JavaScript Bundle Analyzer

Totals and largest file from your pasted bundle sizes.

Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.

JavaScript Bundle Analyzer

How to use this tool

  1. Enter your values in the fields above.
  2. Press Generate to see the result.
  3. Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.

Worked example

Pasted sizes of 120 KB, 340 KB and 40 KB total 500 KB, with vendor.js largest at 68% of the total.

What this tool does not do / Limits

This tool does NOT read or measure a live site or a real bundle. It only summarises the sizes you paste, so the figures are only as accurate as your pasted data.

Frequently asked questions

Does this analyse my real bundle?

No. Paste sizes from your own build report; this page only adds them up and ranks them.

What counts as large?

That depends on your site and visitors. The tool ranks files so you can see which one dominates the total.

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