The SHA-1 Hash Generator converts text into a 160-bit SHA-1 hash — a 40-character hexadecimal string. It uses the browser's native Web Crypto API and is useful for reproducing legacy checksums, Git object IDs and integrity values from older systems.
What is SHA-1?
SHA-1 (Secure Hash Algorithm 1) produces a 160-bit hash, shown as 40 hexadecimal characters. It was once the standard for digital signatures and certificates and is still used internally by systems such as Git to identify objects.
SHA-1 is now considered cryptographically broken — practical collision attacks exist — so it must not be used for new security work. Use it only for compatibility with existing systems, and choose SHA-256 for anything security-related.
Typical uses
- Reproduce or verify SHA-1 checksums from legacy software and APIs
- Inspect Git-style content hashes
- Compare integrity values when migrating off SHA-1
Runs locally
The hash is computed in your browser with the Web Crypto API. Your input never leaves the page.
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