SHA1 hash calculator

What is SHA1 hash?

The SHA-1 hash is a cryptographic function that transforms input data into a fixed 160-bit (20-byte) hash value, represented as a 40-character hexadecimal string. It is designed to ensure data integrity by producing a unique hash for each unique input, making it useful for verifying that data has not been altered. Despite its historical use in security applications, SHA-1 is now considered cryptographically weak due to vulnerabilities that allow for collision attacks, where two different inputs produce the same hash. As a result, it is recommended to use more secure algorithms like SHA-256 for critical applications.