You add captions to YouTube Shorts using the YouTube app's text tools, editing software or automatic captions. Captions improve accessibility and retention.
Use large, readable fonts and keep captions within safe zones.
Burned-in captions give you control over style and placement, while YouTube's automatic captions add accessibility and searchable text. Many creators use both. Highlighting key words in a contrasting colour helps viewers follow fast speech and draws attention to the most important points.
Step-by-step plan
Generate auto-captions or use your editor's caption tool.
Choose a bold, high-contrast font that reads on small screens.
Keep captions in the centre third, away from on-screen buttons.
Highlight one key word per line in a contrasting colour.
Proofread names and numbers before publishing.
Example: adding bold, word-by-word captions to a talking Short raises average viewed from 62% to 81%, because muted viewers can follow along.
Why this works
YouTube Shorts are served in a swipeable feed where the key metric is "viewed vs. swiped away" in YouTube Studio. Shorts can now run up to three minutes, but the feed still rewards videos that stop the thumb instantly and get rewatched. Unlike TikTok, a strong Short can keep pulling views for months, and Shorts viewers can be converted into subscribers when the channel has a clear, repeatable promise and related long-form or Shorts to binge.
Common mistake to avoid
Using small or low-contrast captions. They are unreadable on phones, so silent viewers miss the point and swipe away.
Pro tip
Keep captions in the centre third of the screen. The bottom area is covered by titles and buttons in the Shorts player.
Check it before you post
Don't guess why your video is stuck.
Upload it to VIRAL AI to get your Viral Score, predicted views, and instant hook fixes in 20 seconds. VIRAL checks your first three seconds, pacing, captions and on-screen text against patterns from high-performing YouTube Shorts videos, flags the exact moments viewers are likely to swipe away, and suggests stronger hooks you can film before you post. It is free to start on iPhone, Android and the web, so you can test every idea before it goes live.
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