Paste any text to generate its SHA-1 hash. Note: SHA-1 is considered cryptographically weak — use SHA-256 or SHA-512 for any security-sensitive purpose.
ALGORITHM
DISPLAY
Output length
40 hex characters
Hashing uses the browser's built-in SubtleCrypto API, which implements SHA-1 natively. The hash updates as you type.
The text you enter is never sent to a server. All hashing happens inside your browser tab.
Not for security-sensitive uses. SHA-1 has known weaknesses and collision vulnerabilities. It is still used in legacy systems and for non-security checksums, but SHA-256 is the recommended replacement.
No. Hashing uses the browser's built-in SubtleCrypto API and runs entirely on your machine.