Hash Generator (MD5, SHA) Online — Free Tool
Compute cryptographic hashes including MD5, SHA-1, SHA-256, SHA-384, and SHA-512 securely in your browser.
Hash
Uses the browser Web Crypto API (no server).
Privacy note: All processing happens entirely in your browser. No data is sent to our servers.
About this tool
Cryptographic hashes map input to a fixed-length fingerprint. Use MD5, SHA-1, SHA-256, or SHA-512 to verify file integrity, cache keys, or checksums—computed entirely in your browser.
Hashes are one-way: you cannot recover the original text from the digest. Identical input always yields identical output.
Common use cases
- Verifying download checksums against published hashes
- Generating cache keys from normalized strings
- Comparing whether two texts differ without storing plaintext
- Learning how digest algorithms format output
How to use
- Enter text or select a file to hash.
- Choose algorithm (MD5, SHA-256, etc.).
- View hex digest output instantly.
- Copy the hash to compare with expected checksums.
This page is available at /tools/hash-generator/.
Understanding the result
- Any tiny input change produces a completely different digest (avalanche effect).
- SHA-256 and SHA-512 are preferred for security; MD5 and SHA-1 are legacy only.
- Hex output length doubles with bit strength—SHA-256 produces 64 hex characters.
- Same input always gives same hash; salt passwords before hashing in real auth systems.
Related tools
Password Strength Checker
Evaluate password vulnerability using client-side algorithms and receive actionable security recommendations.
QR Code Generator
Instantly create scannable QR codes from text, URLs, or contact information without tracking.
Secure Password Generator
Generate highly secure, randomized passwords locally to protect your accounts and sensitive information.
UUID Generator
Generate cryptographically secure version 4 Universally Unique Identifiers (UUIDs) instantly.
FAQ
Which hash should I use?
SHA-256 for general integrity. Avoid MD5/SHA-1 for security-sensitive use.
Can I hash files?
Yes, if the tool supports file input—useful for verifying downloads.
Is hashing reversible?
No. Hashes are one-way functions designed to prevent recovering input.
Is my input sent to a server?
No. Hashing runs locally in your browser.