Hash Generator
Compute SHA-256, SHA-512 and SHA-1 digests instantly
Hash Generator: Fingerprint Your Data
The same input always gives the same digest — change one character and everything changes.
A cryptographic hash is a fixed-length fingerprint of data: the same text always produces the same digest, yet changing a single character transforms the output completely. That property makes hashing a cornerstone of modern security — file integrity checks, password storage, digital signatures, blockchains. This tool computes the SHA-256, SHA-512 and SHA-1 digests of your text simultaneously, using the browser's built-in Web Crypto engine — meaning your data never leaves your device. Results update live as you type, and each row has its own copy button. Today's standard is SHA-256; SHA-1 is listed only for legacy compatibility.
Features
Three Algorithms
SHA-256, SHA-512 and SHA-1 computed together.
Live Computation
Digests update instantly as you type.
Web Crypto
The browser's built-in crypto engine — data stays local.
One-Click Copy
Each algorithm's output copies separately.
Hash Guide
Algorithm comparison
- SHA-256: 64 hex chars — today's standard
- SHA-512: 128 hex chars — longer, fast on 64-bit systems
- SHA-1: 160 bits — BROKEN, legacy compatibility only
- MD5: insecure — deliberately absent from this tool
Use cases
- File integrity: verifying download checksums
- Password storage (salted hashes on servers)
- Digital signatures and certificates
- Git commit IDs and blockchains
Frequently Asked Questions
Is a hash encryption? Can it be reversed?
No — hashing is one-way: there's no mathematical path from digest back to the original. Encryption is two-way (a key decrypts); a hash is a fingerprint. 'Hash cracking' sites actually search enormous precomputed tables.
Why is MD5 missing?
MD5's collision resistance has been broken since 2004 — two different inputs can produce the same digest. Listing it as a security tool would create false confidence, so we deliberately left it out.
Is SHA-1 still usable?
Not for new designs — a practical collision attack (SHAttered) was demonstrated in 2017. We list it purely for legacy compatibility. Use SHA-256 or SHA-512 for anything new.
Does the same text give different hashes on different devices?
No — identical bytes produce identical digests everywhere; that's the whole point of the standard. If you see different results, the usual causes are invisible characters, line-ending differences (\n vs \r\n) or leading/trailing spaces.
Is my text sent to a server?
No. Computation uses the browser's built-in Web Crypto API entirely on your device. Sensitive strings like passwords are safe to hash here.
Can I use this hash to store my passwords?
Plain SHA-256 isn't enough for password storage — its speed makes brute force easy. Systems should store passwords with deliberately slow, salted algorithms like bcrypt, scrypt or Argon2.