Slab Check

Measure your card's centering the way PSA does, even from a crooked photo. Drag the dots to the corners and the app flattens the angle for you. Advanced tools: rotate, grid overlay, edge dragging, and AI corner detection.

Choose photo

Drag the teal dots onto the four outer corners of the card.
Drag the orange dots onto the corners where the border meets the picture.

Tap a dot to select it

Rotation

0°

Drag Mode

AI Assistant

Drag a dot near where it goes, tap it, then use the arrows to fine-tune. Lock the dots when you're done so they can't move. Tilted photos are fine.

Card valuation

Card Set (e.g., 1996 Upper Deck)

Card Number

Card Name / Player

Print Type

PSA centering limits

Max grade	Front	Back

Each side is judged on its worse direction, left/right or top/bottom. If the front has no border, like a full-art insert, measure the back.