Checksums & CRC Tools
Compute CRC and checksum values from hex or byte input.
Checksums & CRC Tools
About Checksums & CRC Tools
Checksums and CRCs are error-detection codes computed from a block of data. This category computes checksum and CRC values from hex or byte input — the same kind of check used in file formats and communication protocols to catch corrupted data.
Frequently Asked Questions
What's the difference between a checksum and a CRC?
A simple checksum adds up byte values. CRC (cyclic redundancy check) uses polynomial division, which catches more types of data corruption than a plain sum does.
Where is CRC32 actually used?
ZIP archives and PNG images both embed a CRC32 checksum per chunk to detect corrupted data.