XML Stream Parser

Stream-parse XML files up to 2GB using SAX + Web Workers

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"