Hash Generator
Instantly generate SHA256, MD5, and other hashes from text or files. Secure local calculation using Web Crypto API.
Important: Use Case Guidance
This tool is for file integrity and checksums. For secure password storage, use Argon2 or bcrypt with built-in salting on the server-side.
Hash Generator Use Cases
Frequently Asked Questions
Q. Is my data stored on your server?
No, all hash calculations are performed locally in your browser. Your text never leaves your device.
Q. Can I decrypt a hash back to its original text?
No, cryptographic hashes are one-way functions. They are designed to be impossible to reverse.
Q. Is MD5 or SHA-1 safe for passwords?
No, these algorithms are considered weak and vulnerable. Use bcrypt or Argon2 for password storage.
Q. What is a "salt" in hashing?
A salt is random data added to a password before hashing to prevent rainbow table attacks.
Q. Which algorithm is best for general use?
SHA-256 is the current standard for data integrity and general purpose hashing.
Security Status by Algorithm
| Algorithm | Output Length | Security Status | Usage |
|---|---|---|---|
| MD5 | 128-bit | Weak | Checksums Only |
| SHA-1 | 160-bit | Weak | Legacy Support |
| SHA-256 | 256-bit | Secure | Modern Web / SSL |
| SHA-512 | 512-bit | Very Secure | Sensitive Data |
| bcrypt | Variable | Very Secure | Passwords |
| Argon2 | Variable | Most Secure | Passwords (Best) |
| HMAC-SHA256 | 256-bit | Secure | API Auth |
| PBKDF2 | Variable | Secure | Key Derivation |
Why bcrypt/Argon2 for Passwords?
Fast algorithms like SHA-256 are easy to brute-force with GPUs.
Computationally expensive (Key Stretching)
Built-in Salting to prevent Rainbow Tables
Memory-hard (Argon2) against ASIC attacks
✔ Use Argon2id for all new modern applications.
✔ Use bcrypt for robust and widely compatible storage.
" Never store plain SHA-256 hashes for passwords without a proper KDF. "
Key Features
- Real-time generation for multiple hash algorithms
- 100% Local processing via Web Crypto API
- Support for MD5, SHA-1, SHA-256, and SHA-512
- One-click copy for professional development
Professional online hash generator. Generate SHA256, MD5, and SHA1 hashes instantly for secure data integrity and development tasks.