Hash Generator

About Hash Generator

Last updated: 25 August 2026

A hash function turns input of any length into a fixed-length fingerprint. The same input always produces the same hash, and changing a single character produces a completely different one. This tool generates MD5, SHA-1, SHA-256 and SHA-512 hashes in your browser.

Fixed length, one direction

Whatever you feed in, the output length is constant: MD5 gives 32 hex characters, SHA-1 gives 40, SHA-256 gives 64 and SHA-512 gives 128. The operation only runs one way — a hash cannot be decoded back into the original text, which is why hashes are used for integrity checks and password storage rather than for storing recoverable data.

Can a hash be reversed?

Not by computing an inverse — none exists. But a short or common input can be found by guessing: attackers precompute hashes of billions of likely passwords and look yours up. That is why password hashes need a unique salt and a deliberately slow algorithm such as bcrypt or Argon2, not a bare MD5.

Which algorithm should I choose?

For anything security-related, SHA-256 or SHA-512. MD5 and SHA-1 are both broken — practical collision attacks exist, meaning two different inputs can be made to share a hash. They remain fine for non-security uses such as cache keys or detecting accidental file corruption, and they are included here for those cases and for verifying legacy checksums.

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