Private by design
Text, hexadecimal input, and selected files are processed locally in your browser. Calculation input is not uploaded to a CRC calculation server.
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About CRC Calc
CRC Calc is a browser-based toolkit for calculating cyclic redundancy checks, generating lookup tables, producing implementation code, and understanding CRC parameters.
Built for verification
Algorithm pages expose the complete parameter set, standard check value, residue, aliases, and related calculators so results can be reproduced and compared.
Developer tools
Use the calculator, lookup table generator, and generated C, Python, or JavaScript implementation code from one consistent interface.
Growing reference library
The long-term goal is a broad, validated CRC catalogue covering commonly used and specialist algorithms from small CRC widths through CRC-64.