Rapdex — Video Speed Controller for Any Site

Change video speed on any site with shortcuts. Tell it when you need to finish and it works out the speed for you.

Rapdex is a video speed controller that works on any site. Speed up lectures and talks with keyboard shortcuts, and finish in half the time without missing what was said. Choose any speed from 0.07× to 16×. Slow down to study a passage, or speed up a talk you already follow. It works with any HTML5 video or audio player. ━━ WHAT MAKES IT DIFFERENT ━━ ⏱ FINISH BY A SET TIME Tell it when you need to be done. Rapdex works out the speed and applies it. You pick the clock, not the number. ⏸ MISSED A SENTENCE? HOLD SHIFT It drops to 1× and rewinds 3 seconds so you can hear it again. Release and your speed comes back. 📺 LIVE STREAMS Behind on a live stream? It shows how far behind you are and speeds up until you reach the live edge. Then it returns to 1× on its own, without skipping anything. 📖 YOUTUBE CHAPTERS It slows down on code demos and speeds up through introductions, always relative to the speed you chose. 💾 REMEMBERS PER SITE Each site keeps its own speed, so you don't have to set it again in every tab. 📊 TIME YOU GOT BACK A counter shows how many hours you saved. It is kept only in your browser. ━━ SHORTCUTS ━━ D / S — faster and slower R — back to 1× Z / X — rewind and forward 10 seconds V — toggle between 1× and your preferred speed Shift (hold) — 1× and rewind 3 seconds Click the speed badge — pick a speed from a quick list The shortcut panel sits on the video until you close it. ━━ PRIVACY ━━ Rapdex does not collect any data and shows no ads. Your statistics stay in your browser and never leave it. ━━ FAQ ━━ Does audio sound strange at high speed? Rapdex preserves voice pitch by default. You can turn that off in the panel. Why does YouTube speed reset to 1×? YouTube resets the playback rate when the video or quality changes. Rapdex detects that and reapplies your choice. Found a site where it does not work? Report it at github.com/rapdex/rapdex/issues.