SHA Hash Generator
Generate SHA-256, SHA-384, and SHA-512 hashes from any text. Uses the Web Crypto API — all processing in your browser.
🔐 What Is SHA Hashing?
SHA (Secure Hash Algorithm) is a family of cryptographic hash functions designed by the NSA. SHA-256 produces a 256-bit (64 hex character) hash, SHA-384 produces 384 bits, and SHA-512 produces 512 bits. These are one-way functions — you can't reverse a hash to get the original text.
SHA-256 is the most widely used variant, securing Bitcoin mining, TLS certificates, digital signatures, and password storage. This tool uses the browser's native Web Crypto API for secure, high-performance hashing.
🎯 Use Cases
✅ File Integrity
Verify file downloads by comparing SHA-256 checksums against published values.
🔑 Password Hashing
Generate hash values for testing password hashing implementations in development.
⛓️ Blockchain
SHA-256 is the foundation of Bitcoin and many blockchain systems for proof-of-work and transaction verification.
🧪 Development & Testing
Generate test hashes for API authentication, HMAC implementations, and security testing.
❓ Frequently Asked Questions
What is the difference between SHA-256 and MD5?
MD5 produces a 128-bit hash and is considered cryptographically broken — collisions can be generated. SHA-256 produces a 256-bit hash and is considered secure. Use SHA-256 for any security-sensitive application.
Can I reverse a SHA hash?
No. SHA hashes are one-way functions by design. You cannot recover the original input from the hash output. This is what makes them useful for password storage and digital signatures.
Is my data safe?
Yes. All hashing happens in your browser using the native Web Crypto API. Your text is never sent to any server.
Is this tool free?
Yes, 100% free. No account, no ads, no limits.