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Page Size & Request Analyzer

See the total weight and request count of any page by dropping in a HAR file exported from your browser. Get a full breakdown by file type, first vs third party, and the largest assets. The file is parsed in your browser and never uploaded.

Drop a HAR file here or . Nothing is uploaded.
How to export a HAR file
  1. Open the page you want to measure in Chrome, Edge, or Firefox.
  2. Open DevTools (F12 or right click then Inspect) and go to the Network tab.
  3. Tick Preserve log, then reload the page so every request is captured.
  4. Click the download / Export HAR icon and save the file.
  5. Drop that file above. A HAR can contain cookies and headers, so only share files from sites you trust. This tool keeps it on your device.
Why a HAR file. Your browser already measured every byte and request when it loaded the page, so the numbers here are exact rather than estimated. A live URL checker would have to fetch the site on a server, which we avoid for speed and privacy. The HAR is read in your browser and never leaves your device.

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