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.
Note: Processing runs locally in your browser. Video data never leaves your device.
Need full broadcast compliance and pattern hazard checks?
Unlock all 5 global standards (including Japan & ITU-R), stripe pattern detection, cloud queues, and certified PDF reports.
How it works
Upload your video
Select or drag & drop a video into the upload box. Available formats: MP4, MOV, WEBM, AVI, MKV, FLV, WMV, M4V, TS, MPG, MPEG, 3GP, OGV
Start the analysis
Review the video metadata and configure your analysis settings::
- Standard Selection: Choose between WCAG 2.2 (Web), Ofcom 2017 (UK Broadcast), Trace24 (Consensus), and NHK/JBA (Japan Broadcast).
- Engine Tuning: Enable sensitivity adjustments, Reduce Motion Noise, or a WCAG 66ms qualifying window.
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
Interactive Timeline maps luminance & red-ratio fluctuations. Scrub the timeline to sync with Frame Previews showing exact highlighted Flash Zone Overlays (color-coded spatial clusters) where safety violations occur. A detailed Violations Log pinpoints precise timecodes, failing standards, and hazard sizes.
Transparent Plans
Choose the plan that fits your work
Start free in your browser, or use cloud processing for full standards, GIF support, and client reports.
In-Browser
Free
Quickly check a clip for flash risks directly on your device.
$0Free forever
✓ Unlimited local checks
Up to ~1 GB (browser memory limit)
Runs right in your browser (your video never leaves your computer)
WCAG 2.2 and Trace24 standards, plus partial Ofcom (flash checks)
Interactive flash chart and frame-by-frame timeline
Violations table with timestamps to review every hazard
No account, signup, or credit card needed
Cloud Processing
Video + GIF
Starter
For creators and video editors who need full standards and PDF reports without keeping a tab open.
$19/ month
⚡ 40 FHD mins / month (or 20 mins in 4K)+ Top-ups available
Up to 2 GB per file
All standards covered: WCAG 2.2, Ofcom (UK), ITU-R, ISO, Trace24, and NHK/JBA (Japan)
Moving pattern checks (stripes, checkerboards) and scene change cuts
Downloadable PDF compliance report for clients or audits
Animated GIF and video format support
40 minutes of HD video a month (or 20 mins in 4K)
Upload videos up to 2 GB per file
Cloud background queue: upload and close your tab while it processes
Extra minute packs available if you need more time
Certification & Fast Lane
Certified Pass ID
Pro
For teams and editors who deliver certified videos to broadcasters, festivals, or clients.
$49/ month
🚀 120 FHD mins / month (or 60 mins in 4K)+ Top-ups available
Up to 4 GB per file
All standards covered with spatial heatmaps: WCAG 2.2, Ofcom, ITU-R, ISO, Trace24, and NHK/JBA
Moving pattern checks (stripes, checkerboards) and scene change cuts
Official Compliance Pass Certificate with shareable verification link
Downloadable PDF compliance report for broadcast and clients
Priority fast-lane queue: your videos process first
Animated GIF and high-bitrate video support
120 minutes of HD video a month (or 60 mins in 4K)
Upload videos up to 4 GB per file
Direct email support and early API access