Card Number Finder (PCI Scan)
Scan text, logs or exports for card numbers (Luhn-valid) and list where they appear.
Tool inputs stay in your browser · optional AI search sends your query
Good to know: A quick check before sharing a file or log. Results are masked. Runs locally.
How to use it (step by step)
- 1Type or paste your text into the “Text to scan” box. There is already an example in it so you can see how it works; press Clear to start with your own.
- 2The answer appears right away in the “Findings (masked)” box. No button needed.
- 3Press Copy and paste the result wherever you need it.
Words to know
- Luhn check
- A quick math test every real card number passes, like a spelling check for numbers. Passing it only means the number is typed in the right shape, not that the card is real.
- PCI DSS
- The security rules businesses must follow when handling card numbers. One rule: never show or save the full number.
- Scanned PDF / OCR
- A scanned PDF is a photo of paper, so it has no real text inside. OCR is technology that reads the letters from the picture.
- Array / list
- An ordered collection of items, like ["apple", "banana"]. Every programming language has one.
- Masking
- Hiding most of a number with dots or stars, like •••• 4242, so it cannot be misused.
More in Cards & Payments
Luhn Algorithm Step by StepSee exactly how the Luhn (mod 10) checksum is calculated for any number.Bulk Card Number ValidatorValidate a list of card numbers at once: network, length and Luhn, one per line.Card Brand DetectorIdentify the card network from the first digits: Visa, Mastercard, Amex, JCB, UnionPay and more.BIN / IIN Checker (Offline)Break down the first 6–8 digits of a card: network, industry (MII), lengths and IIN size.MII Lookup (First Card Digit)What the first digit of a card number means: banking, travel, airlines, petroleum…Card Expiry Date ValidatorCheck an MM/YY expiry: valid format, expired or not, and months left.