Fletcher's Checksum Tools

This tool provides one of the few implementations of Flecher's checksum that actually follow the standard.

Fletcher checksums are very lightweight checksums that can be used for error detection or single bit changes in situations where performance is key.

Contrary to MD5 or SHA hashing, Fletcher 's checksum can be effectively used on very tight computational budgets at the cost of slightly increased collision risk.

For example, you can use it to detect if a big texture has changed every frame, or detect changes in an AR point cloud even faster, all without breaking a VR headset's limited CPU budget.