Web Flashing Auditor

The Web Flashing Auditor provides automated assessment of flashing content on a given URL. It identifies elements with rapid color changes, CSS animations, animated GIFs, and video overlays that could trigger photosensitive seizures. It measures frequency in Hz and highlights elements exceeding the chosen threshold. It outputs a structured risk report suitable for accessibility reviews and compliance documentation.
The tool supports static analysis of the page source and dynamic analysis through headless rendering to capture runtime flashing patterns. It aggregates events, computes maximum and average frequencies, and produces a risk score. It lists the selectors and resources responsible for flashing to enable targeted remediation.
Users include web developers, accessibility engineers, QA teams, and content publishers. The tool provides measurable signals and actionable guidance, improving safety, regulatory alignment, and trust. Unique value lies in domain-specific flashing risk metrics, adherence to established guidance (e.g., photosensitive epilepsy thresholds), and structured remediation recommendations that map to code changes.
Typical use cases include pre-release audits, accessibility remediation cycles, and SEO risk mitigation for pages with flashing content. Outputs are designed for CI integration and reporting, with machine-readable results and human-friendly summaries.