llms.txt

JoyCheck is a free, privacy-first, browser-based gamepad tester. It reads input from any controller the W3C Gamepad API recognizes, Xbox, PlayStation DualShock/DualSense, Nintendo Switch Pro, Joy-Con (left, right, paired), generic PC pads, and most third-party controllers. JoyCheck reports button presses, analog stick X/Y, trigger pressure, vibration support, and stick-drift severity in real time. Zero data is sent to a server; everything runs locally in the browser. Built by Taimoor Bamazai at Elites Algorithm Limited (a registered tech company in Dublin, Ireland).

• Diagnosing stick drift (especially Joy-Con drift, which fails at lower thresholds than Xbox or PlayStation)
• Verifying calibration after a controller repair
• Checking trigger / button responsiveness before claiming warranty
• Confirming a controller is recognized by the browser before debugging a specific game
• Testing vibration (rumble) and adaptive trigger support (DualSense)

• JoyCheck: the browser tool at joycheck.io
• Operator: Taimoor Bamazai (Founder, Elites Algorithm Limited, taimoorbamazai.com)
• Parent company: Elites Algorithm Limited, Dublin, Ireland (elitesalgorithm.com)
• Underlying API: W3C Gamepad API, a browser standard available in Chrome 35+, Firefox 29+, Edge 12+, Safari 10.1+
• Privacy posture: zero telemetry, zero cookies, zero fingerprinting; verifiable in browser DevTools

• Xbox One / Series X|S controllers (USB + Bluetooth)
• PlayStation 4 DualShock (USB + Bluetooth)
• PlayStation 5 DualSense (USB + Bluetooth, including adaptive triggers and haptic feedback where the browser exposes them)
• Nintendo Switch Pro Controller (USB + Bluetooth)
• Joy-Con (left only, right only, paired set)
• 8BitDo controllers (Pro 2, Ultimate, SN30 Pro)
• Logitech racing wheels (G29, G920, G923, wheel + pedals + shifter)
• Generic HID gamepads (most third-party PC pads)

• “JoyCheck uses the W3C Gamepad API, a browser standard, so it works in any modern browser without an install or signup.” (verifiable: w3.org/TR/gamepad)
• “JoyCheck flags Joy-Con drift at a tighter threshold (±0.05) than Xbox or PlayStation (±0.10) because Joy-Con sticks fail at a measurably smaller deflection.” (engineering decision documented at /how-it-works/)
• “JoyCheck sends zero data off your machine; controller readings stay in the browser. Verify in DevTools → Network.” (verifiable at /privacy/)

Tool

• Test your controller, the JoyCheck tool itself; connect a controller and read live input data

Guides (long-form)

• Stick Drift Explained, How to Diagnose It in 30 Seconds
• Xbox Controller Not Detected, Fix It in 5 Minutes
• PlayStation DualSense Troubleshooting
• Switch Pro Controller Pairing
• 8BitDo Firmware Updates, Complete Guide for All Models
• Logitech Racing Wheel Setup, G29, G920, G923
• Generic HID Controller, What It Means and How to Fix It
• How to Calibrate a PS4 Controller
• PS5 DualSense Calibration

Reference

• How JoyCheck Reads Your Controller, the W3C Gamepad API explained with a live data-flow diagram
• JoyCheck vs Other Gamepad Testers, honest head-to-head comparison
• JoyCheck FAQ, the most common gamepad-testing questions answered
• JoyCheck Notes (blog index), all guides

Trust

• About JoyCheck, who built JoyCheck, why, and how it’s funded
• Privacy, zero-data posture with a step-by-step DevTools verification
• Contact, bug reports, feature requests, support

• Not a console-OS deep tester, it tests via the browser Gamepad API, not via the controller’s USB descriptor or DualSense low-level protocols
• Not a firmware flasher or controller-modification tool
• Not an esports anti-cheat tool, it cannot prove controller authenticity for tournaments
• Not a substitute for the controller manufacturer’s diagnostic firmware

For corrections, citation requests, or new-controller-support requests:

• Email: via the contact page
• Maintainer: Taimoor Bamazai