Hardware Tools & Calculators

keyboard Keyboard Tester Press any key and see it register instantly — key name, code, and a running log. Find dead, sticky or double-typing keys in seconds. Checkchevron_right mic Microphone Test Check your mic in seconds: allow access and watch the live level meter and waveform respond to your voice. Nothing is recorded or sent. Runchevron_right graphic_eq Online Voice Recorder Record audio in your browser and download it as a file — no installation, no sign-up, and the recording never leaves your device. Runchevron_right gradient Dead Pixel Test Cycle full-screen solid colors — red, green, blue, white, black — and spot dead or stuck pixels on any monitor, laptop, phone or TV. Runchevron_right monitor What Is My Screen Resolution? See your screen resolution, browser window size, pixel density, color depth and touch support instantly — with one-click copy. Runchevron_right tune Chromatic Tuner Tune any instrument in your browser: allow microphone access and watch the note, frequency and cent deviation update live as you play. Nothing is recorded or sent. Runchevron_right music_note Online Metronome (Tap Tempo) A free online metronome with sample-accurate timing, adjustable beats per measure, an accented visual pulse, and a tap-tempo button to find any BPM by ear. Runchevron_right waves Online Tone Generator Generate a pure sine, square, sawtooth, or triangle tone at any frequency from 20Hz to 20kHz, with a safe low-volume default and one-click presets for A4, Middle C, and 1kHz test tone. Generatechevron_right screen_record Online Screen Recorder Record your screen, a window, or a browser tab directly in your browser, with optional microphone audio — no software install, nothing uploaded. Runchevron_right