Safe zone before burn-in: preview the 9:16 frame
Platform UI covers the bottom of Shorts and Reels. Preview captions inside the safe zone before you burn them into the video.
12 November 2026
Answer: Open Preview, load your cues, and keep text inside the marked safe area. Then export SRT or adjust placement in your editor.
Tool: Shorts caption preview — free, runs in this browser.
Burn-in is hard to undo. If a username chip or progress bar covers the last line, you re-export the whole clip.
This preview is a planning frame, not a publisher. It shows whether your lines fit a tall phone layout so you can move or shorten them while the SRT is still editable.
Pair it with the speed checker: a line can sit in the safe zone and still be unreadable if it disappears in half a second.