Free Hash Generator — MD5, SHA-1, SHA-256, SHA-512
Type or paste text and all four hashes are computed instantly, locally, in your browser.
| MD5 | |
|---|---|
| SHA-1 | |
| SHA-256 | |
| SHA-512 |
Frequently Asked Questions
Which hash algorithm should I use?
For anything security-related, use SHA-256 or SHA-512. MD5 and SHA-1 are cryptographically broken (collisions can be manufactured) and should only be used for non-security purposes like checksums, cache keys, or comparing against legacy values.
Can a hash be reversed to get the original text?
No — hashes are one-way functions. However, short or common inputs (like passwords) can be found via precomputed lookup tables, which is why passwords should be hashed with salted, purpose-built algorithms like bcrypt or Argon2, not plain SHA-256.
Why does the same text always produce the same hash?
That is the defining property of a hash function: deterministic output. Even a one-character change produces a completely different hash, which makes hashes ideal for verifying data integrity.
Is my text sent to a server to be hashed?
No. SHA hashes are computed with your browser's built-in Web Crypto API and MD5 with local JavaScript. Nothing leaves your device.