XML Stream Parser

Is your XML file too large to open? Not anymore.

XML Stream Parser can handle XML files up to 2 GB directly within your browser — no need for desktop software, no uploading to third-party servers, and no frozen tabs. It utilizes streaming SAX parsing in a Web Worker, ensuring your browser remains responsive even while processing the largest files.

★ Why choose XML Stream Parser?
Other XML viewers often crash or freeze when opening files larger than 50 MB. XML Stream Parser has been specifically designed for large and very large XML files — including hotel reservation dumps, API logs, data exports, SOAP responses, configuration files, and anything else formatted in XML.

Stream-parse files up to 2 GB without loading them into memory.
Uses only around 20 MB of RAM regardless of file size.
Features a real-time progress bar displaying speed (MB/s) and estimated time of arrival (ETA).
Functions 100% locally — your data never leaves your browser.

★ Powerful Search
Easily find what you need among millions of elements:

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

★ Element Explorer
View all elements listed by nesting depth — get an overview of the entire document structure at a glance.
Click any element to preview its actual XML code with syntax highlighting.
Navigate through samples using ◀ ▶ controls.
Capture up to 50 samples per tag during parsing.

★ Built-in XML Guide
Are you new to XML? The extension automatically selects a real element from your file and displays an interactive, colour-coded breakdown: what's a tag, what constitutes an attribute name, and what is a value. Hover over any section for a tooltip.

★ 5 Languages
Full interface available in English, Русский, Deutsch, Español, and Français. Automatically detected based on your browser language.

★ Privacy & Security
All processing occurs locally in your browser.
No data is transmitted elsewhere.
No analytics, no tracking.
Minimal permissions required (storage only for saving your language preference).

★ Technical Details
Streaming SAX parser — reads files in 8-16 MB chunks via File.slice().
TextDecoder with stream:true for accurate UTF-8 handling across chunk boundaries.
Web Worker ensures the UI thread remains free.
Reconstructs XML samples from SAX events for code preview.
No DOM tree is built, maintaining 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 extensive configuration files.
Anyone who has ever encountered a "file too large to open" error.