Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text. All hash digests are computed simultaneously using the Web Crypto API. Everything runs in your browser.
Algorithm Comparison
| Algorithm | Output | Security | Use Case |
|---|---|---|---|
| MD5 | 128 bits (32 hex) | Broken | File checksums, non-security deduplication |
| SHA-1 | 160 bits (40 hex) | Deprecated | Git commits, legacy systems |
| SHA-256 | 256 bits (64 hex) | Secure | TLS, Bitcoin, JWT, digital signatures |
| SHA-384 | 384 bits (96 hex) | Secure | TLS 1.2+, government standards |
| SHA-512 | 512 bits (128 hex) | Secure | Password storage, high-security applications |
Frequently Asked Questions
What is a hash function?
A cryptographic hash function takes an input of any size and produces a fixed-size output (the “digest”). The same input always produces the same output, but even a tiny change in input produces a completely different hash. Hash functions are one-way — you cannot reverse a hash back to its original input.
Which hash algorithm should I use?
For security purposes, use SHA-256 or SHA-512. MD5 and SHA-1 have known collision vulnerabilities and should not be used for security. MD5 is still acceptable for non-security use cases like file checksums and cache keys. SHA-256 is the most widely used secure hash algorithm today.
Can I decrypt a hash back to the original text?
No. Hash functions are one-way by design. You cannot mathematically reverse a hash to recover the original input. “Hash cracking” tools work by hashing many possible inputs and comparing results, not by reversing the function. This is why longer, more complex inputs are harder to crack.
Is my data safe?
Yes. SHA hashes are computed using your browser's built-in Web Crypto API, and MD5 is computed with a pure JavaScript implementation. No data is sent to any server. Everything runs entirely in your browser.