Calculate the SHA-1 hash of any text
Security Warning
SHA1 is cryptographically broken and unsuitable for security purposes. Use SHA-256 or SHA-512 for password hashing, digital signatures, or security-critical applications. SHA1 is acceptable only for non-security uses like checksums or cache keys.
Learn more about SHA1 vulnerabilities →A SHA-1 hash is 160 bits, shown as 40 hexadecimal characters. Since the 2017 SHAttered collision it is retired for certificates and signatures, but it still appears in older protocols and in Git object IDs. Use it for compatibility and SHA-256 for anything new.
aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434dda39a3ee5e6b4b0d3255bfef95601890afd80709No. Practical collision attacks exist, so SHA-1 must not be used for signatures or certificates. It is acceptable only for non-adversarial checksums and for compatibility.
160 bits, shown as 40 hexadecimal characters.
Linux: sha1sum file.zip. macOS: shasum file.zip. Windows: certutil -hashfile file.zip SHA1.