USB, Storage and Port Tests
Measure USB, SD card and SSD speed, catch fake flash drives, and test Bluetooth, MIDI and serial devices.
Storage speed
USB Speed Test
Measure a flash drive's real read and write speed and catch ports stuck at USB 2.0.
SSD Speed Test
Measure SSD and hard drive read, write and small file speed in your browser.
SD Card Speed Test
Measure an SD or microSD card's real speed and check it against V30, U3 and other classes.
Fake USB Test
Fill and verify a flash drive or memory card to expose fake capacity.
Device connections
MIDI Tester
See and hear every note, knob and pedal your MIDI keyboard or controller sends.
Bluetooth Test
Check your Bluetooth adapter and read a device's battery, details and connection speed.
Serial Monitor Online
Read and send serial data in your browser, with hex view, DTR and RTS control and a loopback test.
Drive and card speed
Pick a folder on any drive and the usb speed test writes and reads test files to measure real speed, then removes them. The sd card speed test explains speed classes such as U3, V30 and A2, and the ssd speed test covers internal drives. If a cheap flash drive claims a huge size, the fake usb test checks how much it really stores.
Bluetooth, MIDI and serial
The bluetooth test finds nearby Bluetooth Low Energy devices and reads their battery and details. Musicians can watch every note and control message with the midi tester, and makers can talk to Arduino and ESP32 boards with the serial monitor online.
When a device is not recognized
The usb device not recognized guide fixes the Windows message about a malfunctioning USB device, and bluetooth not working covers adapters and pairing.