GPU & Graphics Analysis
Discover your GPU, WebGL version, supported extensions, and hardware rendering limits — all in real-time.
WebGL is a JavaScript API for rendering 2D and 3D graphics in your browser. It exposes your GPU model, vendor, and supported extensions — information that contributes to your browser fingerprint and can identify your device with high accuracy.
WebGL (Web Graphics Library) is a cross-platform JavaScript API for rendering high-performance interactive 2D and 3D graphics in any compatible web browser — without the need for plugins. Developed and maintained by the Khronos Group, WebGL is based on OpenGL ES and provides low-level access to your device's GPU (Graphics Processing Unit) through the HTML5 canvas element.
WebGL enables a wide range of applications on the web: from immersive 3D games and scientific visualizations to interactive maps (Google Maps uses WebGL), data dashboards, virtual reality experiences, and CAD tools. Every major browser — Chrome, Firefox, Safari, Edge, and Opera — supports WebGL, making it one of the most widely available graphics APIs on the web.
The API works by communicating directly with your GPU through the browser's graphics pipeline. When a website uses WebGL, it sends shader programs (written in GLSL — GL Shading Language) to your GPU, which executes them in parallel across thousands of cores. This parallel processing capability is what makes WebGL so fast for rendering complex scenes compared to CPU-based canvas drawing.
The most revealing piece of information exposed by WebGL is your GPU renderer string, obtained through the WEBGL_debug_renderer_info extension. This returns two key values:
Unmasked Vendor: The GPU manufacturer (e.g., "NVIDIA Corporation", "Intel Inc.", "Apple"). This identifies the hardware vendor.
Unmasked Renderer: The specific GPU model and sometimes driver version (e.g., "NVIDIA GeForce RTX 4090", "Apple M2 Pro GPU", "Intel Iris Xe Graphics"). This is highly specific and a strong fingerprinting signal.
The hardware limits section reveals your GPU's capabilities: maximum texture size determines the largest single texture dimension your GPU supports (typically 4096, 8192, or 16384 pixels). Maximum vertex attributes and uniform vectors indicate shader complexity limits. These values vary across GPU generations and manufacturers, contributing to device fingerprinting.
The supported extensions list shows additional WebGL capabilities your browser and GPU driver support. Extensions like OES_texture_float , WEBGL_compressed_texture_s3tc , and EXT_color_buffer_float enable advanced rendering features. The exact set of supported extensions is another fingerprinting vector, as it depends on your GPU hardware, driver version, and browser implementation.
WebGL is one of the most powerful browser fingerprinting vectors available. Research from Princeton's WebTransparency project and AmIUnique.org shows that WebGL parameters alone can uniquely identify over 50% of browsers. Combined with canvas fingerprinting and other signals, this number rises above 90%.
Fingerprinting through WebGL works in two ways. Parameter-based fingerprinting collects all the values shown on this page — GPU model, extension list, hardware limits — to create a configuration hash. Rendering-based fingerprinting draws a specific 3D scene and hashes the pixel output, similar to canvas fingerprinting but leveraging 3D rendering differences.
Privacy-focused browsers address this differently: Tor Browser blocks the WEBGL_debug_renderer_info extension entirely, hiding your GPU model. Brave randomizes WebGL rendering output per-session. Firefox with privacy.resistFingerprinting normalizes WebGL parameters. Each approach has trade-offs between privacy and web compatibility.
If you're building graphics-intensive web applications, detecting WebGL capabilities is essential for providing the right experience. Here's how to check WebGL support and query GPU information:
For comprehensive GPU capability testing, also consider using the browser fingerprint checker which combines WebGL data with canvas, audio, and hardware signals for a complete device profile.
WebGL (Web Graphics Library) is a JavaScript API that allows your browser to render interactive 2D and 3D graphics without plugins. It provides direct access to your device's GPU through the HTML5 canvas element, enabling hardware-accelerated rendering for games, visualizations, maps, and other graphics-intensive web applications.
WebGL exposes GPU details through the WEBGL_debug_renderer_info extension, which returns the unmasked vendor and renderer strings. This was designed to help web developers optimize their code for specific hardware. However, this information also makes your device more identifiable for fingerprinting because your exact GPU model and driver version form a relatively unique combination.
WebGL 2 is based on OpenGL ES 3.0 and adds significant capabilities over WebGL 1 (based on OpenGL ES 2.0). Key improvements include 3D textures, transform feedback, instanced rendering, multiple render targets, integer textures, and uniform buffer objects. WebGL 2 is supported in all modern browsers except some older mobile browsers.
Yes. WebGL is one of the most effective fingerprinting vectors. By querying GPU parameters, supported extensions, maximum texture sizes, and rendering a specific 3D scene, websites can create a highly unique device identifier. The combination of your GPU model, driver version, and rendering output is often unique enough to track you across sessions.
In Firefox, you can set webgl.disabled to true in about:config. In Chrome, you can launch with the --disable-webgl flag. Browser extensions like WebGL Fingerprint Defender can randomize WebGL output without fully disabling it. Note that disabling WebGL will break many websites, including Google Maps, games, and 3D visualization tools.
MAX_TEXTURE_SIZE indicates the maximum dimension (in pixels) that your GPU supports for a single texture. Common values are 4096, 8192, or 16384 pixels. Higher values allow for more detailed textures in 3D applications. This value depends on your GPU hardware and driver capabilities.
WebGL is generally safe as browsers implement security measures to prevent direct GPU memory access. However, WebGL can potentially be used for side-channel attacks (like GPU-based timing attacks), fingerprinting, and in rare cases, exploiting GPU driver vulnerabilities. Keeping your browser and GPU drivers updated minimizes security risks.