Cryptography Calculators
MD5, SHA-1, SHA-256, SHA-512 and CRC checksum generators that run in your browser.
A hash function turns any input into a short, fixed-length fingerprint. The same text always gives the same fingerprint, and a tiny change in the text gives a completely different one, which makes hashes useful for checking that a download or a message arrived intact. The tools here compute MD5 (32 hexadecimal characters), SHA-1 (40), SHA-256 (64) and SHA-512 (128), plus the CRC-8, CRC-16 and CRC-32 checksums.
Choose by purpose, not by habit. SHA-256 is the usual choice for integrity checks today, and SHA-512 is its longer sibling. MD5 and SHA-1 are no longer safe where an attacker could be involved, so keep them for matching legacy checksums. A CRC detects accidental errors in stored or transmitted data but is not designed to resist tampering. None of these should be used on its own to store passwords.
Popular cryptography calculators
- SHA-256 GeneratorA 64-character digest, the usual choice for integrity checks.
- SHA-512 GeneratorThe longer 128-character digest from the same family.
- MD5 GeneratorA 32-character digest, for matching legacy checksums only.
- CRC CalculatorCRC-8, CRC-16 and CRC-32 checksums for catching accidental errors.
All cryptography calculators
- CRC CalculatorPick CRC-8, CRC-16 or CRC-32, enter some text, and get its checksum in hexadecimal. The guide explains how a CRC is calculated and which variants this calculator uses.
- MD5 GeneratorEnter any text and the tool returns its MD5 digest, a 32-character hexadecimal fingerprint. The guide explains what the value is good for and where MD5 should no longer be used.
- SHA-256 GeneratorPaste or type some text and the tool returns its SHA-256 digest, a 64-character hexadecimal fingerprint. The guide covers how to read it, how to check files, and what SHA-256 is trusted for.
- SHA-512 GeneratorType or paste text and the tool returns its SHA-512 digest, a 128-character hexadecimal checksum. The guide explains how SHA-512 differs from SHA-256 and where the longer hash is worth using.
- SHA1 GeneratorEnter any text and the tool returns its SHA-1 digest: a 40-character hexadecimal fingerprint. The guide explains what that value means and why SHA-1 is now a legacy choice.