Aspect Ratio & Crop-Safe-Zone Calculator
Pick your source frame and the platform ratio you're cropping to. See the crop box and the classic title-safe / action-safe zones live, with exact pixel offsets — so you know before you reframe whether a face, a caption, or a logo is about to get clipped.
Source frame
Target crop ratio
Safe zones
Exact values
What "safe zone" means here
Action-safe (90% of the frame, a 5% margin on every side) and title-safe (80%, a 10% margin) are the classic SMPTE broadcast conventions for keeping essential action and on-screen text away from overscan clipping. They're still a solid rule of thumb for keeping key text and graphics clear of platform UI (captions, buttons, profile chips) on vertical social video — but every app's UI is different and changes over time, so treat this as a planning guide, not a guarantee, and check the live preview in whatever app you're actually posting to.
Reframing is the easy part. Need the thing filmed and cut for every aspect ratio, not just measured? Trident Social is the studio that built this.
See what the studio builds →