Hash Generator (MD5, SHA-1, SHA-256)
Generate MD5, SHA-1, and SHA-256 hashes from any text instantly. Free online hash generator with one-click copy.
— — — How to Generate Hashes
Type or paste any text into the input field. MD5, SHA-1, and SHA-256 hashes are computed instantly in your browser. No data is sent to any server.
Hash Algorithm Reference
- MD5 — 128-bit hash. Fast but not collision-resistant. Useful for checksums, not security.
- SHA-1 — 160-bit hash. Deprecated for certificates but still used in Git and legacy systems.
- SHA-256 — 256-bit hash from the SHA-2 family. Recommended for integrity checks and security applications.
Frequently Asked Questions
Is my data sent to a server?
No. All hashing is performed entirely in your browser using the Web Crypto API (SHA) and a JavaScript implementation (MD5). Your text never leaves your device.
Which hash algorithm should I use?
For security purposes (password storage, digital signatures), use SHA-256. MD5 and SHA-1 are considered weak against collision attacks. For non-security checksums (file integrity), MD5 is still commonly used due to its speed.
Can I reverse a hash back to the original text?
No. Cryptographic hash functions are one-way — you cannot derive the original input from the hash output. This is by design and is what makes hashing useful for password storage and integrity verification.