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Free tools, comprehensive guides, and learning resources to help you understand card grading, assess your collection, and make better decisions.
Analyze your cards from every angle. Each tool focuses on a specific aspect of card condition using CGI Vision AI technology.
Measure left/right and top/bottom centering ratios. See exactly how your card compares to PSA, BGS, and SGC centering thresholds.
Upload a card photo and get an instant AI grade prediction for PSA, BGS, and SGC. 92.8% accuracy across 47 inspection points.
Estimate your card market value based on condition and grade. Compare values across PSA, BGS, and raw card markets.
Analyze the condition of all four card edges. Detect chipping, whitening, dents, and wear patterns that affect grading.
Evaluate card surface condition including scratches, print defects, staining, and holographic integrity.
Comprehensive guides covering grading standards, condition analysis, and everything you need to know about getting your cards professionally graded.
Complete guide to the 1-10 grading scale with all 19 grades, the four condition pillars, and PSA vs BGS vs CGC differences.
Deep dive into centering thresholds for PSA, BGS, and CGC. Learn what ratios you need for each grade level.
Special considerations for grading vintage and pre-1990 cards. Modified standards, cardstock differences, and what to expect.
How to read and interpret AI-generated condition reports. What each metric means and how to use the data for buying and selling decisions.
Step-by-step walkthrough of the CGI Vision AI grading process. From photo upload to grade prediction in 60 seconds.
Guide to grading hundreds of cards at once with AI. Pre-screen collections before professional submission and save on fees.
Quick comparison of the three major grading companies to help you choose the right one for your cards.
| Company | Best For |
|---|---|
| PSA | Sports cards, vintage, highest resale value |
| BGS | Modern sports, sub-grades, TCG |
| SGC | Vintage cards, competitive pricing |
Yes. CardGrade.io offers several free tools including the centering calculator, value calculator, edge analyzer, and surface analyzer. The grade predictor includes 3 free grades per month. Paid plans starting at $9.99/month provide additional grades and features.
It depends on your cards. PSA is generally the best for sports cards and vintage due to highest resale premiums. BGS is preferred for modern cards and TCG because of their sub-grades. SGC offers competitive pricing and is well-regarded for vintage cards. CardGrade.io AI helps you predict what grade each company would give before you submit.
CardGrade.io AI achieves 92.8% accuracy compared to actual grades from PSA, BGS, and SGC. The AI was trained on 32,000+ professionally graded cards and analyzes 47 inspection points across four condition pillars (centering, corners, edges, surface).
The centering calculator, value calculator, and informational tools are available without an account. The AI-powered grade predictor requires a free account so we can track your 3 monthly free credits. No credit card is required.
Start with our Grading Standards guide for a complete overview of the 1-10 scale and four condition pillars. Then explore our specialized guides on centering analysis, vintage grading, and condition reports. Our blog also publishes regular articles on grading tips and market trends.