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.
Is this tool free?
Yes. All KappaKit tools are free, run in your browser, and require no signup or account.