Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly.
0 characters • Hashes generated in real-time
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Recommended: SHA-256
256-bit output, secure for most applications. Used in Bitcoin, SSL certificates, and password hashing.
Avoid: MD5 for security
MD5 has known collision attacks. Only use for checksums, not passwords or signatures.
Algorithm comparison
| Algorithm | Output | Security | Use Case |
|---|---|---|---|
| MD5 | 128-bit | Broken | Checksums only |
| SHA-1 | 160-bit | Deprecated | Legacy systems |
| SHA-256 | 256-bit | Secure | General purpose |
| SHA-512 | 512-bit | Secure | High security |
Frequently Asked Questions
Which hash algorithm should I use?
For most purposes, use SHA-256. It's secure, widely supported, and part of the SHA-2 family. Avoid MD5 for security-sensitive applications.
Is MD5 safe to use?
MD5 is cryptographically broken and should not be used for security purposes like password hashing or digital signatures. It's fine for checksums and data integrity verification where security isn't a concern.
What's the difference between SHA-256 and SHA-512?
SHA-512 produces a longer 512-bit hash and is slightly faster on 64-bit systems. SHA-256 is more widely used and sufficient for most applications.
Can hashes be reversed?
No. Hash functions are one-way — you cannot reverse a hash to get the original input. This is why they're used for password storage.
Is my data uploaded anywhere?
No. All hashing is performed entirely in your browser using JavaScript. Your data never leaves your device.