Hash Generator

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Compare hashes.

100% private - everything runs in your browser, no data is sent anywhere

Compare Hashes

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What Are Cryptographic Hashes and How Do They Work?

A cryptographic hash function takes any input (text, file, data) and produces a fixed-length output called a hash or digest. The same input always produces the same hash, but even a tiny change in input produces a completely different hash. Hashes are one-way functions - it is computationally impossible to reverse a hash to get the original input.

Hash functions are fundamental to digital security - passwords are stored as hashes (never in plain text), file integrity is verified by comparing hashes, digital signatures use hashes to authenticate documents, and blockchain transactions are secured by cryptographic hashes. Our tool runs entirely in your browser with no data sent to servers.

Hash Algorithm Comparison

  • MD5: 128-bit, fast, NOT secure for passwords, good for file checksums
  • SHA-1: 160-bit, deprecated, avoid for security
  • SHA-256: 256-bit, current standard, used in Bitcoin, SSL certificates
  • SHA-512: 512-bit, maximum security, used for highly sensitive data

Frequently Asked Questions

What is a hash and what is it used for?+
A hash is a fixed-size string generated from input data using a mathematical algorithm. It is used for data integrity verification, password storage, and checksums.
What hash algorithms are supported?+
The tool supports MD5, SHA-1, SHA-256, SHA-384, and SHA-512 algorithms.
Is hashing the same as encryption?+
No. Hashing is a one-way process. You cannot reverse a hash to get the original data, unlike encryption which is reversible with a key.