Hash Generator — SHA-1, SHA-256, SHA-384, SHA-512

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SHA-256 and friends, computed by your browser's own crypto engine — text in, digest out, nothing uploaded.

Text to hash

One-way by design: the same text always gives the same digest, but the digest can never be reversed to the text.

How to use this tool

1. Type or paste your text (hashing starts automatically).
2. Read the four digests — SHA-256 is today's general-purpose standard.
3. Copy the SHA-256 digest if you need it for verification or deduplication.

Example

hello → SHA-256 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824. Change one letter — 'Hello' — and the digest becomes completely different: 185f8db32271fe25f561a6fc938b2e26… This is the avalanche effect.

The formula

digest = SHA(text) — fixed-length output (160/256/384/512 bits) regardless of input size

What the result means

A hash is a fingerprint: deterministic (same input, same digest), avalanche (any change rewrites everything), and one-way (no algorithm recovers the input). That trio powers file integrity checks, password storage (with salting), deduplication and blockchain links. SHA-1 is shown only because legacy systems still ask for it — for anything new, use SHA-256 or better.

Frequently asked questions

Why is SHA-1 in the list if it's broken?

Collision attacks exist against SHA-1, so it's retired for security uses — but terabytes of legacy systems still request it. It's here for compatibility, marked with a warning label in spirit.

Can a hash be reversed to reveal the original text?

No — not by computation. 'Reversal' sites just look up precomputed tables of common inputs; unique, random inputs have no entries to find.

How are passwords hashed then?

With special password algorithms (bcrypt, Argon2) that are deliberately slow and salted — SHA alone is too fast, making leaked-hash cracking cheaper. Different tools for different jobs.

Is my text uploaded?

No — hashing happens in your browser via the Web Crypto API.

More tools from Safe Harbor

Password Strength CheckerJudge an existing passwordPassword GeneratorStrong random passwordsRandom Token GeneratorAPI keys & secretsBase64 Encoder/DecoderOn Circuit Cove

Explore the island world

• Safe Harbor — the island where this tool lives.
• The Main Island — drive the boat, explore the whole world.
• The 90s Kids Island — where most of us started.

Privacy & data: this tool runs entirely in your browser — nothing you type is uploaded, saved or sent anywhere. · Disclaimer: everything is generated or checked locally in your browser — nothing you type is transmitted, stored or logged anywhere. · Privacy Policy · Disclaimer