CRC-32 online checksum calculator

Create your hashes online

With this online converter you can upload a file and calculate the CRC-32 checksum to verify your data. You can also enter data manually and convert it to a CRC-32 hash. By using the HMAC field you can increase the security of your data with a shared key.

crc32 converter

CRC-32 converter
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Optional settings
  • Shared secret key used for the HMAC variant (optional):
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The CRC-32 cipher is a non-secure hashing method basically to detect accidental changes of data. More information can be found here: A Painless Guide to CRC Error Detection Algorithms. It's basically used on ethernet, compared to the CRC32B online calculator

The input string encoding is expected to be in UTF-8. Different encoding will result in different hash values. Unicode is considered best practices.