MD5 Generator

Generate an MD5 hash of a given string.

Hash settings

Rounds

1

Change your passwords periodically.

2

Never use the same password on multiple sensitive accounts.

3

Use a password with at least 16 characters. It should contain lowercase letters, uppercase letters, numbers, and symbols.

4

Refrain from saving your password in a web browser (Firefox, Chrome, Internet Explorer, Safari). Instead, use a tool which manages an encrypted password locker.

5

Do not log into sensitive accounts while connected to a public Wi-Fi hotspot.

6

Check that you are using a secure (HTTPS, SSH, SFTP) connection before transmitting your password over the web.

What is MD5?

MD5 (Message Digest Algorithm 5) is a widely used hashing function that turns any input string into a fixed-length, 32-character hexadecimal checksum. The same input always produces the same MD5 output, which makes it useful for verifying file integrity, generating cache keys, or checking whether two pieces of data are identical, but MD5 is not considered secure for hashing passwords, since it's fast to brute-force and vulnerable to collisions.

How to use this tool

Enter a string in the input field, pick how many rounds to apply, and click Generate MD5. Each round re-hashes the previous MD5 output, which is occasionally used to add a small extra layer of obscurity (though it does not make MD5 cryptographically secure). Copy the result with the clipboard icon next to the output field.

Common use cases

Verifying a downloaded file's integrity by comparing its published MD5 checksum against a hash of the file's contents.
Generating a short, deterministic cache key or lookup key from a longer input string.
Checking whether two large text blocks are identical without comparing them character by character.
Reproducing legacy system behavior that still relies on MD5 for non-security identifiers.

Frequently asked questions

Is MD5 safe for hashing passwords?

No. MD5 is fast to compute, which is exactly the wrong property for password hashing: modern hardware can attempt billions of MD5 guesses per second. Use our Bcrypt Hash Generator for anything involving passwords.

Why does MD5 always produce a 32-character output?

MD5 always outputs a 128-bit digest, shown as 32 hexadecimal characters, regardless of how long or short the input string is. That fixed length is what makes it useful as a checksum or lookup key.

Can two different inputs produce the same MD5 hash?

Yes, this is called a collision. MD5 collisions have been practically demonstrated since 2004, which is the main reason it's no longer trusted for security-sensitive uses like digital signatures, even though it's still fine for basic integrity checks or cache keys.

What's the difference between MD5 and SHA-1?

Both are legacy hashing algorithms with known weaknesses, but SHA-1 produces a longer 160-bit digest and is somewhat more collision-resistant than MD5. Neither is recommended for new security-critical work; try our SHA Generator to compare the two directly.