Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text. Compare and verify hash values.

Input Text

How to Use the Hash Generator

Enter or paste your text in the input field, select the hash algorithms you want, and the hashes will be generated instantly. You can click the copy button next to any hash to copy it to your clipboard. This tool runs entirely in your browser using the Web Crypto API — your data never leaves your device.

Choosing the Right Hash Algorithm

For general file integrity checks, SHA-256 is the standard choice. MD5 and SHA-1 are faster but should not be used for security purposes as they are vulnerable to collision attacks. SHA-512 offers the highest security but produces longer hashes. For password hashing in applications, use specialized algorithms like bcrypt or Argon2 instead of these general-purpose hash functions.

Frequently Asked Questions

What is a hash function?

A hash function is a mathematical algorithm that converts input data of any size into a fixed-size string of characters (the hash). The same input always produces the same hash, but even a small change in the input produces a completely different hash.

What is the difference between MD5 and SHA-256?

MD5 produces a 128-bit (32 character) hash and is faster but considered cryptographically broken. SHA-256 produces a 256-bit (64 character) hash and is much more secure. Use SHA-256 or SHA-512 for security-sensitive applications.

Can you reverse a hash to get the original text?

No. Hash functions are one-way functions by design. You cannot mathematically reverse a hash to obtain the original input. This property makes hashes useful for storing passwords and verifying data integrity.

What are hashes used for?

Hashes are used for password storage, data integrity verification, digital signatures, file deduplication, and blockchain technology. When you download a file, you can compare its hash to the published hash to verify it was not tampered with.