Free Online Security Tools
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Security
1–12 / 18Hash digest toolkit
Compute SHA-1, SHA-256, SHA-384 or SHA-512 locally.
HMAC-SHA256 generator
Compute a keyed SHA-256 authenticator using a local UTF-8 key.
JWT payload inspector
Decode JWT header and payload; signatures are not verified.
Password pattern audit
Report local length and obvious patterns; no breach database is queried.
Luhn checksum checker
Validate a numeric identifier checksum without identifying an account.
IBAN checksum checker
Check formatting, known country length and mod-97 checksum only.
ISBN-10 and ISBN-13 checker
Validate book identifiers and convert valid ISBN-10 to ISBN-13.
GTIN barcode checksum
Check GTIN-8, UPC-A, EAN-13 or GTIN-14 check digits.
IPv4 subnet calculator
Compute network, broadcast, netmask and usable range.
IPv6 address normalizer
Expand and compress hexadecimal IPv6 addresses.
IPv4 CIDR membership
Check whether an IPv4 address is inside a CIDR range.
MAC address normalizer
Normalize a 48-bit MAC address and inspect group/local bits.
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