HoodChecker (or sometimes Hood Checker) is a standalone program developed by Mootilda for checking neighborhood files in The Sims 2 for unusual or corrupted references. HoodChecker can often detect missing character files, memory errors, issues with wants and fears, or other anomalies that can sometimes indicate neighborhood corruption. HoodChecker can also remove or fix many of the issues it detects. For issues that HoodChecker cannot correct itself, the program provides information on which specific references are unusual or corrupt, which allows players to use SimPE or other programs or mods to correct them if they choose to.
HoodChecker is a well-known program in the Sims 2 community, and is often suggested as a first measure for detecting suspected corruption issues.