SHA-256 vs MD5

SHA-256 provides collision-resistant cryptographic integrity for software releases, TLS, and HMACs, whereas MD5 collisions can be generated in seconds.

SHA-256

FIPS 180-4 256-bit cryptographic hash function resistant to collision and second-preimage attacks.

Visit SHA-256

MD5

Legacy 128-bit digest (RFC 1321) broken against collision attacks and suitable only for non-adversarial legacy checksums.

Visit MD5

Feature Comparison

FeatureSHA-256MD5SHA-256, HMAC, AES-GCM & Bcrypt Studio
Digest length256 bits (64 hex chars)128 bits (32 hex chars)Compute SHA-256/384/512
Collision securityCryptographically secureBroken (trivial collisions)Constant-time hash compare
Password storageToo fast alone (use Bcrypt)Unsafe for passwordsBuilt-in Bcrypt verifier

Verdict

Always choose SHA-256 (or SHA-512) for file checksums, API HMAC signatures, and integrity manifests; never use MD5 for security, certificates, or passwords.

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Frequently Asked Questions

What is the difference between SHA-256 and MD5?

SHA-256 provides collision-resistant cryptographic integrity for software releases, TLS, and HMACs, whereas MD5 collisions can be generated in seconds. On the points that matter most: Digest length — SHA-256: 256 bits (64 hex chars); MD5: 128 bits (32 hex chars). Collision security — SHA-256: Cryptographically secure; MD5: Broken (trivial collisions). Password storage — SHA-256: Too fast alone (use Bcrypt); MD5: Unsafe for passwords.

Is SHA-256 better than MD5?

Always choose SHA-256 (or SHA-512) for file checksums, API HMAC signatures, and integrity manifests; never use MD5 for security, certificates, or passwords. If you mainly need the core feature without a subscription or signup, SHA-256, HMAC, AES-GCM & Bcrypt Studio is a free alternative to both.

Is there a free alternative to both SHA-256 and MD5?

Yes — our SHA-256, HMAC, AES-GCM & Bcrypt Studio is completely free with no account required.

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