Cryptography
SHA Hash Calculator
Compute SHA-256, SHA-384, SHA-512, or legacy SHA-1 digests from text or a local file. Output Hex and Base64 in your browser only.
Free to use — no sign-up or login.
Runs entirely in your browser; input is not sent to our servers.
Messages, keys, passwords, plaintext, ciphertext, and files are never stored in
localStorage, history, or analytics payloads.
Max file size is limited because Web Crypto digest is not streaming.
Digest (Hex)
Digest (Base64)
This free SHA Hash Calculator covers Compute SHA-256, SHA-384, SHA-512, or legacy SHA-1 digests from text or a local file. Output Hex and Base64 in your browser only.
Enter the SHA Hash Calculator fields, then read the output. Cryptography calculators on this site keep the formula visible beside the form, with no account required.
Using the SHA Hash Calculator
Compute SHA-256, SHA-384, SHA-512, or legacy SHA-1 digests from text or a local file. Output Hex and Base64 in your browser only. Typical inputs are Algorithm and Message (text). How it works beside the form states the identity the SHA Hash Calculator applies.
FAQ
Is hashing the same as encryption?
No. A hash is one-way: you cannot recover the original message from the digest. Encryption is reversible with the correct key. Use hashes for integrity checks and fingerprints, not for hiding recoverable data.
Why is SHA-1 marked legacy?
SHA-1 collision attacks are practical; do not use it for signatures, certificates, or password storage. Prefer SHA-256 or stronger. This tool still offers SHA-1 only for verifying old digests.
Does this upload my file or text?
No. Digests are computed with Web Crypto in your browser. Nothing is sent to the server for hashing.