Recognized W3C WAI Evaluation Tool

Ensure safety & accessibility

Video Flash Analysis

Scan video flashes to meet accessibility standards and protect viewers with PSE and other sensitivities.

100% private. Video never leaves your browser.

Drop files to attach (MP4, MOV, WEBM)

Note: Processing runs in your browser. For best results, use a high-performance device.

How it works

Upload your video

Select or drag & drop a video into the upload box. Available formats: MP4, MOV, WEBM

Start the analysis

Review the video metadata and configure your analysis settings::
  • Standard: Choose between WCAG 2.2 and ISO/DIS 9241-11 definitions.
  • Reduce Motion Noise: Decreases false positives from fast-moving objects.

Processing video

Analysis runs in your browser, so please keep this tab open. Processing time is based on your computer’s speed and mode selected.

Interpreting results

Charts display luminance and red-ratio changes over time. Warning boxes highlight actual violations: flashes occurring at more than 3 per second and exceed WCAG thresholds.

FAQ

Answers to common questions about photosensitive epilepsy, WCAG 2.3.1 compliance, and using Video Audit.

Anyone producing or testing video or animated content should care. This includes video creators, editors, web and game developers, and accessibility specialists. For example, web developers can use it to test animated banners or game scenes, and video producers can check their film or ads for safety. WCAG explicitly notes that all content on a webpage must meet seizure-safety criteria w3.org. Our video analysis tool serves the same audience: if your website or video might have flashing content, it’s wise to check it.

Product roadmap

Features roadmap
FeatureDescriptionDelivery
BlogLaunch a blog featuring guides and best practices focused on video accessibility.Q2 2026
PDF Audit ReportsGenerate professional PDF audit reports for shareable compliance.Q2 2026
Shareable LinksGenerate shareable URLs for completed analysis without sending heavy files.Q2 2026
Enterprise APIProvide a headless API wrapper for enterprise CI/CD deployment pipelines.Q3 2026
AI Context FilteringIntegrate AI models to classify strobe sources and drastically reduce false positives.Late 2026