Hash Generator

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes.

Last updated: 14 August 2026

Processed locally — your files are not uploaded to any server.

Comprehensive Guide & Specifications

Everything you need to know about using Hash Generator effectively.

What is Hash Generator and Why Use It?

A hash is a fixed-length fingerprint of some input, and this produces one using the Web Crypto API — the same implementation the browser relies on for HTTPS. Paste text, choose SHA-256, SHA-1, SHA-384 or SHA-512, and copy the hex digest. The same input always yields the same digest while changing a single character changes the output completely, which is what makes hashes useful for comparing two values, verifying a file listing, or checking that a payload matches what a system expects. Three limits are worth carrying away. Hashing is one-way, so no button turns a digest back into the original. SHA-1 is broken for security purposes and is offered only for checking against legacy systems. And plain hashing is unsuitable for storing passwords, which need a slow, salted algorithm such as bcrypt, scrypt or Argon2 instead. MD5 is deliberately absent, because the browser's crypto API does not provide it and it should not be used for new work.

Step-by-Step Instructions

1
Enter or paste the string you wish to hash into the input field.
2
Select your desired algorithm: SHA-256, SHA-512, SHA-384, or SHA-1.
3
Instantly view and copy the resulting lowercase or uppercase hex digest.

Formula / Calculations Explained

Cryptographic One-Way Hashing Digest

Processes arbitrary-length input through deterministic cryptographic compression functions to produce a fixed-length hexadecimal digest.

Important Considerations

Hashing is one-way by design — there is no button that turns a digest back into the original text.
SHA-1 is broken for anything security-related and is offered only for checking against legacy systems that still use it.
Plain hashing is not suitable for storing passwords. Those need a slow, salted algorithm such as bcrypt, scrypt or Argon2.
MD5 is deliberately absent: the browser's crypto API does not provide it, and it should not be used for new work.

Frequently Asked Questions

Can a cryptographic hash be decrypted back to the original text?▼

No. Hashes are mathematical one-way functions designed so that reversing the output to determine the original input is practically impossible.

Which hash algorithm is recommended for security?▼

SHA-256 or SHA-512 are universally recommended for digital signatures, token verification, and data integrity checks.

Is my text private while hashing?▼

Yes. Hashes are calculated using the native W3C Web Cryptography API inside your browser, so sensitive credentials never leave your machine.

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