YARA Scanner is part of DevStudio — a free, in-browser collection of developer utilities that work without sign-up, installation, or any backend service. Compile YARA rules in-browser via the @virustotal/yara-x WebAssembly engine and scan paste / hex / base64 / file samples — curated reference library included, all running entirely on your device. Because the page never uploads what you paste, you can run sensitive payloads, configuration files, secrets, or production data through it with confidence: nothing leaves your browser tab. Use YARA Scanner for ad-hoc debugging, code review, log triage, release prep, learning a new format, or as a quick scratchpad while you build. If you use this tool a lot, pair it with Log Analyzer, Thread Dump, Browser Heap Analyzer, and the rest of the DevStudio toolkit for related developer workflows.