
Core Web Vitals: Check Mobile & Desktop
Website performance testing to improve user experience
What it does
Test your website performance using our Chrome extension. Check Core Web Vitals and compare metrics for desktop and mobile devices. Optimize your website performance, improve user experience and achieve SEO goals.
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More dev tools this month
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OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 4d ago · opentrailpaper.com

Lettertrace▲375Track your AI visibility for free (using your own API keys!)
Dev tools · 27d ago · lettertrace.com
Source: Product Hunt launch ↗
Launched alongside, January 2025
the whole month →- IM
Hello! I'm Byran. I spent the past ~6 months engineering a laptop from scratch. It's fully open-source on GH at: https://github.com/Hello9999901/laptop
Dev tools · 2025 · byran.ee
- TITetris in a PDF▲1,289
I realized that the PDF engines of modern desktop browsers (PDFium and PDF.js) support JavaScript with enough I/O primitives to make a basic game like Tetris. It was a bit tricky to find a union of features that work in both engines, but in the end it turns out that showing/hiding annotation "fields" works well to make monochrome pixels, and keyboard input can be achieved by typing in a text input box. All in all it's quite janky but a nice reminder of how general purpose PDF scripting can be. The linked PDF is all ASCII so you can just open it in a text editor, or have a look at…
Life & fun · 2025 · th0mas.nl



Create lifelike, personalized AI avatars from text prompts
AI · 2025 · jogg.ai
