Pino Logging High-performance JSON logger for Node.js. Transports run in worker threads to keep the main event loop free. Produces NDJSON by default with automatic , , , , and fields. When to use: Structured logging in Node.js applications, request-scoped logging with correlation IDs, sensitive data redaction, multi-destination log routing, framework logging integration. When NOT to use: Browser-only logging (pino has limited browser support), simple debugging during development, projects that need human-readable logs by default (pino outputs JSON; use for dev). Package: (v10+) Quick Referenc…