Free Online Hash Generator - MD5, SHA256

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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. Hashes are one-way functions - you can generate a hash from data, but you cannot reverse it to get the original data. They're used for password storage, data integrity verification, and digital signatures.

How to Use Hash Generator

Enter or paste your text in the input area
Click 'Generate Hashes' to compute all hash values
View MD5, SHA-1, SHA-256, and SHA-512 results
Copy any hash value using the copy buttons

Hash Generator Features

Generate multiple hash types simultaneously
Support for MD5, SHA-1, SHA-256, SHA-512
Instant hash computation
Individual copy buttons for each hash
Works entirely in your browser - data never sent to servers

Hash Generator FAQ

Which hash algorithm should I use?

For security purposes, use SHA-256 or SHA-512. MD5 and SHA-1 are considered cryptographically broken and should only be used for checksums or non-security purposes.

Can I decrypt a hash back to the original text?

No, hash functions are one-way. You cannot reverse a hash to get the original input. This is why hashes are used for password storage.

Why do different texts produce the same-length hash?

Hash functions always produce fixed-length output regardless of input size. SHA-256 always produces 64 hex characters (256 bits), whether you hash 'a' or an entire book.