What Is a Bundle Analyzer?

A bundle analyzer is a tool that inspects a compiled build and renders a breakdown, often a treemap, of how much each module and dependency contributes to total size. It makes large or duplicated packages obvious at a glance. Teams use it to decide what to trim, lazy-load, or replace.

Why it matters

Without a visual breakdown, a single oversized dependency can quietly bloat a bundle. Running an analyzer, or a size check derived from it, in CI keeps bundle growth visible per change.

Related guides