Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text.
Key Features
- Generates SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any input text.
- Updates the hash output in real time as you type so you can see the effect of each change.
- Displays all four hash lengths simultaneously for easy comparison.
- Copies any hash to the clipboard instantly with a dedicated copy button.
- Runs entirely in the browser using the Web Crypto API — your data stays on your device.
- Useful for verifying checksums, testing hash functions, and learning cryptography.
Frequently Asked Questions
What is a cryptographic hash used for?
Hashes are used to verify file integrity, store passwords securely, and generate unique identifiers. A hash is a one-way function — you cannot reverse it to obtain the original input.
Is SHA-1 still safe to use?
SHA-1 is considered cryptographically broken for security-sensitive uses such as digital signatures. Use SHA-256 or higher for any security application. SHA-1 is still acceptable for non-security checksums.
Is my input text sent to a server to generate the hash?
No. Hashing is performed locally in your browser using the native Web Crypto API. Your input never leaves your device.
Why does the same text always produce the same hash?
Hash functions are deterministic — identical input always produces identical output. Even a single character change produces a completely different hash, a property called the avalanche effect.