. FilePeek processes XML strictly as tokenized text inside your browser sandbox and never resolves external DTDs, network entities, or XSLT scripts.
Which XML-based file extensions can I open here?
In addition to .xml, FilePeek natively supports .xsd (XML Schema), .xsl (XSLT Stylesheets), .plist (XML Property Lists), .csproj (.NET projects), and .pom (Maven project files).
Are my XML files uploaded to an external server?
Never. All reading, formatting, and syntax highlighting happen 100% locally inside your browser tab.
Can I open SVG files in the XML viewer or Image viewer?
SVG files (.svg) are rendered visually in our sanitized Image Viewer, and you can also inspect their XML structure safely.
Related File Viewers
Explore other zero-installation format viewers available on FilePeek.