🔢 CRC Calculator

CRC and checksum workbench for CRC-8/16/32/64, XOR/BCC, Sum8/Sum16, and LRC.

All computation runs locally in your browser. Input data is not uploaded by the tool.

Checksum type

CRC XOR / Sum LRC

Input mode

Text HEX Base64

HEX accepts "48 65", "0x48,0x65", "\x48", newlines and # / // line comments

0 bytes recognized

XOR init value

0x00 0xFF Custom

Start byte (optional)

End byte (exclusive, optional)

Output format

Add 0x prefix

XOR / Sum results (click to copy)

XOR / BCC (8-bit)

—

Sum8

—

Sum16-BE

—

Sum16-LE

—

Step-by-step trace (XOR)

#	Byte	Acc (before)	Acc (after)

After you enter valid bytes, each XOR step will appear here.

Verify against expected (optional)

Algorithm

Expected (hex or dec)

Batch mode (one group per line)

Input mode

Text HEX Base64

HEX accepts "48 65", "0x48,0x65", "\x48", newlines and # / // line comments

0 bytes recognized

Start byte (optional)

End byte (exclusive, optional)

Output format

Add 0x prefix

LRC results (click to copy)

LRC (ISO 1155)

—

Raw Sum8 (intermediate)

—

Step-by-step trace (LRC)

#	Byte	Sum (before)	Sum (after)

After you enter valid bytes, each accumulation step will appear here.

Verify against expected (optional)

Expected LRC (hex or dec)

Batch mode (one group per line)

Online CRC and checksum workbench supporting CRC-8, CRC-16, CRC-32, CRC-64, XOR/BCC, Sum8/Sum16, and LRC. Accepts text, hexadecimal, Base64, and file input, with custom CRC parameters, byte ranges, step-by-step traces, verification, and batch mode. All processing runs locally in your browser.

🔢 CRC Calculator

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