About CRC32
CRC32 (Cyclic Redundancy Check) is a 32-bit checksum used to detect accidental data corruption. It is not a security algorithm and should not be used for passwords or digital signatures.
What this tool does
- •Computes CRC32 from text (UTF-8) in your browser
- •Outputs as 8-digit hex or decimal
- •Lets you copy the result in one click
Common use cases
- •Compare data and validate integrity in pipelines
- •Quick checksums for strings/files (comparison)
- •Development and debugging integrations
Important notes
Results can differ across tools if they use a different encoding (UTF-8 vs Latin-1) or a different CRC32 variant. This page uses UTF-8 and the standard CRC32 polynomial (0xEDB88320).
Test vector (standard CRC-32)
For the ASCII string "123456789", the standard CRC32 (CRC-32/IEEE) should be CBF43926 in hexadecimal (8 digits). Use this to compare against other calculators.