For principle, applications of CRC, please visit The Ultimate Guide to Cyclic Redundancy Check.
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A Cyclic Redundancy Check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data. It works by treating the message as a large binary number and dividing it by a fixed binary number, the "polynomial". The remainder of this division is the CRC checksum.
Visualizing the Process
The animation below simplifies the process of binary long division, which is the core of CRC calculation. You can step through the process to see how the remainder (the CRC value) is generated. This is a conceptual model; actual implementations are highly optimized in hardware and software.
Explore common CRC algorithms. Click on any row to load its parameters into the calculator.
| Name | Width | Polynomial | Initial Value | Reflect In | Reflect Out | Final XOR |
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