Build Inspector
Upload or paste a Vite manifest, webpack stats, Next.js build manifest or file list to see sizes, source maps and unhashed files, and compare two builds.
About this tool
Paste or open the output of a build: a Vite manifest.json, webpack stats from webpack --json, a Next.js build-manifest.json, or lines of size and name. The files are totalled by type, and notes flag large JavaScript, source maps in the output, JS or CSS without a content hash, and the same file twice.
Add a second build to compare file by file, matched by name without the hash. A manifest that carries no sizes shows sizes as unknown rather than guessing. Files over 10 MB are refused and parsing stops after three seconds. Everything stays in your browser.
Auditing package.json, tsconfig and bundler config files is a feature of the DevKit Forge browser extension.