SHA-1 Hash Generator Online
Fast, client-side SHA-1 hashing for text and files.
Mode:
Characters: 0
Hash will appear here…HEX
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Base64
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About SHA-1
What is SHA-1?
SHA-1 (Secure Hash Algorithm 1) is a 160-bit cryptographic hash function that produces a 40-character hexadecimal digest.
Outputs
- 160-bit digest (20 bytes)
- HEX (40 chars) or Base64
- Deterministic & one-way
Security Note
SHA-1 is broken for collision resistance and shouldn't be used in new designs. Prefer SHA-256/512.
Common Uses
- Legacy checksums and file verification
- Old APIs/protocols requiring SHA-1
- Educational/demo purposes
Tool Features
Core
- • Text & file hashing
- • Live hashing
- • HEX/Base64 outputs
HMAC Mode
- • UTF-8/HEX key input
- • Random key generator
- • File HMAC support
UX
- • Copy & Download
- • Paste from clipboard
- • Timing-safe verify