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About this tool
Track caption and transcript coverage across your course by lesson and by runtime, with an estimate of the work left.
A caption coverage tracker reports what share of an online course has captions and transcripts, measured both by lesson count and by runtime, and converts the unfinished media into an hours estimate using a multiple-of-runtime effort figure. Course creators and instructional designers use it because runtime coverage is the number that actually reflects learner experience — ten captioned two-minute intros do not offset one uncaptioned ninety-minute masterclass. It maps progress against WCAG 2.2 Success Criterion 1.2.2 Captions (Prerecorded), a Level A requirement.
Open Course Caption Coverage Tracker on AltFTool — it loads instantly in your browser.
Paste or type the text you're working with.
Choose how it should be transformed or analyzed.
Copy the finished text into your document or post.
Percentages reflect watch time, not just how many rows are ticked.
Remaining media is multiplied by your real captioning pace to give a schedule figure.
Progress is framed against the Level A WCAG criteria that apply to prerecorded video.
Captions for prerecorded video are a Level A requirement under WCAG 2.2 Success Criterion 1.2.2, and many public-sector and education procurement rules reference WCAG directly. Whether that binds your specific course depends on your jurisdiction and who your learners are, so check with a legal or accessibility adviser before making a compliance claim.
Roughly 1.5 to 3 hours if you are correcting automatic speech recognition output, and 5 to 10 hours if you are captioning from scratch by hand. Technical material with jargon, accents or overlapping speakers pushes you toward the upper end of both ranges.
Captions are time-synchronised text displayed over the video; a transcript is the full text as a separate document with no timing. Under WCAG 2.2, captions satisfy SC 1.2.2, while a complete text alternative including relevant visual information is one accepted route to SC 1.2.3.
By runtime, and report lesson count as a secondary figure. Runtime coverage tells you what proportion of the course a learner relying on captions can actually follow, which is why the tracker shows both and treats the runtime figure as the headline.