Uncompressed JavaScript bytes per character

Uncompressed JavaScript Bytes Per Character is a simple online tool that lets you fetch and process the JSON data from a WebPageTest result, allowing you to analyze the uncompressed JavaScript bytes per character on the page.

This application downloads a WebPageTest JSON result for Chrome tests, looks at the rendered text and returns the number of uncompressed JavaScript bytes per character on the page.

This is intended to be a metric that makes you think about the The Website Obesity Crisis, How web bloat impacts users with slow devices and JavaScript Bloat in 2024.

It includes every character on the page, even those which might not be initially visible. It counts uncompressed JavaScript, as that is what the browser has to process.

It was inspired by Paul Calvano's Web Font Analyzer. All the processing happens on your browser.