Tempo Kit

All-in-one metronome, timer, stopwatch, chromatic tuner, library & video practice tools for YouTube, Bilibili & more

Turn your browser into a focused music practice station. Practice smarter and more efficiently. Tempo Kit keeps your metronome, chromatic tuner, timer, stopwatch, video practice controls, and saved presets in one clean browser side panel, so your practice stays focused without switching apps. Whether you're learning a new solo on YouTube, running timing drills, looping a section, or shredding to local audio files, everything you need docks right next to your work. FREE CORE TOOLS: • Metronome: 30–600 BPM, tap tempo, subdivisions, sound options, and visual flashes. Mini metronome control let you keep the BPM running while using other tabs. • Chromatic Tuner: Real-time pitch detection from your microphone, processed locally in your browser. • Timers & Stopwatch: Run focus blocks of different subjects, repeated a section, laps, and timed practice sessions. • Practice Library: Save up to 3 presets, keep notes, and export/import your library backup. PRO FEATURES (Tempo Kit Pro): Unlock the full video practice workflow and a larger practice library. • Video Practice Controls: Slow down, transpose, loop, and analyze from the side panel. Mini video control let you change speed and transpose while using other tabs. • Speed Control: Adjust playback from 0.1x to 3x without changing pitch. • Transpose: Shift pitch from -12 to +12 semitones without changing speed. • A-B Loops: Isolate difficult sections and repeat them until they feel clean. • BPM Detection: Automatically detect the tempo of the connected video or audio. • Expanded Library: Save 300+ presets, organize folders, keep notes, and save video practice profiles. Tempo Kit works with YouTube and Bilibili out of the box. You can also practice with local audio or video files in the Tempo Kit Practice Player. Other standard media and audio players may work when the site and browser allow extension control. LOCAL-FIRST & PRIVATE: Tempo Kit is built to be fast and private. The metronome, tuner, timer, stopwatch, and BPM analysis run entirely locally on your device. We do not use analytics, tracking cookies, or advertising. Your practice library stays in your browser's local storage. Payments are handled securely by ExtensionPay and Stripe.