Hash Generator
Generate SHA-256, SHA-1, and SHA-512 hashes. Free, no signup.
How It Works
Enter any text and click Generate Hashes. Multiple hash algorithms run simultaneously using the Web Crypto API built into your browser. Click any hash to copy it. No data is ever sent to a server.
What Are Hash Functions?
A cryptographic hash function takes any input and produces a fixed-length string of characters. The same input always produces the same hash, but even a tiny change produces a completely different result. Hashes are used for verifying file integrity, storing passwords, and digital signatures.
Supported Algorithms and Output Length
Each algorithm produces a fixed-length lowercase hexadecimal digest, regardless of how long your input is:
| Algorithm | Output bits | Hex characters |
|---|---|---|
| SHA-1 | 160 | 40 |
| SHA-256 | 256 | 64 |
| SHA-384 | 384 | 96 |
| SHA-512 | 512 | 128 |
SHA-1 is included for compatibility with older systems but is no longer considered secure against collisions. Prefer SHA-256 or SHA-512 for new work.
Common Uses
Verify that a downloaded file matches its published checksum, generate a stable fingerprint for a piece of text, create a cache key, or confirm two inputs are identical without comparing them character by character. Because hashing runs locally, you can safely hash sensitive text without it leaving your browser.
Frequently Asked Questions
How do I generate a hash from text?
Type or paste your text into the box and click Generate Hashes. The tool computes SHA-256, SHA-384, SHA-512, and SHA-1 at once and shows each as a lowercase hexadecimal string. Click any result to copy it.
Which hash algorithms does this tool support?
It generates SHA-256, SHA-384, SHA-512, and SHA-1. These use the browser's built-in Web Crypto API, which is a genuine cryptographic implementation.
Can it generate an MD5 hash?
No. MD5 is not supported because the browser's Web Crypto API does not provide it. MD5 is also considered broken for security use, so SHA-256 or SHA-512 is the recommended choice for integrity checks.
Is the text I hash sent to a server?
No. Hashing runs entirely in your browser using crypto.subtle, so the text you enter never leaves your device and nothing is uploaded or stored.
Should I use a hash to store passwords?
Not a plain hash on its own. Password storage needs a slow, salted algorithm such as bcrypt or Argon2. If you just need a strong random password, use the password generator instead.