Hash Functions

Generate cryptographic hashes for data integrity verification, password storage, and digital signatures. All computations are performed locally in your browser.

MD5 Generator

Generate 128-bit MD5 hash values. Primarily used for checksums and data integrity verification. Note: Not suitable for password storage due to security vulnerabilities.

SHA-1 Calculator

Generate 160-bit SHA-1 hash values. Widely used in legacy systems and Git version control. Considered cryptographically broken for secure applications.

SHA-256 Generator

Generate 256-bit SHA-256 hash values. Part of the SHA-2 family, widely used in blockchain technology, digital certificates, and secure applications.

SHA-512 Generator

Generate 512-bit SHA-512 hash values. Provides higher security margin than SHA-256 and is recommended for applications requiring maximum security.

Bcrypt Hash

Generate Bcrypt hashes specifically designed for password storage. Includes built-in salt and configurable work factor to resist brute-force attacks.

Understanding Hash Functions

A cryptographic hash function is a mathematical algorithm that transforms input data of any size into a fixed-size string of characters. Hash functions are fundamental to modern cryptography and have several important properties.

Key Properties

  • • Deterministic: Same input always produces same output
  • • Fixed Output: Always generates same-length hash
  • • Fast Computation: Quick to calculate hash value
  • • Avalanche Effect: Small input change drastically changes output
  • • Irreversible: Cannot determine input from hash

Common Applications

  • • Password storage and verification
  • • Data integrity verification
  • • Digital signatures and certificates
  • • Blockchain and cryptocurrency
  • • File checksums and validation

Security Considerations

MD5 and SHA-1 are considered cryptographically broken and should not be used for security-sensitive applications. For password storage, always use specialized algorithms like Bcrypt, Scrypt, or Argon2 that include salt and are designed to be computationally expensive.