DeviceOK
SearchCheck my device
Home / Device types / POS Terminal & Peripherals
POS Terminal & Peripherals diagnostics

Test what the browser can see. Know when it cannot.

Test keyboard-like scanners, compatible HID devices, receipt/label output and browser connectivity before changing POS software or replacing peripherals.

Run these first

Relevant live checks

Keyboard TestPress keys and verify that the browser receives the expected keyboard events.
→
WebHID Device TestRequest a compatible HID device in browsers that support WebHID and display its browser-exposed product and vendor identifiers.
→
4×6 Shipping Label Print TestPrint a 4×6-style reference label to inspect thermal/label sizing, clipping, barcode sharpness, and scaling.
→
Browser Online Status TestCheck the browser online state, available connection hints, and a short round trip to DeviceOK.
→
First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Test each peripheral independently

  2. 2

    Separate network/POS app issues from input/output hardware

  3. 3

    Use payment vendor support for secure card-reader errors

What DeviceOK/browser can help check
  • Observe keyboard-wedge scanner input
  • Access compatible HID devices with permission
  • Generate print references and test web connectivity
What this browser page cannot prove
  • Diagnose payment-card reader security modules
  • Bypass certified payment software
  • Inspect proprietary POS firmware