SHA-1 produces a 160-bit (40 hex character) hash. While SHA-1 is deprecated for security use due to known vulnerabilities, it is still commonly used for checksums and version control (Git). This tool uses the browser's Web Crypto API - your data never leaves your device.
SHA-1 Hash Generator is a specialized cryptographic tool for creating 160-bit message digests from any input text. This SHA1 calculator uses the industry-standard Secure Hash Algorithm 1, as defined in FIPS 180-4, to produce a unique 40-character hex string. While deprecated for security-sensitive applications like digital signatures, it remains a vital hash calculator for legacy systems, git version control, and non-adversarial integrity checks.
For password storage or digital signatures: no. SHOWN collision attacks (Google's SHAttered, 2017) made it unsafe for security-critical use. It's still fine for non-adversarial integrity checks like git object IDs.
Git uses SHA-1 for content addressing, not for security - collisions there cause file mix-ups, not security breaches. The git project is migrating to SHA-256, and recent versions accept either.
No - SHA-1 is deterministic. The same input bytes always produce the same 160-bit digest. If you get different outputs from different tools for the "same" text, one is using a different character encoding (UTF-8 vs UTF-16, with or without BOM).
As UTF-8. The string is fed through TextEncoder before being passed to crypto.subtle.digest, so "café" is hashed as the 5 bytes 63 61 66 c3 a9, not as 4 UTF-16 code units.
Whether you're managing git objects or performing data integrity checks, this SHA-1 Hash Generator provides the fastest and most secure way to compute your SHA1 calculator results.