Hash Generator (SHA-256, MD5)
Generate SHA-256 and MD5 hashes of any text entirely in your browser, so inputs never leave your device.
About Hash Generator (SHA-256, MD5)
Verifying that data hasn't been tampered with usually starts with hashing — turning any text into a fixed-length fingerprint that changes completely if even one character changes. This tool computes SHA-256 and MD5 digests for whatever you paste, giving you a quick, reproducible way to check integrity.
Hashing runs entirely in the browser using the Web Crypto API, so the text you hash never leaves your device. Choose SHA-256, MD5, or both, and the tool returns the hex digest instantly. Because hashes are deterministic, the same input always produces the same output, which is what makes comparison possible.
Developers use it to sanity-check an API response, verify a downloaded file's checksum, or confirm two strings match without comparing them directly. Support teams use it to check that a copy-pasted value is intact, and QA engineers rely on it when validating deterministic test fixtures.
How to Use
- Paste or type the text to hash.
- Choose SHA-256, MD5, or both.
- Copy the hexadecimal hash output.
Example
"hello" SHA-256: 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824
Hashing 'hello' with SHA-256 always produces this exact 64-character hex digest, a property called determinism.
FAQ
Is hashing the same as encryption?
No. Hashing is one-way: you can't recover the input from a hash. Encryption is reversible with a key.
Why would I use MD5 if it's insecure?
MD5 is no longer safe for security but still appears in checksums and legacy systems, so this tool supports it for compatibility.
Can it hash large files?
This tool hashes text. Files can be hashed in a browser too, but that's a separate feature best built as its own tool.
What exactly does hashing do to my input?
It runs the input through a one-way algorithm that produces a fixed-length string, usually shown in hex. It's deterministic — same input, same digest — but irreversible, so you can't work backwards from the hash to the original text.
Why would I hash the same text twice?
Hashing twice is sometimes used to slow down brute-force attacks, and matching a double-hash against a stored value can confirm a message is intact without exposing the original. For password storage, dedicated algorithms like bcrypt or Argon2 are better choices.