SHA-1 Hash Generator
Generate the SHA-1 hash of any text instantly using the Web Crypto API. Free online SHA-1 hash generator.
Free SHA-1 Hash Generator
Generate the SHA-1 hash of any text instantly using your browser's built-in Web Crypto API. SHA-1 produces a fixed 160-bit (40 hex character) digest and remains widely used for legacy checksums, Git object IDs, and other non-security-critical fingerprinting, even though it's no longer considered secure against determined attackers.
How to Use It
Type or paste any text into the input box — the SHA-1 hash is computed live as you type usingcrypto.subtle.digest. Click Copy to grab the resulting hex digest.
Example
Hashing the text hello producesaaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d.
Common Use Cases
- Verifying file integrity against a published SHA-1 checksum.
- Understanding how Git computes its commit and object hashes.
- Generating deterministic identifiers for legacy systems that expect SHA-1.
FAQs
Is SHA-1 secure for passwords?
No — like MD5, SHA-1 is fast to compute and has known collision attacks, which makes plain SHA-1 a poor fit for password storage. Real systems should use a slow, salted algorithm such as bcrypt or Argon2 instead.
Is my text uploaded anywhere?
No — hashing happens entirely client-side using the browser's native Web Crypto API. Nothing you type is sent to a server.
How is SHA-1 different from SHA-256?
SHA-1 produces a shorter 160-bit digest and has publicly demonstrated collision attacks, while SHA-256 produces a longer 256-bit digest with no known practical attacks — which is why SHA-256 is generally preferred for anything security-sensitive today.