Creates SHA-1 (40 hex chars) from text — all in your browser
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SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash algorithm from the 1990s that produces a 160-bit hash value (40 hex characters). Specified by the NSA in 1995, it is still used in legacy systems like Git.
For security-critical applications (password storage, signatures), SHA-1 is considered broken — in 2017 the first practical collision ('SHAttered') was demonstrated. For non-security use cases like file checksums or Git commit IDs, it remains useful.