Spacebar dead or double-spacing? Test first

Quick diagnosis One slow press can separate a blocked key, chatter and a software-only problem. Photo: Karola G / Pexels 1 / 10

Give the browser keyboard focus

Before testing Open the tester, click the page once, then press Space slowly and deliberately. Photo: Nicola Barts / Pexels 2 / 10

Result: 0 Try another app and an external keyboard before opening the laptop or keycap. Photo: Nicola Barts / Pexels 3 / 10

Result: 2 Dirty or worn contacts can bounce and send a duplicate press to the browser. Photo: Nicola Barts / Pexels 4 / 10

Result: 1 If the app still inserts two spaces, check its settings, input mode and extensions. Photo: Andrea Piacquadio / Pexels 5 / 10

Windows checks Filter Keys can swallow short presses; full-width input can create an unusual space. Photo: Yan Krukau / Pexels 6 / 10

Hardware step Use short air bursts first. Remove a keycap only when its design and service guide allow it. Photo: N Voitkevich / Pexels 7 / 10

Isolation If the external Space works, the laptop key, stabilizer or switch is the likely problem. Photo: energepic.com / Pexels 8 / 10

After each fix A healthy key should add exactly one event repeatedly, without misses or doubles. Photo: Andrea Piacquadio / Pexels 9 / 10

See the count Run the Spacebar Test now, then match 0, 1 or 2 events to the right fix. Photo: Karola G / Pexels 10 / 10 Run the Spacebar Test