Generate SHA-256, SHA-512, and SHA-1 cryptographic hashes from any text instantly. 100% private — your text never leaves your browser.
Enter any text, password, or data you want to hash into the input field.
SHA-256, SHA-512, and SHA-1 hashes appear immediately as you type.
Click the copy button next to any hash to copy it to your clipboard.
Use SHA-256 for most purposes — it is the industry standard for data integrity and digital signatures. Use SHA-512 for extra security margins. Avoid SHA-1 for security-critical applications — it has been cryptographically broken since 2017.
No. Cryptographic hash functions are one-way by design — it is computationally infeasible to reverse a hash back to the original input. This irreversibility is a core security property.
Never. All hashing is performed by the browser's built-in Web Crypto API. Your input text stays on your device and is never transmitted anywhere.
SHA-256 is used for file integrity verification, SSL/TLS certificates, Bitcoin and blockchain transactions, API request signing, and as a building block in password hashing schemes like PBKDF2.
SHA-1 produces a 40-character (160-bit) hash — now considered weak. SHA-256 produces a 64-character (256-bit) hash — current standard. SHA-512 produces a 128-character (512-bit) hash — stronger but slower to compute.
The file author publishes the expected hash. You generate a hash of the file you downloaded and compare it to the published value. If they match exactly, the file is authentic and unmodified.
No — raw SHA-256 is too fast for password storage and vulnerable to brute-force attacks. Use purpose-built slow hash functions like bcrypt, scrypt, or Argon2, which are specifically designed for password security.