XML Stream Parser

About

Your XML file is too large to open? Not anymore.

XML Stream Parser handles XML files up to 2 GB directly in your browser — no desktop software, no uploads to third-party servers, no frozen tabs. It uses streaming SAX parsing in a Web Worker, so your browser stays responsive while processing even the biggest files.

★ Why XML Stream Parser?
Other XML viewers crash or freeze on files over 50 MB. XML Stream Parser was built specifically for large and very large XML files — hotel reservation dumps, API logs, data exports, SOAP responses, configuration files, and anything else that comes in XML.

Stream-parse files up to 2 GB without loading them into memory
Uses only ~20 MB of RAM regardless of file size
Real-time progress bar with speed (MB/s) and ETA
Works 100% locally — your data never leaves your browser

★ Powerful Search
Find what you need in millions of elements:

Search by tag name (e.g., find all <RoomStay> elements)
Search by attribute name (e.g., find elements with "ID" attribute)
Search by attribute value (e.g., find elements where any attribute = "EUR")
Search by text content (e.g., find elements containing "error")
Combine filters for precise results

★ Element Explorer
All elements listed by nesting depth — see the full document structure at a glance
Click any element to preview its actual XML code with syntax highlighting
Browse through samples with ◀ ▶ navigation
Up to 50 samples captured per tag during parsing

★ Built-in XML Guide
New to XML? The extension automatically picks a real element from your file and shows an interactive color-coded breakdown: what's a tag, what's an attribute name, what's a value. Hover over any part for a tooltip.

★ 5 Languages
Full interface available in English, Русский, Deutsch, Español, and Français. Auto-detected from your browser language.

★ Privacy & Security
All processing happens locally in your browser
No data is sent anywhere
No analytics, no tracking
Minimal permissions (storage only, for saving your language preference)

★ Technical Details
Streaming SAX parser — reads file in 8-16 MB chunks via File.slice()
TextDecoder with stream:true for correct UTF-8 handling across chunk boundaries
Web Worker keeps the UI thread free
Reconstructs XML samples from SAX events for code preview
No DOM tree built — constant memory usage

★ Perfect for
Developers debugging large API responses or SOAP messages
QA engineers inspecting test data exports
Data analysts exploring XML data dumps
DevOps working with large configuration files
Anyone who's ever seen "file too large to open"