System Requirements

System & Hardware Recommendations (Windows)

To ensure a stable and efficient scanning experience, please review the following hardware and network recommendations. The Accessibility Scanner is a powerful tool that leverages a full browser engine, and its performance is directly related to the capability of the machine it runs on. Like a T-800, it’ll adapt to almost anything, but better hardware always helps.

Internet Connection

A stable internet connection is essential to prevent scan failures due to network timeouts.

• Minimum: A stable broadband connection with at least 25 Mbps download speed. Slower or high-latency connections will significantly increase scan times and may require you to increase the "Navigation Timeout" setting.
• Recommended: A reliable connection with 50+ Mbps download speed. This will provide a much smoother and faster experience, especially when crawling many pages or scanning resource-heavy websites.

Note: Upload speed is not a critical factor for this application.

Computer Specifications

Your computer's CPU and, most importantly, its RAM will be the primary factors determining scan speed and stability, especially when using advanced features.

Scenario 1: Standard & Sequential Scanning

This applies if you are primarily scanning single pages, small lists of URLs, or using Crawl Mode with parallel features disabled.

• CPU:
  • Minimum: Modern Dual-Core processor (e.g., 10th Gen Intel Core i3, AMD Ryzen 3 3000 series, or equivalent).
  • Recommended: Modern Quad-Core processor (e.g., 10th Gen Intel Core i5, AMD Ryzen 5 3000 series, or equivalent) for a significantly more responsive experience.
• RAM:
  • Minimum: 8 GB. This is the absolute bare minimum. Expect potential system slowdowns on large sites, and consider disabling screenshots for better stability.
  • Recommended: 16 GB. This is the ideal amount for smooth, reliable sequential scanning of most websites, even with "Per Issue Type" screenshots enabled.

Scenario 2: Advanced & Parallel Scanning

This applies if you plan to use Enable Parallel Crawling or Enable Parallel Axe Scanning with a concurrency of 2 or more.

• CPU:
  • Minimum: Modern Quad-Core processor (e.g., 10th Gen Intel Core i5, AMD Ryzen 5 3000 series). This is required to handle a few parallel browser instances without overwhelming the system.
  • Recommended: Modern 6-core or 8-core+ processor (e.g., 10th Gen Intel Core i7 / i9, AMD Ryzen 7 / 9 series). This is strongly recommended for using concurrency settings of 4 or higher, as each worker runs a resource-intensive browser process.
• RAM:
  • Minimum: 16 GB. This can handle low concurrency (2-3 workers) on simpler sites, but you should use the "Per Issue Type" screenshot mode to conserve memory.
  • Recommended: 32 GB or more. This is strongly recommended for a stable parallel scanning experience. It provides the necessary headroom to run multiple browser instances simultaneously, especially when scanning complex JavaScript-heavy applications or when using the memory-intensive "Per Instance" screenshot mode.

Scenario 3: Professional & Deep Interaction Scanning

This applies if you enable the new Interaction Scanning (Deep Scan) feature, especially in combination with parallel modes.

• CPU:
  • Minimum: Modern 6-core processor (e.g., 10th Gen Intel Core i5 / i7, AMD Ryzen 5 5000 series). This feature performs multiple, intensive re-scans on a single page, creating a sustained CPU load.
  • Recommended: Modern 8-core+ processor (e.g., Intel Core i7 / i9, AMD Ryzen 7 / 9 series) to ensure the UI and system remain responsive during these deep analysis tasks.
• RAM:
  • Minimum: 16 GB. This may be sufficient for running Interaction Scanning on a single page or a very small, targeted scan. Performance may degrade.
  • Recommended: 32 GB or more. This is strongly recommended for any serious use of Interaction Scanning. The feature keeps pages in memory for longer and repeatedly analyzes a potentially growing DOM, which significantly increases memory pressure. Combining Interaction Scanning with Parallel Scanning on less than 32 GB of RAM is not advised.

Operating System

• Required: Windows 10 or Windows 11 (64-bit version is mandatory). The application is not compatible with older versions of Windows or 32-bit systems.

Note: The application is a self-contained executable (.exe) and does not require you to install Node.js or any other dependencies manually.

General Recommendations for Optimal Performance

• Close Other Applications: For large or parallel scans, close other resource-heavy applications (like video editors, virtual machines, or even many browser tabs) to free up CPU and RAM for the scanner.
• Start Simple: When troubleshooting an unstable scan, your first step should always be to disable all advanced features (Parallel Crawling, Parallel Scanning, and Interaction Scanning) to establish a stable baseline.
• Use Interaction Scanning Strategically: This powerful feature significantly increases scan time and resource usage. It's best used on targeted User Journeys or a small number of specific URLs rather than a full site crawl. Test it on a single page first to understand its performance impact.
• Use the Right Screenshot Mode: For any large-scale scan (over a few hundred pages), it is highly advisable to use the "Per Issue Type (Lower Memory)" screenshot mode to prevent memory exhaustion.