๐งฎ CRC-8/CRC-16 Calculator
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Calculate CRC-8, CRC-16 (CCITT-FALSE), and CRC-16 (MODBUS) checksums of your input text instantly. These are common standards used in embedded device communication protocols and serial data error detection. All calculations run entirely in your browser.
How to use
- Enter the text you want to checksum.
- The CRC-8, CRC-16 (CCITT-FALSE), and CRC-16 (MODBUS) checksums (in hex) are shown automatically.
FAQ
Whatโs the difference between CRC-8 and CRC-16?
The bit width: CRC-8 produces an 8-bit checksum (0x00โ0xFF), while CRC-16 produces a 16-bit checksum (0x0000โ0xFFFF), giving it stronger error-detection capability.
Whatโs the difference between CCITT-FALSE and MODBUS?
Both are CRC-16 variants, but they use different generator polynomials, initial values, and bit-reflection settings. CCITT-FALSE and MODBUS are two well-known variants with different parameters.
How is this different from the existing checksum tool?
This siteโs "Checksum Calculator" tool covers CRC32 and Adler-32, while this tool covers the CRC-8 and CRC-16 family. Use whichever matches your protocol.