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⊕ XOR / BCC Checksum Calculator

Compute XOR/BCC and Sum8/Sum16-BE/LE checksums with text/hex/Base64 input, configurable init value, byte range, step-by-step trace, verification and batch mode

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

Input mode

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

0 bytes recognized

XOR Init Value

Applies to XOR/BCC only; Sum algorithms are unaffected.

Leave empty to use all bytes. Indices are 0-based.

Output Format

Results (click to copy)

XOR / BCC (8-bit)
—
Sum8
—
Sum16-BE (big-endian pairs)
—
Sum16-LE (little-endian pairs)
—
🔍 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)
📋 Batch mode (one group per line)

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