Hash Generator

Professional hash generator for MD5, SHA-1, SHA-256, SHA-512 algorithms with file support, HMAC, and integrity verification.

Hash Generator

Generate secure hashes using MD5, SHA-1, SHA-256, SHA-512 algorithms with HMAC support

Input Type

Algorithm

Hash Type

Enter Text to Hash

Key Features

Support for MD5, SHA-1, SHA-256, SHA-512 algorithms

HMAC support for authenticated hashing

Text input and file upload capabilities

File integrity verification and checksums

Copy results to clipboard

Batch processing for multiple files

Understanding Hash Algorithms

MD5: 128-bit hash, fast but cryptographically broken. Use only for checksums

SHA-1: 160-bit hash, deprecated for security. Legacy compatibility only

SHA-256: 256-bit hash, current standard. Secure and widely supported

SHA-512: 512-bit hash, highest security. Best for sensitive applications

HMAC: Keyed hash for authentication. Prevents tampering and forgery

Tips & Use Cases

File Integrity: Verify downloaded files haven't been corrupted or tampered with

Password Storage: Hash passwords before database storage (with salt)

Digital Signatures: Create unique fingerprints for documents and data

API Security: HMAC authentication for secure API communication

Blockchain: Proof-of-work and transaction verification systems

Choose SHA-256+: For new projects, use SHA-256 or SHA-512 for security

Use HMAC for APIs: Combine with secret keys for authenticated requests

File Deduplication: Compare hash values to identify duplicate files efficiently

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Frequently Asked Questions

What's the difference between MD5, SHA-1, SHA-256, and SHA-512?

MD5 produces 128-bit hashes (fast but insecure), SHA-1 produces 160-bit hashes (deprecated), SHA-256 produces 256-bit hashes (current standard), and SHA-512 produces 512-bit hashes (highest security).

When should I use HMAC?

HMAC should be used when you need to verify both data integrity and authenticity. It's essential for API authentication, secure communications, and ensuring data came from a trusted source.

Can I use this tool for password hashing?

While this tool can hash passwords, it's not recommended for production password storage. Use specialized functions like bcrypt, scrypt, or Argon2 that include salt and computational expense.

How do I verify file integrity?

Calculate the hash of your original file, store the hash value, later recalculate the hash, and compare values. If they match, the file hasn't been modified or corrupted.

Are hash functions reversible?

No, cryptographic hash functions are one-way functions. You cannot reverse a hash to get the original input. However, weak hashes like MD5 can sometimes be cracked using rainbow tables.

What's the maximum file size I can hash?

File size limits are dynamically calculated based on your device's available memory (typically 100-500MB). Large files are processed entirely in your browser without any server uploads, ensuring complete privacy.

Is my data secure when using this tool?

All calculations happen locally in your browser using Web Crypto API. Your data never leaves your device, ensuring complete privacy and security.

Which algorithm should I choose for new projects?

For new projects, use SHA-256 or SHA-512. Avoid MD5 and SHA-1 for security-critical applications. Choose SHA-512 for maximum security or SHA-256 for balanced security and performance.