Cryptographic Hash Generator

About the Cryptographic Hash Generator

Type or paste text and get its MD5, SHA-1, SHA-256 and SHA-512 digests at once, updated as you type. Turn on HMAC mode to compute keyed hashes with a secret key, and use Uppercase Outputs for upper-case hex.

Text is converted to UTF-8 bytes before hashing, so the digests match what command-line tools produce for the same bytes. This tool hashes text you enter, not files.

How to use it

1. Type or paste the text to hash.
2. Read the MD5, SHA-1, SHA-256 and SHA-512 digests, which update as you type.
3. Turn on HMAC Mode and enter a key for keyed hashes, then copy the digest you need.

Worked example

Digests of the five characters hello, with no trailing newline.

hello

MD5     5d41402abc4b2a76b9719d911017c592
SHA-1   aaf4c61ddcc5e8a2dabede0f3b482cd9aea9434d
SHA-256 2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824

Common mistakes and gotchas

• A trailing newline changes the hash completely. echo hello | sha256sum hashes 6 bytes (with the newline); the text hello in this tool is 5 bytes.
• MD5 and SHA-1 are broken for security purposes because collisions can be constructed. They remain fine for checksums and cache keys, but use SHA-256 or SHA-512 where integrity matters.
• A plain hash is not a safe way to store passwords. Use a purpose-built, salted, deliberately slow password hashing function on your server.
• A hash cannot be reversed or decrypted. Short or common inputs can still be guessed by hashing candidates.

Frequently asked questions