Online AprilTag detector

Detect AprilTags in your browser, with nothing to install. Point your phone or webcam at some tags to see their IDs and outlines live, or upload a photo to find every tag in it.

• Supports the tag36h11, tag25h9, tag16h5, tagStandard41h12, tagStandard52h13, tagCircle21h7, tagCircle49h12 and tagCustom48h12 families.
• Pause to freeze a frame, or switch family to re-check it.
• Collect mode gathers every tag ID seen while you move the camera.
• Optional warnings when the same tag ID appears twice.

Everything runs on your device: camera video and images are never uploaded. Detection uses the AprilRobotics AprilTag library compiled to WebAssembly.

Free and open source on GitHub. Read about how it was built.