How to use
- Enter text.
- Pick an algorithm.
- Compute and view the digest.
FAQ
Can a hash be reversed?
No. A hash is a one-way digest — you can compute it from the input but not recover the input from the hash, so it verifies rather than encrypts.
MD5 or SHA-256 — which is safer?
SHA-256 is safer. MD5 is broken by known collision attacks and should not be used for security, only for non-security comparisons.
How do I verify a file with a hash?
Hash the downloaded file with SHA-256 and compare with the publisher's digest; a match means it was not tampered with.
Is SHA-1 still okay?
SHA-1 is also deprecated for security (known collisions); new work should use SHA-256 or SHA-512.
Is the hash of the same text always identical?
Yes. Same input always yields the same digest; changing even one character produces a completely different hash (avalanche effect).
What is the difference between hashing and encryption?
Encryption is reversible with a key; hashing is not and only proves integrity. They serve different purposes and are not interchangeable.
About this Hash Calculator
SHA via Web Crypto, MD5 local. One-way digests for integrity checks. Local only.