Checksum Calculator

Compute common lightweight checksums for frames and payloads: XOR, SUM, and LRC. Input can be HEX bytes or text (UTF-8). Everything runs locally in your browser.

Input

Result

Checksum (hex) —
Checksum (dec) —
Bytes (BE) —
Bytes (LE) —
Notes:
  • XOR: XOR of all bytes.
  • SUM: Sum of all bytes, then masked to N bits.
  • LRC: Two's complement of SUM(8-bit): LRC = (-SUM) & 0xFF.

FAQ

What is the difference between checksum and CRC?

Checksums are lightweight arithmetic methods, while CRC uses polynomial division with stronger error detection.

When should I use XOR checksum?

XOR is simple and fast for basic integrity checks, but less robust than CRC for noisy channels.

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