SHA1 Generator
Create a 40-character SHA-1 hash from text locally in your browser.
Text to hash
Type or paste text. The hash updates locally as you edit.
SHA-1 is deprecated for passwords, digital signatures, and new security-sensitive uses. Use SHA-256, SHA-512, or password hashing such as Bcrypt instead.
Your input is hashed locally using browser cryptography and is never uploaded to our server.
Features
SHA1 Generator Features
Create a 40-character SHA-1 hash from text locally in your browser.
Instant SHA-1 output
Generate a 160-bit, 40-character hexadecimal checksum while you type.
Easy hash copying
Copy the generated checksum for a legacy comparison or file-integrity workflow.
Browser-only hashing
Your input is processed on your device and is never sent to our server.
Clear security warning
The page explains why SHA-1 is unsuitable for new password and signature security.
UTF-8 text support
Hash normal text, code snippets, and Unicode characters with browser encoding.
Live updates
The result refreshes whenever you change the input.
Frequently Asked Questions
SHA-1 is a cryptographic hash function that creates a fixed 160-bit digest, usually displayed as 40 hexadecimal characters.
No. SHA-1 is no longer appropriate for passwords or new security-sensitive uses. Use Bcrypt, Argon2, or a modern password-hashing system.
No. A hash is designed to be one-way, although weak or common inputs can sometimes be guessed.
It may still be needed for legacy checksums, older integrations, or comparison with an existing SHA-1 value.
Yes. Every character, including spaces and line breaks, changes the resulting hash.
No. SHA-1 calculation happens entirely in your browser.
