Hash Generator (SHA-256, SHA-1, SHA-512)
Generate SHA-256, SHA-1, and SHA-512 hashes from text instantly in your browser.
All conversions happen in your browser. No data is sent to our servers - see why that matters. Share links encode your input in the URL itself; nothing is stored on a server. Press Cmd/Ctrl + Enter to convert.
How to Generate a Hash
Type or paste your text into the input panel. The tool computes SHA-256, SHA-1, and SHA-512 digests simultaneously and displays each as a lowercase hex string you can copy.
What is a Cryptographic Hash?
A hash function maps any input to a fixed-length fingerprint. The same input always produces the same hash, but even a one-character change produces a completely different result - which makes hashes ideal for verifying data integrity.
Common Use Cases
Developers use hashes to verify file downloads against published checksums, generate cache keys, deduplicate content, fingerprint API payloads, and compare secrets without storing them in plain text.
Frequently Asked Questions
Which hash algorithms are supported?
The tool computes SHA-256, SHA-1, and SHA-512 in one pass using your browser's built-in Web Crypto API - the same implementation used for TLS.
Is my text sent to a server to be hashed?
No. Hashing happens entirely in your browser, so it is safe to hash passwords, API keys, or other sensitive values.
Which algorithm should I use?
Use SHA-256 for most purposes - checksums, integrity verification, and fingerprints. SHA-1 is provided for compatibility with legacy systems (like Git object IDs) but is considered broken for security purposes.
Can I reverse a hash back to the original text?
No. Cryptographic hashes are one-way functions. The only way to 'reverse' one is to guess inputs until one produces the same hash.