| Feature | Specification | |---------|----------------| | | Unlimited (limited by RAM/disk) | | Crawling threads | Configurable (default: 5, max: 50) | | JavaScript rendering | Integrated Chromium (headless) | | Compatibility | Windows, macOS, Linux | | Storage backend | SQLite (v19.x default) for large crawls | | Export formats | CSV, XLSX, JSON, SQLite, Google Sheets API |
The evolution of the software, particularly through versions in the late teens (such as the 19.x series), marked a significant shift from a simple site scanner to a sophisticated data processor. One of the most critical features integrated during this era is JavaScript rendering. Modern websites are rarely static HTML; they are dynamic, relying heavily on JavaScript frameworks like React or Angular to load content. Early versions of crawlers often missed this content, creating a blind spot for SEOs. By introducing a JavaScript rendering engine, the tool allows professionals to see exactly how Google interprets a page, ensuring that vital content is actually visible to search engines. This capability bridged the gap between what a user sees and what a bot crawls, solving one of the most pervasive modern SEO headaches. screaming frog seo spider 198