CRC Checksum Calculator
Online CRC (Cyclic Redundancy Check) calculator supporting CRC-8, CRC-16, CRC-32 and more. Accepts text or hex input, displays checksum and algorithm parameters in real time.
Parameters
Input Data
Algorithm Parameters
Usage
CRC Introduction
CRC (Cyclic Redundancy Check) computes a fixed-length checksum from data, widely used to detect errors in data transmission or storage. Different CRC variants are distinguished by polynomial (Poly), initial value (Init), XOR-out (XorOut), and reflection (RefIn/RefOut) parameters.
Steps
1. Select a CRC variant (CRC-8/16/32); 2. Choose input format (text or hex); 3. Enter data in the input area; 4. View the result in real time (hex format); 5. Algorithm parameter area shows the current variant's configuration; 6. Click 'Copy' to copy the result.
Parameter Description
Polynomial (Poly): the generator polynomial used in CRC computation, determines error-detection capability; Initial Value (Init): starting value of the CRC register, affects the result; XOR Out (XorOut): final CRC value is XORed with XorOut for output transformation; Reflect In (RefIn): reverses the bits of each input byte, different standards use different conventions.