Approximate, and why
Platforms do not publish official overlay sizes for organic posts, and the interface varies by device and app version. The boxes on this page come from the closest thing each platform does publish: its guidance for vertical video ads, which run in the same feed. Treat the shaded areas as the parts most likely to be covered, not as a pixel rule.
Safe zones on a 1080×1920 frame
| Platform | Top | Bottom | Left | Right | Clear box |
|---|---|---|---|---|---|
| TikTok | 240 px | 660 px | 120 px | 120 px, 300 px from 840 px down | 660×1020 px |
| Instagram Reels | 269 px (14%) | 672 px (35%) | 65 px (6%) | 65 px (6%) | 950×979 px |
| YouTube Shorts | 288 px | 672 px | 48 px | 192 px | 840×960 px |
What to keep inside the clear box
Put on-screen text, captions you burn in, faces, logos and calls to action inside the clear box. Backgrounds and motion can fill the whole frame: the buttons and caption only cover what is underneath them. If you post the same video to all three apps, keep key elements inside the area that is clear on every platform: roughly 120 px from the left, 300 px from the right, 288 px from the top and 672 px from the bottom.
Post it everywhere at once
With PostBoost you can schedule one vertical video to TikTok, Instagram Reels and YouTube Shorts together, and check each post before it goes out.