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MD5 Hash Generator

Generate MD5 hashes for checksums and legacy compatibility — runs entirely in your browser.

Runs 100% in your browser — nothing is uploaded

About this tool

The MD5 Hash Generator computes the MD5 message digest of any text input using a pure-JavaScript implementation (spark-md5) that runs entirely in your browser. Enter text and instantly see the 128-bit hash as 32 hexadecimal characters.

Important security note: MD5 is cryptographically broken. Collision attacks are practical (two different inputs can produce the same hash), and preimage attacks against weak inputs are feasible. Do not use MD5 to hash passwords or for any security-sensitive application. Use SHA-256, SHA-512, or bcrypt instead.

MD5 remains widely used for non-security purposes: file integrity checksums (where collision resistance is not the threat model), cache-busting keys in CDN URLs, content fingerprinting, and compatibility with legacy APIs and database schemas that already use MD5. This tool is provided for those legitimate use cases. Web Crypto does not include MD5, which is why this tool uses spark-md5 rather than the native SubtleCrypto API.

Frequently asked questions

Is MD5 safe for passwords?
No. MD5 password hashes can be cracked in seconds using rainbow table attacks. Use bcrypt, scrypt, or Argon2 for passwords. This tool should not be used for password hashing.
Why doesn't Web Crypto support MD5?
The W3C deliberately excluded MD5 and SHA-1 from the Web Crypto API because they are cryptographically broken. The API only includes algorithms that are currently considered safe for security applications.
What is MD5 still used for?
File checksums, database content fingerprinting, cache keys, non-security content identification, and legacy API compatibility. When the goal is to detect accidental data corruption (not malicious tampering), MD5 remains a reasonable choice due to its speed.
Is the same input always the same MD5?
Yes. MD5 is deterministic. The same input always produces the same 32-character hex digest. Whitespace, capitalization, and even a single character difference will produce a completely different hash.

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