All tools · 🔐 Crypto / Hash
🔐 Hash Generator
Hashes turn arbitrary text into a fixed-length fingerprint. Used for verifying file integrity, password storage (with salting!), generating cache keys, and content addressing. We use the browser's Web Crypto API for SHA family, and a pure-JS MD5 implementation.
Examples
hello2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824hello5d41402abc4b2a76b9719d911017c592Use only for non-security tasks like file checksums.
The quick brown fox2acbed7b8721d4f0e7a9a7f4afef3f63a4d2cb8bFrequently asked questions
Which hash should I use for passwords?
None of these directly. Use bcrypt, scrypt, or Argon2 — they are deliberately slow and include salting. Plain SHA/MD5 are too fast and unsafe for password storage.
Is MD5 secure?
No. MD5 is cryptographically broken (collisions can be generated cheaply). It is still fine for non-adversarial uses like file integrity checks where you control both ends.
What does SHA-256 produce?
A 256-bit (32-byte) digest, usually displayed as 64 hexadecimal characters. SHA-512 produces 128 hex characters.
Why do the same input always produce the same hash?
Hash functions are deterministic by design — same input, same output. That is what makes them useful for verification and indexing.
Can I reverse a hash to get the original?
Not by design. But common passwords can be looked up in pre-computed tables (rainbow tables), which is why salting is essential for password storage.
About this tool
Hash Generator runs entirely in your browser using standard Web APIs. No data is sent to any server. The source for this tool is in our public GitHub repository.
Related tools
- 🔐 JWT Decoder — Decode JWT header and payload. Validates signature format (does not verify HMAC).
Why this tool
vs typical free web-tool sites
| 1vw | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for premium features) |
| Ads inside the tool | No | Yes (banner + video) |
| Data sent to server | No (browser-only) | Yes (inputs analyzed for ads) |
| Total tools | 96 | Often <20 or scattered across sites |
| Bookmarkable URL per tool | Yes | Mixed |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Open source | Yes | No |