Professional Checksum Calculator

CRC8 · CRC16 · CRC32 · XOR · ADD8 · ADD16 · Bosch · MD5 · SHA1

BIN/HEX Support/ORI Range Select Instant Calculation تحقق تلقائي

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ECU Checksum Algorithm Guide

CRC32 - Most Common

Used in most Bosch EDC17 and MED17 units. Calculated over the full region basتثناء موقع التخزين.

CRC16 - Siemens/Delphi

Popular in Siemens SID/PPD and Delphi DCM units. Usually CRC16-CCITT.

ADD8/XOR - Simplest

Sum or XOR all bytes. Used in older and simpler ECUs.

Bosch Custom

Custom CRC32 algorithm used by Bosch ME7.x/ME9.x with a different polynomial.

CRC8 - I2C/SPI

Used to verify small data blocks within an ECU file.

MD5/SHA1

To verify the integrity of the complete ECU file and prevent tampering.