What is Canvas Hashing?

Canvas fingerprinting is a tracking method based on the HTML5 canvas element. When you visit a webpage using this vector, the site instructs your browser to draw a hidden, complex configuration of text and geometric shapes.

Because different operating systems, graphics processors (GPUs), installed system fonts, display drivers, and subpixel rendering layouts process this image slightly differently, the final pixel configuration is unique. When this canvas image is exported and converted to an alphanumeric hash (Canvas Hash), it serves as a highly unique hardware-bound identifier.

How Does User-Agent Tracking Work?

The User-Agent (UA) is a metadata string transmitted by your web browser in the headers of every HTTP request. It communicates details about your browser family, version, operating system, and hardware architecture (such as x86_64 or ARM) to the destination server. While originally designed to help web servers format layouts for specific devices, the UA string can be paired with secondary attributes to isolate and track individual browser sessions.

How Are Browsers Identified Without Cookies?

Unlike HTTP cookies, which are stateful markers stored directly inside your browser storage, browser fingerprinting is completely stateless. By collecting a variety of hardware configurations and system preferences—such as screen resolution, color depth, timezone offset, CPU core count, device RAM estimate, language lists, and WebGL rendering capabilities—trackers can compile an incredibly specific device profile.

Because the combined entropy of these data points is so high, the compiled browser fingerprint behaves as a persistent, unique device ID. This tracking continues to function even if you disable third-party cookies, clear browser storage, or switch to incognito mode.