SHA-256 Hash Generator
Generate SHA-256 hashes instantly with the Web Crypto API. Free online SHA-256 hash generator producing 64-character hex digests. 100% client-side, no data leaves your browser.
Frequently Asked Questions
What is SHA-256?
SHA-256 is part of the SHA-2 family designed by the NSA. It produces a 256-bit (64-character hex) hash digest. SHA-256 is the most widely used cryptographic hash function today, securing everything from Bitcoin to TLS certificates.
Is SHA-256 secure?
Yes. SHA-256 has no known practical vulnerabilities. It would take billions of years to find a collision using current computing technology. It is the recommended hash function for most security applications including digital signatures, password hashing (with salt), and blockchain.
How does this tool compute SHA-256?
This tool uses the browser's native Web Crypto API (crypto.subtle.digest with 'SHA-256'). This provides hardware-accelerated hashing that runs entirely client-side. No data is transmitted to any server.
What is SHA-256 used for?
SHA-256 is used for digital signatures, SSL/TLS certificates, Bitcoin mining, password hashing, file integrity verification, and code signing. It is the default hash algorithm in most modern security protocols.