Free browser tool
Free caption safe-zone checker for TikTok, Reels, and Shorts
Upload a local frame or clip, move the sample caption, and check whether your text collides with common vertical feed interface zones.
Safe-zone checker
Preview caption placement for vertical feeds
Upload a local frame or clip and test caption position against common TikTok, Reels, and Shorts interface zones.
Red areas mark common UI collision zones. Keep important text in the clear center band.
No upload happens here. The file stays in the browser tab.
Check caption placement before export
Vertical platforms place buttons, captions, usernames, and descriptions over the video. This safe-zone checker helps you keep important text in the readable center area.
Free tool FAQ
What is a caption safe zone?
A safe zone is the part of the video that usually stays clear of platform interface elements like buttons, descriptions, and top navigation.
Does this tool render my video?
No. It only previews placement in your browser. Use CapzAi export when you want captions burned into the final MP4.