How to generate an MD5 hash online

Many older systems — content-delivery networks, legacy APIs, database integrity checks, and ETag headers — still use MD5 as a fast, non-cryptographic checksum. While MD5 is not safe for password hashing or digital signatures, it is perfectly appropriate for these checksum use cases. This guide shows how to generate an MD5 hash of any string in seconds without installing software.

Step-by-step guide

1. Paste your string: Enter the text you want to hash — an API key, a file path, a record ID, or any string your system uses as input to an MD5 checksum.
2. Select MD5: Choose 'md5' from the algorithm selector. Keep 'hex' encoding unless your target system expects base64.
3. Copy the 32-character digest: MD5 always produces a 32-character hex digest (128-bit output). Copy it and paste it where your system expects the checksum. Check the input byte length shown — a mismatch there explains most checksum failures.

Frequently asked questions

Is MD5 safe for passwords?

No. MD5 is intentionally fast, which makes it easy for attackers to brute-force billions of guesses per second. Use bcrypt, Argon2, or scrypt for password storage.

Why does MD5 produce different results in different tools?

Character encoding differences are the most common cause. This tool always encodes input as UTF-8. If another tool uses Latin-1 or adds a byte-order mark, the bytes differ and so does the hash.