MD5 produces a 128-bit (32 hex character) hash. Cryptographically broken since 2004 - DON'T use for passwords or signatures - but still fine for non-security uses: file integrity checks, cache keys, deduplication, content-addressed storage. Paste text or drop a file (file hashing happens locally, the file is never uploaded).
When to use this
Use for: verifying a downloaded file matches a published MD5 checksum, generating cache keys from request URLs, deduplicating uploaded files (same content = same MD5), generating content-addressed storage paths, debugging legacy systems that still use MD5.
Frequently Asked Questions
Is MD5 secure?
No - MD5 has been cryptographically broken since 2004. Collision attacks are practical (Flame malware used one in 2012). Don't use MD5 for passwords, signatures, certificates, or anything security-sensitive. For non-security uses (file checksums, cache keys) it's still fine.
What should I use instead for security?
SHA-256 for general security (file integrity in security context, digital signatures), Argon2 / bcrypt / scrypt for passwords (MD5 is laughably weak for passwords - a GPU cracks billions per second).
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