Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes online. Free hash generator — compute cryptographic hashes instantly.
Three steps to get started
Enter your text
Type or paste any text into the input field. The hash updates automatically as you type.
Choose algorithm
Select SHA-1, SHA-256, or SHA-512. Use SHA-256 or SHA-512 for security-sensitive work. Click "Hash All" to see all results at once.
Copy the hash
Click "Copy" next to the hash you need. Use it for checksums, data verification, or any other purpose.
Cryptographic hashing explained
A hash function takes an input (a string, file, or any data) and produces a fixed-size string of characters called a hash, digest, or checksum. Unlike encryption, hashing is a one-way process — you cannot reverse a hash to recover the original input.
This tool uses the browser's built-in Web Crypto API ( crypto.subtle.digest() ) to compute SHA family hashes. Everything runs locally in your browser — no data is sent to any server.
Common use cases for cryptographic hashes:
- File integrity verification: Confirm a downloaded file has not been tampered with
- Password storage: Store hashed passwords in databases (use bcrypt or Argon2 in production, which add salting)
- Digital signatures: Hash the message, then sign the hash
- Data deduplication: Identify identical content by comparing hashes
- Cache keys: Hash request parameters to create cache keys
Algorithm comparison: SHA-1 (160-bit output) is deprecated for security uses but still found in legacy systems. SHA-256 (256-bit) is the current standard and is used in TLS certificates, Bitcoin, and most modern applications. SHA-512 (512-bit) offers a larger digest and can be faster on 64-bit processors for bulk data.
SHA-1 note: SHA-1 remains available for legacy compatibility, but it is considered weak for collision resistance. For new systems, prefer SHA-256 or SHA-512.
All hashes are generated entirely client-side. Your text never leaves your browser, making this tool safe for hashing sensitive or proprietary content.