Checksum Calculator
Multiple checksum algorithms including sum, XOR, Fletcher, Adler, and more.
Configuration
Input Data
Usage
Supported Algorithms
Sum (Sum8/16/32): simple accumulation truncated to low N bits; XOR (XOR8): all bytes XORed; Fletcher family: checksums based on addition and modular arithmetic; Adler-32: the algorithm used by Zlib, faster than Fletcher-32.
Input Format
Supports both text and hex input. Text is encoded to bytes via UTF-8; hex must be of even length and contain only 0-9, a-f, A-F characters.
Use Cases
Checksums are used for data integrity checks to detect accidental errors during transmission or storage. Note: checksums cannot detect intentional tampering; for security use HMAC or hash algorithms.