Security
Hex Password Generator
Generate random hexadecimal strings (0-9, a-f). Ideal for encryption keys, tokens, and API secrets. Configurable length. Free, browser-based, no signup.
About this hex password generator
Hexadecimal strings — characters 0-9 and a-f — are the standard format for encryption keys, authentication tokens, MAC addresses, and many API secrets. Each hex character represents exactly 4 bits, making it easy to calculate key strength: a 32-character hex string is a 128-bit key, 64 characters is 256 bits. This generator produces random hex strings using a cryptographically secure random number generator (Web Crypto API). Common use cases include WEP/WPA keys, AES encryption keys, HMAC secrets, session tokens, and color codes. Note that hex passwords have lower entropy per character (~4 bits) than full alphanumeric passwords (~5.95 bits), so they need to be longer to achieve the same strength. A 32-hex-character password (128 bits) is equivalent in strength to about a 22-character alphanumeric password.
FAQ
Common questions
What is a hexadecimal password used for?
Encryption keys (AES-128, AES-256), authentication tokens, HMAC secrets, WEP/WPA network keys, API secrets, session identifiers, and any system that requires input in hex format.
How long should a hex password be?
It depends on the required bit strength: 32 hex characters = 128 bits (standard encryption), 48 hex characters = 192 bits, 64 hex characters = 256 bits (maximum standard encryption strength).
Is hex the same as Base16?
Yes. Hexadecimal (hex) is Base16 encoding, using digits 0-9 and letters a-f (or A-F). Each character represents 4 bits of data, making it a convenient way to represent binary data in text form.
Should I use uppercase or lowercase hex?
Both are valid and represent the same values. Lowercase (a-f) is more common in modern programming (JavaScript, Python, CSS color codes). Uppercase (A-F) is traditional in networking and hardware contexts.
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