Fibonacci ToolBox

HMAC generator

Sign a message with HMAC (SHA-256, SHA-512…), as hex and Base64 — handy for webhook signatures.

HMAC generator options
Runs in the background · stops after 60s
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Hash & checksum

MD5, SHA-1/2/3, BLAKE2 and CRC32 of text or files, with checksum verification.

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Password generator

Cryptographically random passwords, diceware-style passphrases and PINs, with entropy.

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UUID / ULID generator

UUID v4, time-ordered UUID v7, ULID, Nano ID, hex tokens and name-based UUID v5.

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QR code generator

QR codes for links, text, Wi-Fi, email, phone and contact cards — as PNG and SVG.

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