micmro/performance-bookmarklet
Performance-Bookmarklet helps to analyze the current page through the Resource Timing API, Navigation Timing API and User-Timing - requests by type, domain, load times, marks and more. Sort of a light live WebPageTest.
Highlights Parts of the Page Where Specific WebFonts are Used
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Latest capture 2026-10-20 09:42
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Performance-Bookmarklet helps to analyze the current page through the Resource Timing API, Navigation Timing API and User-Timing - requests by type, domain, load times, marks and more. Sort of a light live WebPageTest.
A lightweight, easy to use Javascript <span> injector for radical Web Typography
Automatic font fallback based on font metrics
A CSS bookmarklet that puts pink error boxes (with messages in comic sans) everywhere you write bad HTML.
Front-end performance heatmap bookmarklet.
Open-source webfont service