SHA-1 Hash Generator
Generate SHA-1 hashes from any text or file directly in your browser. SHA-1 produces a 160-bit (40-character hex) digest. While deprecated for certificates and signatures, SHA-1 is still used in Git, legacy systems, and non-security checksums.
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Frequently Asked Questions
›Is SHA-1 still secure?
SHA-1 is considered cryptographically weak — practical collision attacks exist. It should not be used for digital signatures or certificates. It remains in use in Git for commit hashing and in some legacy checksum systems.
›How long is a SHA-1 hash?
A SHA-1 hash is always 160 bits, which is 40 hexadecimal characters or 28 Base64 characters.
›Does this run in my browser?
Yes. SHA-1 hashing uses the Web Crypto API built into your browser. No data is uploaded or transmitted.