AddressSanitizer and ThreadSanitizer are tools for finding bugs and vulnerabilities in the Chrome browser and server applications. AddressSanitizer detects buffer overflows and use-after-free errors. ThreadSanitizer detects data races in C++ and Go code. MemorySanitizer detects uninitialized memory reads. The tools use compiler instrumentation and run-time libraries to monitor memory accesses and detect errors. Over 1000 bugs have been found using these tools in Chrome and Google server applications.