Detecting adblock, without JavaScript, by abusing HTTP 103 responses

In plain words

This project demonstrates a technique for detecting ad blockers using HTTP 103 Early Hints responses instead of JavaScript. It works by sending early hints that ad blockers would intercept, allowing servers to identify when blocking software is active. The method operates without requiring client-side JavaScript code, offering an alternative approach to traditional ad blocker detection mechanisms.

written from the facts on this page · September 2026

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