GeraGuard · Tracker Directory
Web Tracker Directory
Most websites embed third-party scripts that watch what you do — for advertising, analytics or session recording. This directory explains the 16 most common web trackers in plain English: who runs them, what they collect, and how to block them. Click any tracker for a full breakdown, or run a site through the free Privacy Scanner to see exactly which trackers it loads.
Advertising
Google Ads / DoubleClick
Advertisingby Google (Alphabet)
Google Ads conversion and DoubleClick remarketing tags track ad clicks and build advertising profiles used across Google’s ad network.
Meta Pixel (Facebook Pixel)
Advertisingby Meta
The Meta Pixel is an advertising tag that reports your activity on a website back to Facebook and Instagram for ad targeting and measurement.
TikTok Pixel
Advertisingby ByteDance
The TikTok Pixel reports website visits and conversions back to TikTok so advertisers can target and retarget users.
LinkedIn Insight Tag
Advertisingby Microsoft (LinkedIn)
The LinkedIn Insight Tag tracks website visitors to enable LinkedIn ad targeting and conversion measurement, especially for B2B marketing.
Microsoft Advertising UET
Advertisingby Microsoft
The Microsoft UET (Universal Event Tracking) tag measures conversions and builds remarketing audiences for ads shown across Bing and the Microsoft network.
Criteo
Advertisingby Criteo
Criteo is a retargeting advertising network whose tag follows shoppers to show them ads for products they previously viewed.
The Trade Desk
Advertisingby The Trade Desk
The Trade Desk is a programmatic advertising platform whose tags and identity tools track users to power real-time ad auctions.
Amazon Advertising
Advertisingby Amazon
Amazon advertising tags track visitors to build audiences and measure conversions across Amazon’s growing ad network.
Analytics
Google Analytics
Analyticsby Google (Alphabet)
Google Analytics is a website analytics service that measures how visitors find and use a site, reporting that activity back to Google.
Adobe Analytics
Analyticsby Adobe
Adobe Analytics (formerly Omniture) is an enterprise web analytics platform used to measure visitor behaviour on large websites.
Segment
Analyticsby Twilio (Segment)
Segment is a customer data platform that collects website events once and forwards them to many other marketing and analytics tools.
Mixpanel
Analyticsby Mixpanel
Mixpanel is a product-analytics tool that tracks individual user events and funnels inside web and mobile apps.
Session replay
Hotjar
Session replayby Hotjar (Contentsquare)
Hotjar is a session-recording and heatmap tool that replays how visitors move, click and scroll on a website.
Microsoft Clarity
Session replayby Microsoft
Microsoft Clarity is a free session-replay and heatmap tool that records user interactions on a website.
FullStory
Session replayby FullStory
FullStory is a digital-experience analytics tool that records and replays complete user sessions on a website or app.
Tag manager
Frequently asked questions
- What is a web tracker?
- A third-party script embedded in a website that collects data about your browsing — page views, clicks, device details and identity — usually for advertising, analytics or session recording. Trackers are rarely needed for a page to function, which is why a privacy extension can block most of them without breaking websites.
- How do I know which trackers a website uses?
- Run any website through the free GeraGuard Privacy Scanner to see the trackers it loads, grouped by category and graded A–F.
- Can blocking trackers break websites?
- For the vast majority of trackers, no. Advertising pixels, session recorders and analytics scripts are not required for a page to work. GeraGuard uses filter lists that distinguish functional from purely tracking scripts to minimise breakage.
Keep exploring
- How GeraGuard works
- Check your email for breaches
- Privacy Score quiz
- Compare privacy extensions
- Privacy guides
Part of the Gera Systems family — see also GeraCompliance (GDPR & AI Act), gera.services.