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Al adds spoken narration to make videos accessible for blind and low-vision viewers.
Subly's Al Audio Description feature automațically narrates actions, settings, and on-screen text, syncing narration to your video to meet WCAG 2.2, EAA, and ADA Title Il standards. Make every video accessible in seconds.
Subly’s AI checks your video for accessibility, detects when Audio Description (AD) is needed, generates it automatically, and lets you edit and export the final version.
Make videos accessible for blind and low-vision viewers while meeting global accessibility standards.
Adds narrated descriptions of key visual details, giving blind and low-vision audiences equal access to on-screen information and storytelling.
Meets WCAG 2.2, EAA, and ADA Title II requirements, ensuring every video meets recognised accessibility standards worldwide.
Improves viewer understanding and inclusivity by describing actions, scenes, and emotions that captions or dialogue alone cannot convey.
Deliver studio-quality audio descriptions that meet EAA, ADA Title II, ACA, and AODA requirements and align with WCAG 2.2 AA/AAA standards.
Accurate, natural, and built for enterprise-scale accessibility.
Built to meet WCAG 2.2 AA/AAA, with Audio Description Extended as Standard.
No overlaps or interruptions. Smarter timestamps fit naturally between dialogue and sound effects.
Balanced narration and professional mastering for broadcast-ready, clear, and consistent audio.
Natural-sounding Al voices in 30+ languages, adapted to regional tone and accessibility needs.
Learn how teams use Subly to automate audio description and improve video accessibility at scale.
Make every lesson accessible with captions, transcripts, and audio descriptions that support every learner.
Keep product videos accessible, compliant, and visible across marketplaces, websites, and social platforms.
Reach every audience with accessible campaigns that meet WCAG and regional standards.
Deliver accessible, broadcast-ready videos for every client and channel, faster and at scale.
Subly’s enterprise-grade platform automates audio description across entire video libraries. Process thousands of files faster, more accurately, and up to seven times more affordably than manual production.
Manage large volumes of video and audio content with Subly’s high-performance, reliable infrastructure.
Al-powered processing generates hours of audio descriptions in minutes with unmatched accuracy and speed.
Cut operational costs by up to seven times with Subly's Al automation and batch processing.
The only platform dedicated to WCAG-compliant video and audio accessibility, all in one place.
We've got answers! Browse through our FAQ section to find quick solutions and detailed explanations to some of the most common queries. Whether you're just getting started or need specific guidance, our comprehensive FAQs are here to assist you every step of the way.
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Audio Description (AD) is an additional narration track that explains key visual elements in a video, such as actions, settings, gestures, scene changes, and on-screen text. It plays during natural pauses in dialogue, allowing people who are blind or have low vision to understand what’s happening on screen.
It ensures all users can follow the story or information being presented, even when visuals convey essential meaning that isn’t spoken aloud.
Audio Description can be generated in the same language as the original video.
Supported languages:
English (UK, USA, Australia, Canada), Japanese, Chinese, German, Hindi, French (France, Canada), Korean, Portuguese (Brazil, Portugal), Italian, Spanish (Spain, Mexico), Indonesian, Dutch, Turkish, Filipino, Polish, Swedish, Bulgarian, Romanian, Arabic (Saudi Arabia, UAE), Czech, Greek, Finnish, Croatian, Malay, Slovak, Danish, Tamil, Ukrainian, and Russian.
Subly supports extended Audio Description only.
Extended AD pauses the video to add longer narration when there isn’t enough space between dialogue, ensuring no visual detail is missed. You can edit and adjust these narrations in the Subly Accessibility Editor before exporting.
This format meets WCAG 2.2 Level AA and AAA requirements for pre-recorded video that includes important visual information.
You can export Audio Description from Subly in the following formats:
Full video with Audio Description: .mp4 (includes pauses and AD voice-over)
Audio Description track: .mp3
Audio Description script: .srt, .webvtt, .txt, .docx, .pdf
These options let you publish or share accessible videos easily across players, platforms, and CMS systems.
Audio Description (AD): an additional audio track that narrates important visual detailsbetween dialogue for blind or low-vision users.
Captions/Subtitles: on-screen text showing dialogue and limited sound cues; they do not describe visuals.
Standard Transcript: text of spoken content only; usually lacks visuals, sound effects and speaker names.
Descriptive Transcript (W3 Language): a text-only alternative that includes dialogue, sound effects, speaker names and visual descriptions to make videos fully accessible without audio or visuals.
Audio Description narrations describe key on-screen actions, text, facial expressions, gestures, scene changes, and visual context.
Example:
“Sarah picks up the letter and smiles. Text on screen reads ‘Welcome Home.’ ”
These descriptions are placed between dialogue or during pauses, synchronised with the video. Extended AD allows longer segments when necessary.
Yes, under WCAG 2.1 and 2.2:
Level A (1.2.3): Requires either Audio Description or a descriptive transcript for pre-recorded video.
Level AA (1.2.5): Requires Audio Description for all pre-recorded video content that includes important visuals not conveyed in the audio.
Level AAA (1.2.7): Adds further enhancement for extended descriptions.
In short: Audio Description is mandatory for Level AA compliance, which is the benchmark referenced by most global regulations.
Yes, indirectly. The EAA references EN 301 549, which requires conformance with WCAG 2.1 Level AA for all digital products and services.
This means that any video containing important visual information not present in the audio must include Audio Description (or a descriptive transcript at Level A). For commercial and public-sector organisations in the EU, this requirement became enforceable in June 2025.
Yes. The Americans with Disabilities Act (ADA) and the 2024 DOJ Title II web-accessibility rule adopt WCAG 2.1 Level AA as the standard.
For videos used by public agencies, education providers, and private companies, Audio Description is required when visuals convey key information. Section 508 of the Rehabilitation Act applies the same rule for U.S. federal websites and media.
Providing Audio Description ensures “effective communication”, the ADA’s core accessibility principle, and reduces legal risk for non-compliance. ADA.gov
Audio Description is just one part of Subly’s accessibility platform. With tools like our AI Accessibility Checker, in-browser Editor, Captions, Descriptive Transcripts, and Colour Contrast Checker, you can make every video accessible, scalable, and aligned with WCAG 2.2, EAA, and ADA Title II standardse — all in one place.
Automatically finds every accessibility issue and shows you exactly where to fix it.
Instantly fix accessibility issues with AI, or fine-tune in the editor.
