Instantly generate the MD5, SHA-1, SHA-256 and SHA-512 hashes of a text — all locally, in your browser, without sending anything to a server.
Text to hash
Type any text; the MD5, SHA-1, SHA-256 and SHA-512 hashes are computed instantly, locally.
b354a562e5bd8e34140deab28755f289………Everything runs in your browser — your text is never sent anywhere. MD5 and SHA-1 are not safe for passwords.
SHA-256(calcula.live) = …Handy everyday tools. Simple, fast calculations for common situations. Everything runs instantly in your browser, no account, no data sent.
A hash function turns a text of any length into a fixed-length fingerprint. It is deterministic (same text → same hash) and irreversible:
The text abc has MD5 = 900150983cd24fb0d6963f7d28e17f72 and SHA-256 = ba7816bf…f20015ad. Any change to the text changes the hash completely.
A hash is a fixed-length "fingerprint" of a text, produced by a mathematical function. The same text always gives the same hash, but you cannot reconstruct the text from the hash.
MD5 produces 128 bits and is old and insecure (it has collisions). SHA-256 produces 256 bits and is considered secure, widely used today. SHA-1 is also outdated.
No. A hash is not encryption — it is irreversible by definition. It can only be "cracked" by guessing (dictionary/brute force) for short or common texts.
Verifying file integrity (checksums), storing passwords safely (with a salt), digital signatures and indexing. Each purpose needs a suitable algorithm.
No. MD5 and SHA-1 are fast and vulnerable. For passwords, use slow, dedicated functions (bcrypt, scrypt, Argon2) with a unique salt per user.
Because the function is deterministic. This property enables verification: you recompute the hash and compare it with the expected one to confirm the data has not changed.
No. The computation happens entirely in your browser; the text you enter never leaves your device and is not stored by us.