Password Hash Generator & Converter

Convert any text or password into a cryptographic hash. Supports MD5, SHA-256, bcrypt, and more for development and security purposes.

Password/Text

Hash Algorithm

Add Salt

Iterations (for key stretching)

About Password Hashing

Hashing converts passwords into fixed-length strings that cannot be reversed. Use salt to protect against rainbow table attacks. Multiple iterations (key stretching) make brute-force attacks more difficult. SHA-256 or stronger algorithms are recommended for security-critical applications.

How It Works

This password hash generator creates cryptographic hash values from your input text using various algorithms like MD5, SHA-256, SHA-512, and bcrypt.

The hashing process:

Input processing: Your text is converted to bytes using UTF-8 encoding.
Algorithm application: The selected hash function processes the input through multiple rounds of mathematical operations.
Fixed-length output: Regardless of input size, the output is always the same length for each algorithm.
Hex encoding: The binary hash result is displayed as hexadecimal characters for easy copying.

Hash functions are one-way - you can't reverse a hash to get the original text. This makes them perfect for password storage and data integrity verification.

When You'd Actually Use This

Database Password Storage

Generate secure hashes for storing user passwords in databases without keeping plaintext.

File Integrity Verification

Create checksums to verify files haven't been corrupted or tampered with during transfer.

API Authentication Tokens

Generate hash-based tokens for API authentication and request signing.

Blockchain and Crypto

Create hash values for blockchain transactions, wallet addresses, and proof-of-work calculations.

Digital Signatures

Hash documents before signing to create compact, secure digital signatures.

Learning Cryptography

Experiment with different algorithms to understand how hash functions work and their output differences.

What to Know Before Using

MD5 and SHA-1 are broken

These older algorithms have known collision vulnerabilities. Use SHA-256 or better for security applications.

Hashing isn't encryption

Hashes can't be reversed. If you need to retrieve the original data, use encryption instead.

Always salt password hashes

Add random data to passwords before hashing to prevent rainbow table attacks. bcrypt does this automatically.

bcrypt is for passwords

Unlike SHA algorithms, bcrypt is intentionally slow, making it resistant to brute force attacks on passwords.

Same input = same hash

Hash functions are deterministic. The same input always produces the same output for a given algorithm.

Common Questions

Which hash algorithm should I use?

For general purposes: SHA-256. For passwords: bcrypt or Argon2. Avoid MD5 and SHA-1 for any security-sensitive application.

Why are hash outputs different lengths?

Each algorithm produces a fixed output size. MD5 = 32 chars, SHA-1 = 40 chars, SHA-256 = 64 chars, SHA-512 = 128 chars.

Can two different inputs produce the same hash?

Theoretically yes (collision), but with SHA-256 it's so improbable it's considered impossible for practical purposes.

What's the difference between SHA-256 and bcrypt?

SHA-256 is fast (good for data integrity). bcrypt is slow (good for passwords - slows down attackers).

How do I verify a password against a hash?

Hash the entered password with the same algorithm (and salt), then compare the hashes. If they match, the password is correct.

What's a rainbow table?

A precomputed table of hashes for common passwords. Salting prevents rainbow table attacks by making each hash unique.

Is it safe to hash passwords in the browser?

For transmission yes, but always hash again on the server. Browser hashing alone doesn't protect against database breaches.

Other Free Tools

Search tools