Measure centering from photos, log the card's condition, and estimate its gem-grade odds at PSA, TAG, CGC, and Beckett.
Identify your card
Search for the exact card you're grading so the app has an official reference image to compare against. (Requires internet — everything else works offline.)
Front of card
Load a well-lit photo of the card front. It doesn't need to be perfectly straight — you'll straighten it in step 1.
Back of card
Load a photo of the card back (optional but recommended — PSA requires 75/25 or better back centering for a 10).
Step 1 — Straighten: when a photo loads, drag the 4 dots onto the card's corners and click "Straighten photo" —
the app re-projects the image to a perfect straight-on view (a crooked or angled photo is fine).
Step 2 — Measure: solid cyan lines = outer card edges, dashed orange = inner border (artwork frame edge).
Drag each line onto its edge. Scroll to zoom, drag empty space to pan, double-click to reset view.
Gem grades need roughly 55/45–60/40 front and 75/25 back at PSA/CGC/TAG; Beckett wants 55/45 or better for a 9.5.
Automatic defect scan
Tuned for precision: it only reports defects it's highly confident about, and its markers are
reference-only — they never affect the grade until you verify them by eye and press ✓ Confirm.
Three engines, best available used automatically: AI vision (with an API key — understands foil patterns
like Master Ball), official-image comparison, and basic pixel scan. Your own markers are what the grade is built on.
Please note: automated scanning is not perfect and performs best on photos taken under even, diffuse lighting —
shadows and reflections can produce false positives. Treat these results as a reference, and verify the card yourself
under good light for the most accurate assessment.
For the best scan: photograph out of the sleeve, fill the frame with the card, use the highest camera
resolution, indirect daylight or two lights at 45°, and hold the phone parallel to the card. The AI inspects your
corners at full zoom — sharper photos directly mean better grading.
Mark defects on your photos: click anywhere on the card below to drop a numbered marker, then choose what you see
(corner wear, scratch, stain…) and how severe it is. Scan results appear here too as auto-markers — delete any you disagree with.
Tip: inspect under bright angled light with a loupe; tilt the card so light rakes across the surface to reveal
hairlines and holo damage that look invisible head-on.
Front
Load & straighten the front photo on the Centering tab first.
Back
Load & straighten the back photo on the Centering tab first.
Card-wide condition
Marked defects
Estimated probability of a gem grade, by company
Category breakdown
What's holding it back
Market value at the predicted grade
This tool estimates odds using each company's published grading standards (PSA, TAG, CGC, Beckett), but grading involves
judgment, lighting, and magnification you may not replicate at home — and TAG's computer-vision system catches flaws the
human eye misses. Self-assessments tend to be optimistic — treat the output as a guide, not a guarantee.
Not affiliated with PSA, TAG, CGC, or Beckett.