Pre-Grading Suite
Pre-Grade Suite
Upload once, inspect everything. Walk through centering, surface, and corners & edges — then get a predicted overall grade. — Slab Turtle
Scan a card to pre-grade
Shoot the card flat under even light, or upload a scan.
600+ px recommended. One image powers all three tools.
600+ px recommended. One image powers all three tools.
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Centering Estimate
Align frames to calculate
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L/R
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T/B
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Worst
Centering Viewer
Drag handles to align
Controls
Nudge active frame
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Resize active frame
Legend
Blue = outer card edge · Amber = inner print border
Drag corners/edges to adjust · Tap Auto-detect to start
Drag corners/edges to adjust · Tap Auto-detect to start
Inspection mode
Surface Viewer
Original · 100%
Adjustments
Image controls
Brightness0
Contrast0
Sharpen0
Edge strength1.5
Threshold128
Rate surface quality
After inspecting with multiple modes, rate the overall surface condition:
10 = flawless · 9 = near-perfect, faint marks under magnification · 8 = light scratches or print lines visible · 7 = noticeable surface issues · 6 = multiple defects · ≤5 = heavy wear
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Corners & Edges Estimate
Rate each zone to build estimate
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Corners
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Edges
0/8
Rated
Corner & Edge Viewer
Zoom: 100%
Guided Checklist
Progress
Step 1 of 80%
Active region
Top Left Corner
Upload a card to begin.
Navigation
Rate this region
Notes
All zones
Adjust box
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PSA Predicted Grade
Complete all tools to see your predicted grade
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Centering
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Surface
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Corners
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Edges
Grade breakdown
Complete all three tools to generate your predicted grade. PSA's overall grade is heavily influenced by the lowest sub-grade — one weak area can cap your final score.
Actions
Unlock your full report
Get your sub-grade breakdown, grading tips, and early access to Slab Turtle drops. No spam.
Estimates only. Use as a pre-submission screening tool.