The smarter way to check and fix video and audio accessibility — before you hit publish.
Video is everywhere — onboarding sessions, product updates, marketing campaigns, global announcements, and training libraries. But with every new piece of content, a crucial question arises:
Is this video accessible?
Until now, most teams relied on manual checks, vague guidelines, and third-party audits. But accessibility standards are evolving fast: the ADA is already in effect in the U.S., and starting June 2025, EU member states will enforce the European Accessibility Act (EAA), often referencing the WCAG as the standard.
There was nothing on the market that could help businesses adapt quickly. So we built it!
Introducing Subly's AI Accessibility Checker: a fast, scalable, and automated way to proactively identify and fix accessibility issues in your pre-recorded video and audio content.
Make every video accessible. Instantly. At scale.
If your team creates videos for marketing, training, internal comms, or social media, you know the challenge: how can you ensure every piece of content meets WCAG compliance requirements — without slowing down workflows or relying on guesswork?
And here's the reality: most partners and vendors still review accessibility manually — a process that’s time-consuming, costly, and impossible to scale. Video is everywhere across the organisation, not just in one team. With multiple stakeholders, scattered tools, and constant back-and-forth, teams are left with delays and uncertainty. Until now.
Subly’s AI Video Accessibility Checker automates the hard part. It brings speed, clarity, and confidence to your accessibility workflow.
🚀 Meet the Subly AI Agent + Accessibility Report
Subly’s AI Accessibility Checker is built for pre-recorded video and audio content — the kind your organisation creates every day.
With a single upload, our AI scans your video, flags potential accessibility issues, and generates a detailed report.
This report highlights specific frames that may need attention, aligned with WCAG guidelines—the standard referenced in laws like the ADA, ACA, and EAA Directive.
You'll receive clear, actionable insights to help you understand exactly where you stand—and what to fix. You’ll make your videos EAA compliant in minutes.
And best of all: you’ll see it all in your Subly dashboard — a simple overview showing which videos are accessible and where attention is needed.
✅ What does Subly AI Agent check for?
Subly’s AI Agent currently supports key accessibility standards, with more features on the way:
- Captions – Supports both open and closed captions. Checks for presence, readability, sync, and styling — even if captions are burned into the video.
- Colour contrast – Checks whether captions and overlays are visible against the background.
- Flashing content – Detects strobing or unsafe sequences that breach accessibility thresholds.
- Caption length & speed – Flags captions that are too long or too fast to read comfortably (CPL/CPS).
- On-screen text (coming soon) – Checks whether embedded text meets contrast and size requirements.
- Text clarity(coming soon) – Flags overly complex vocabulary, jargon, and sentence structure to improve understanding.
You’ll receive a shareable report pinpointing specific frames with issues — and you can dive straight into Subly’s Accessibility Editor to fix them immediately.
🧠 Built by experts. Powered by AI.
Subly’s Accessibility Checker is the result of six years of dedicated product development in media accessibility. It was shaped by hundreds of conversations with agencies, broadcasters, and enterprises struggling to stay compliant at scale.
Subly’s Accessibility Checker is the result of six years of product innovation, shaped by hundreds of conversations with accessibility teams, media creators, and global enterprises.
Our team lives and breathes media accessibility. We support every aspect — from captions and transcripts to colour contrast, on-screen text, flashing content, audio description, across languages and formats. We understand the real-world challenges and help teams create inclusive content at scale.
We’re not just another editing platform. Subly is purpose-built for media accessibility, supporting captions, transcripts, colour contrast, flashing content, audio description, and more. We understand the workflows of creative, comms, and accessibility professionals.
Subly fills the gaps left by generic AI tools, helping you scale inclusive content creation while meeting evolving EAA compliance requirements.
🌍 Why accessibility matters more than ever
- 1 in 6 people globally live with a disability (WHO)
- Accessible content drives better engagement, reach, and SEO (Neil Patel)
- Meeting legal standards like the ADA and EAA means aligning with WCAG compliance (W3C)
If your content isn’t accessible, you’re not only risking penalties — you’re excluding audiences who want to engage.
🔍 How Subly compares
There’s no AI accessibility checker like this. Most tools don’t check for accessibility at all — and human review can’t keep up with the pace of content creation.
💡 What makes it different?
Subly is built for enterprise video teams, agencies, and accessibility consultants managing high volumes of content. Our AI accessibility checker helps you:
- Save time and cut costs by eliminating back-and-forth reviews
- Automate repetitive checks
- Scale without bottlenecks
- Shift accessibility from a reactive fix to a proactive process
- Improve the quality and consistency of accessible content
It’s AI built to support your workflow — working alongside your existing tools to reduce errors, support manual checks, and help scale accessibility efforts without disruption. It’s designed to improve consistency and quality, while helping teams address potential accessibility issues more efficiently — all without adding to your workload.
Who it’s for:
- Video, creative, and social media teams publishing fast
- Marketing and internal comms teams creating content organisation-wide
- Customer-facing and L&D teams managing onboarding and training
- Accessibility and DE&I leaders
- Accessibility consultants and agencies
Try Subly’s AI Accessibility Checker today
Subly’s AI Accessibility Checker is now available for business and enterprise customers.
Already using Subly? Head to your dashboard and start scanning.
New here? Let us show you how to make videos accessible in seconds and support your EAA compliance efforts.
👉 Book a demo
👉 Learn more about Subly’s AI Video Accessibility Checker
What would you like to see in the AI Accessibility Checker?
Suggest a feature, and we’ll consider adding it to our product roadmap. It might already be in the works! Sign up for updates, or get in touch to tell us about your specific needs.
The next chapter of Subly’s Product Vision
Subly was founded on a simple but powerful idea: media accessibility should be effortless, scalable, and built into the way modern teams work. We’ve spent years helping organisations simplify transcription, captioning, and localisation — but we’ve always known that’s just the beginning.
Now, with our AI-Powered Video Accessibility Checker, we’re reimagining how accessibility fits into the content lifecycle. We're not just making content accessible — we're automating the time-consuming, manual work that slows teams down. By combining AI with deep accessibility expertise, Subly helps teams audit, check, and fix issues faster, with less friction, across every department and media — video and audio alike.
Our vision is to build the leading platform for media accessibility — one that makes accessibility scalable, affordable, and collaborative. Whether you’re part of a global enterprise, a creative agency, or an accessibility consultant, Subly is here to support your workflow, reduce overhead, and help you move faster — without compromising on quality or standards.
And we’re just getting started.
📄 Frequently Asked Questions
What is a video accessibility checker?
Subly created the first AI-powered video accessibility checker on the market. It detects issues in pre-recorded content and supports EAA compliance, as well as meeting WCAG, ADA, and ACA standards.
Does Subly work for pre-recorded videos?
Yes. Subly is built specifically for pre-recorded video and audio files.
Why is accessibility important for pre-recorded media?
Pre-recorded content is used widely across organisations. Accessibility ensures compliance and broadens reach.
How does Subly compare to manual accessibility checks?
Subly is faster, scalable, and more consistent. Manual reviews are slower, expensive, and hard to scale.
Can Subly check caption quality?
Yes. It reviews accuracy, readability, sync, styling, and contrast.
Can Subly check colour contrast on captions and on-screen text?
Yes. It ensures visibility of all text elements against background visuals.
Does Subly check for flashing content or triggers?
Yes. Subly flags visual sequences that may be unsafe or non-compliant.
Does Subly check against WCAG guidelines?
Yes. WCAG is the global standard for accessibility, and Subly’s AI checks align with it to help meet legal and ethical requirements.
Sources:
Directive - 2019/882 - EN - EUR-Lex
Web Content Accessibility Guidelines (WCAG) 2.1
Can Website Accessibility Affect Your Rankings? - Neil Patel
Understanding WCAG Guidelines for Video Accessibility
Top 8 ADA Accessibility Compliance Checker Tools
Comprehensive Media Compliance Guide for Companies: EAA 2025
