Encoding & Crypto · Free Tool
Hash Generator (MD5, SHA-1, SHA-256)
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text — computed instantly in your browser.
About this tool
Type or paste any text and get its MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously. SHA hashes are computed with the browser's native Web Crypto API; nothing is sent to any server.
Hashes are one-way digital fingerprints: the same input always produces the same output, but the output cannot be reversed. They are used to verify file integrity, compare values without storing them, and generate cache keys or checksums.
Common uses
- Verify a downloaded file's published checksum matches
- Generate a deterministic cache key or content fingerprint
- Compare two pieces of text for exact equality via their digests
Frequently asked questions
Are MD5 and SHA-1 still safe to use?
Not for security. Both are cryptographically broken for collision resistance and must not be used for passwords or signatures. They remain fine for non-security uses like checksums and cache keys. For anything security-related, use SHA-256 or stronger.
Can a hash be decrypted back to the original text?
No — hashing is one-way by design. "Cracking" a hash actually means guessing inputs until one produces the same hash, which is why long, unique inputs are effectively irreversible.
Is my data uploaded to a server?
No. This tool runs entirely in your browser using JavaScript — nothing you type is transmitted, logged, or stored anywhere. You can even use it offline once the page has loaded.