SHA-256 Generator
Generate secure SHA-256 hashes from text or files.
What is SHA-256?
SHA-256 (Secure Hash Algorithm 256-bit) is a cryptographic hash function that produces a 256-bit (64-character hex) hash. It's part of the SHA-2 family and is widely used in security-critical applications.
SHA-256 example
hello → 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824
Common uses
- Bitcoin and other blockchain mining
- TLS/SSL certificates (via HMAC-SHA256)
- Verifying file downloads
- Password hashing (with salt and a slow KDF like bcrypt/argon2)
- Digital signatures
Privacy
Everything runs in your browser. Nothing is uploaded.
Frequently Asked Questions
What is SHA-256?
SHA-256 is a 256-bit cryptographic hash function from the SHA-2 family. It produces a 64-character hex string and is considered secure.
Is SHA-256 secure?
Yes. SHA-256 is currently unbroken and recommended for security-sensitive uses: password hashing (with salt), digital signatures, and certificates.
What is SHA-256 used for?
Blockchain (Bitcoin uses SHA-256), TLS/SSL certificates, code signing, password verification, and file integrity checks.
Can I reverse SHA-256?
No. SHA-256 is a one-way function. There is no known method to recover the input from the hash except brute-force, which is infeasible for strong inputs.
Is it free?
Yes. Everything runs in your browser.