Webpack Bundle Size Analyzer

JSON →
library 3.1.0 ·javascript maintenance
verified May 27, 2026

A CLI tool and webpack plugin that analyzes webpack's JSON output to display a tree of packages included in the bundle, sorted by size contribution. Version 3.1.0 is the latest stable release with no recent updates. It helps identify which dependencies are bloating the bundle. Unlike webpack-bundle-analyzer, it provides a plain text tree view rather than an interactive visualizer, and works with webpack 1–3 only. It supports two usage modes: piping webpack --json output to the CLI or adding a plugin to write a report file. Note: sizes are reported before minification/uglification.

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