Webpack Bundle Analyzer

This tool analyzes webpack bundles using stats.json to reveal how a bundle consumes its size budget. By ingesting a stats.json, it computes per-module sizes, entrypoint breakdowns, and a dependency graph to show where most bytes originate. Conceptually it treats a build as a graph where each node is a module and edges represent imports; the tool aggregates sizes along paths to highlight heavy modules. It supports commonJS and ESM modules, dynamic imports, and code-splitting artifacts. The output helps frontend engineers, performance engineers, and platform teams identify optimization opportunities, such as removing large dependencies, adjusting code-splitting ranges, or replacing heavy libraries. Unique value lies in fast, local-only analysis without needing a cloud service, and in-depth visuals of entrypoint composition and module-level trends. Core features include per-entrypoint sizing, top offenders, a breakdown by package and path, and an exportable report for CI. Common use cases include optimizing a single-page app, auditing vendor bundles across micro-frontends, and validating performance budgets during CI pipelines.