Don't let the like button
eat your headline.

No. The video plays from your own device inside this page. Nothing is sent to a server, so it works for unreleased work and client files.

The part of a vertical video that the app's buttons, captions and profile name don't cover. On Instagram Reels the bottom third holds the caption, audio and profile, and the right edge holds the like, comment and share buttons. Keep text and faces inside the outlined area.

1080 × 1920 pixels (9:16). Other shapes get cropped or shown with bars. The checker tells you when your video isn't a standard shape.

They're close approximations of each app's current layout. Apps change their interface and it varies by phone, so leave a little extra room, especially at the bottom.

Close, but not the same. TikTok keeps more space clear on the left and a little less at the bottom. If you post the same video everywhere, the All platforms outline is the strictest of them.