MD5 vs SHA-256: Full Comparison
MD5 and SHA-256 are both cryptographic hash functions that convert data into fixed-length digests. MD5 produces a 128-bit (32-character) hash and is fast but cryptographically broken. SHA-256 produces a 256-bit (64-character) hash and remains secure for all modern applications.
| Feature | MD5 | SHA-256 |
|---|---|---|
| Output Length | 128 bits (32 hex chars) | 256 bits (64 hex chars) |
| Speed | Very fast | Slower (but still fast) |
| Security | Broken — collision attacks exist | Secure — no known attacks |
| Use Cases | Checksums, deduplication, legacy | Digital signatures, SSL, blockchain |
| Collision Resistance | Weak — collisions found in 2004 | Strong — 2^128 operations needed |
| Standards | Deprecated for security use | NIST standard, widely recommended |
| File Verification | Still used for quick checksums | Recommended for security-critical |
| Password Hashing | Never use for passwords | Better, but use bcrypt/Argon2 instead |
Verdict: Which Should You Use?
Use SHA-256 for anything security-related — file integrity, digital signatures, and data verification. MD5 is only appropriate for non-security checksums and legacy compatibility. Generate both with Quill Tools' free hash generators.
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MD5 Hash Generator
Generate MD5 hash digests from text or files online for free. Useful for checksums, data integrity verification, and legacy systems. No signup required.
SHA-256 Hash Generator
Generate SHA-256 cryptographic hashes from text or files online for free. Industry-standard hashing for security and data integrity. No signup required.