Legacy
MD5 Algorithm
Learn about the MD5 hash function: how it works, its vulnerabilities, and when to use it.
Hash Algorithm Guides
Learn about different hash algorithms, their security properties, and best use cases. Each guide includes a preset link to try the algorithm in our calculator.
Legacy
SHA-1 Algorithm
Understand SHA-1: its structure, security issues, and deprecation in favor of SHA-2.
SHA-2 Family
SHA-256 Algorithm
Deep dive into SHA-256: the industry standard for secure hashing and blockchain technology.
SHA-2 Family
SHA-512 Algorithm
Explore SHA-512: maximum security with 512-bit hashes for high-assurance applications.
SHA-3 Family
SHA-3 Algorithm Family
Discover SHA-3 (Keccak): the newest NIST standard with sponge construction and four output variants.
Modern Fast
BLAKE Algorithm Family
Explore BLAKE2 and BLAKE3: the fastest secure hash algorithms optimized for modern CPUs.
Checksum
CRC32 Checksum
Understand CRC32 checksums, polynomial behavior, and when to use it for accidental error detection.
Checksum
CRC32C (Castagnoli) Checksum
Learn why CRC32C is widely used in storage and networking for stronger practical error detection.
Checksum
CRC64 (ECMA) Checksum
Learn about CRC64-ECMA, 64-bit checksums, and custom polynomial configuration for compatibility.
Quick Comparison
| Algorithm | Output Size | Security Level | Status |
|---|---|---|---|
| MD5 | 128 bits | Broken | Legacy |
| SHA-1 | 160 bits | Weak | Deprecated |
| SHA-256 | 256 bits | Secure | Recommended |
| SHA-512 | 512 bits | Secure | Recommended |
| SHA3-256 | 256 bits | Secure | NIST Standard |
| BLAKE3 | 256+ bits | Secure | Fastest |
| CRC32 | 32 bits | Not cryptographic | Checksum only |
| CRC32C | 32 bits | Not cryptographic | Checksum only |
| CRC64 (ECMA) | 64 bits | Not cryptographic | Checksum only |