How to use CRC32
- 1. Type text or drop a file. Files use raw bytes, not UTF-8 reinterpretation.
- 2. Read hex. Eight hex digits.
- 3. Compare. Same CRC is not a cryptographic proof.
- 4. Use SHA for security. CRC detects accidents, not attackers.
About this tool
CRC-32 is what ZIP and PNG use to notice corruption. It is not SHA-256. Generate it here when a protocol or file format asks for CRC, not when you need a security hash.
Polynomial
0xEDB88320 reflected, matching PKZIP/PNG.
Vs Hash tool
Use Hash Generator for SHA-256/MD5/HMAC.
Code examples
Idea
crc32(bytes).toString(16)