Browser-only tool
MD5 hash generator
MD5 is still encountered in legacy checksums and old integrations, but it is broken for collision resistance. Use this page for compatibility, not for security.
Warning: MD5 is legacy-only. Use it for old checksums and compatibility, not for signatures, passwords, certificates, or tamper-proof integrity.
MD5 Is Legacy Only
This canonical page intentionally leads with the security warning. MD5 can still be useful for matching old checksums, but new systems should use SHA-256, SHA-512, BLAKE2, or BLAKE3 depending on ecosystem support.
The calculator above is intentionally labeled as legacy-only so users do not mistake MD5 for a safe modern choice.
Useful for:
- Comparing legacy checksums when an old system already requires MD5.
- Reproducing old API, catalog, or file verification values.
Do not use for:
- Password storage.
- Digital signatures.
- Certificates.
- Security-sensitive tamper detection.
Safer alternatives:
- SHA-256 or SHA-512 for modern integrity checks.
- Argon2id, bcrypt, or scrypt for password storage.
Privacy And Limitations
MD5 is computed locally in your browser on this static page. Input is not uploaded.
- MD5 is cryptographically broken and should not be used for signatures, certificates, password storage, or tamper-proof integrity.
- Use SHA-256 or SHA-512 for general integrity checks unless a legacy system specifically requires MD5.
- MD5 hashes can be searched in public rainbow tables for common inputs.
Related Pages
FAQ
Is MD5 secure?
No. MD5 has practical collision attacks and is not safe for security-sensitive use.
Why keep an MD5 tool at all?
Some legacy systems, file catalogs, and old APIs still expose MD5 checksums. A tool can help with compatibility while clearly warning about limitations.
When is MD5 still acceptable?
MD5 can be acceptable for legacy compatibility checks where cryptographic security is not required and both sides already depend on MD5.
What should replace MD5 for new systems?
For modern integrity checks, prefer SHA-256 or SHA-512. For password storage, use Argon2id, bcrypt, or scrypt.
Can two different files share the same MD5?
Yes. Collision attacks make this practical, which is exactly why MD5 should not be trusted for tamper resistance or security decisions.