Hash Generator
?About this tool, how to use it, and FAQ▾
What is a hash generator?
A cryptographic hash turns any input into a fixed-length fingerprint: the same input always produces the same hash, and any change to the input produces a completely different one. This tool generates MD5, SHA-1, SHA-256, and SHA-512 digests from text — individually or all four at once for easy comparison.
Hashes are one-way (you cannot recover the input from the digest) and are used for integrity checks, cache keys, deduplication, and verifying downloads against published checksums.
How to use
- Paste or type the text to hash.
- Pick an algorithm, or select all to generate MD5, SHA-1, SHA-256, and SHA-512 together.
- Compare the output against an expected checksum — any difference means the input differs.
Frequently asked questions
Which hash algorithm should I use?
SHA-256 is the modern default. MD5 and SHA-1 are cryptographically broken (collisions can be manufactured) and should only be used for non-security purposes like cache keys or matching legacy checksums.
Can a hash be decrypted back to the original text?
No — hashing is one-way and loses information. Attackers instead precompute hashes of common inputs (rainbow tables), which is why short or common strings are guessable from their hash even though the function itself is irreversible.
Is a hash the same as encryption?
No. Encryption is reversible with a key; hashing has no key and no way back. Use encryption to protect data you need again, and hashes to verify integrity or store password digests (with salt and a slow KDF — not plain MD5/SHA).