Third-Party Script Checker
Every external script is a speed cost and a privacy decision. See what a page loads from other domains.
GO DEEPERWhat do you want to uncover next?
What this tool checks
- External hosts grouped by category
- Analytics, advertising, social, chat, payment and CDN resources
- Render-blocking scripts in the head
- Privacy and consent implications
How to read the result
A lighter third-party footprint usually loads faster. Analytics and advertising hosts often require cookie consent under privacy laws such as the GDPR; the tool flags them so you can review.
Terms explained
Frequently asked questions
Are third-party scripts bad?
Not necessarily, but each one adds requests and risk. Keep the ones that earn their place and load them with async or defer.
Do I need a cookie banner?
If you use advertising or analytics that set cookies and you have visitors in regions with consent laws, usually yes. This is general information, not legal advice.
What is render-blocking?
A script in the head without async or defer stops the browser from drawing the page until it finishes.