Hash Generator
Create SHA-256, SHA-1, SHA-384 and SHA-512 hashes from any text — instantly and securely.
Generate secure hashes from any text
The Hash Generator computes cryptographic hashes of your text using the SHA family of algorithms — SHA-256, SHA-1, SHA-384, and SHA-512. Type or paste text, pick an algorithm, and the hash updates instantly. All hashing is performed locally in your browser with the built-in Web Crypto API, so your input never leaves your device.
What is a hash?
A hash function takes input of any length and produces a fixed-length string of characters called a digest. The same input always produces the same digest, but even a tiny change to the input completely changes the output. Crucially, hashing is one-way: you cannot reverse a digest back into the original text. These properties make hashes ideal for verifying data integrity and fingerprinting content.
The SHA algorithms compared
| Algorithm | Output length | Notes |
|---|---|---|
| SHA-1 | 160-bit (40 hex) | Legacy; avoid for security, fine for checksums |
| SHA-256 | 256-bit (64 hex) | The modern default, widely used |
| SHA-384 | 384-bit (96 hex) | Truncated SHA-512, stronger margin |
| SHA-512 | 512-bit (128 hex) | Largest digest, strong integrity |
Common uses for hashes
- Integrity checks — verify a file or message has not changed by comparing digests.
- Checksums — confirm a download matches the published hash.
- Deduplication — detect identical content by comparing hashes.
- Caching keys — generate a compact, stable key for a piece of content.
How to use it
- Select an algorithm (SHA-256 is the recommended default).
- Type or paste your text.
- The hash appears immediately — click Copy to grab it.
A note on security
SHA-1 is no longer considered safe against deliberate collision attacks, so avoid it for digital signatures or security-critical comparisons; SHA-256 or higher is recommended. Also remember that plain hashing is not suitable for storing passwords — passwords require a slow, salted algorithm such as bcrypt or Argon2. For verifying integrity and generating fingerprints, the SHA hashes here are exactly the right tool.
Private and instant
Hashing happens entirely in your browser using the native Web Crypto API. Your input is never uploaded, logged, or stored, and results appear instantly even for long text.
Frequently asked questions
Which hash algorithm should I use?
SHA-256 is the modern default for most purposes. Use SHA-512 for a larger digest, and avoid SHA-1 for security-critical work.
Is my text sent to a server?
No. Hashing is performed locally in your browser with the Web Crypto API. Nothing is uploaded or stored.
Can I reverse a hash?
No. Cryptographic hashes are one-way functions and cannot be decoded back into the original text.
Can I use this to hash passwords?
Plain SHA hashes are not suitable for password storage. Use a slow, salted algorithm like bcrypt or Argon2 for passwords.
Why is there no MD5?
MD5 is cryptographically broken. This tool focuses on the SHA family; SHA-256 is a strong, widely supported replacement.