Security
Hash Generator
Compute MD5, SHA-1, or SHA-256 hashes of any text.
Security
Credit Card Validator
Check whether a credit card number passes the Luhn checksum, detect the card brand (Visa, Mastercard, Amex, Discover, JCB, Diners, UnionPay, Maestro), and see the expected check digit for any partial number.
Ringkasan alat
Alat ini menerima input berstruktur dan mengembalikan output deterministik dalam pelayar tanpa muat naik pelayan.
- Nama alat
- Credit Card Validator
- Niat input
- Sediakan kandungan sumber untuk diubah, disahkan atau dianalisis.
- Niat output
- Terima output ternormal yang sesuai untuk disalin, digunakan semula atau dinyahpepijat.
- Contoh input
- 4111 1111 1111 1111
- Contoh output
- Valid Visa test number (passes Luhn).
Valid Visa card number (passes Luhn check).
Digits16
BrandVisa
Formatted4111 1111 1111 1111
Expected check digit0
This tool runs entirely in your browser. Numbers are never sent anywhere.
About the Luhn algorithm
The Luhn algorithm (ISO/IEC 7812-1) is a checksum used by credit cards, IMEI numbers, and some national IDs. Passing the check means the number is internally consistent — it does not mean the card has been issued, is active, or has funds available.
Pengenalan alat
Check whether a credit card number passes the Luhn checksum, detect the card brand (Visa, Mastercard, Amex, Discover, JCB, Diners, UnionPay, Maestro), and see the expected check digit for any partial number.
Gambaran keseluruhan alat
The Luhn algorithm is the same checksum used by banks, IMEI numbers, and some national IDs. Passing the check means the digits are internally consistent — it does not mean the card has been issued, is active, or has funds. This tool runs entirely in your browser so numbers never leave your device. Use it for test data, QA, and to build intuition about how card numbers are structured.
Kes penggunaan
- Use Credit Card Validator when you need fast validate credit card numbers with the luhn algorithm, detect the card brand, and compute the expected check digit — 100% client-side.
- Handle security workflows directly in the browser with no install required.
- Support SEO long-tail intent by covering quick checks, troubleshooting, and one-off conversions.
Contoh input/output
Niat input
4111 1111 1111 1111
Niat output
Valid Visa test number (passes Luhn).
Niat input
5500 0000 0000 0004
Niat output
Valid Mastercard test number (passes Luhn).
Soalan lazim
Does this check whether the card is real?+
No. It only verifies the structural checksum. Real validation requires a payment gateway.
What brand lookup is used?+
A static table of Issuer Identification Number (IIN) prefixes and valid lengths for Visa, Mastercard, Amex, Discover, JCB, Diners, UnionPay, and Maestro.
Is my card number sent anywhere?+
No. Everything runs entirely client-side. Still, avoid pasting real cards on any site.
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