MD5 vs SHA-256: which hash should you use
A practical comparison of MD5 and SHA-256 for checksums, security and performance, so you can pick the right hash for real workflows.
MD5 is faster, SHA-256 is safer
MD5 is still useful when you need a quick checksum or a lightweight fingerprint for non-sensitive data. It is fast and widely supported, which makes it convenient for simple integrity checks and internal comparisons.
SHA-256 is the better choice when security matters. It is much harder to attack in practice, so it fits password-related workflows, trusted verification and any case where you do not want a weak hash to become a risk.
Choose the hash based on the job, not the name
If you only need to confirm that two files or strings match, MD5 can be enough for low-risk checksum work. If the hash may be exposed, stored for later use or compared in a security-sensitive flow, SHA-256 is the safer default.
Performance matters, but usually less than the use case. MD5 is lighter and can be convenient for high-volume checks, while SHA-256 adds more computational cost in exchange for much stronger protection.