Video Speedifier vs Speed Browser App

Take control of every video you watch. Video Speedifier is a clean, powerful Safari extension that lets you adjust playback speed on any website with precision and ease. Use the smooth slider for fine-grained control (0.1× increments) or tap the quick preset buttons for common speeds. Turn on Overdrive when you want to push speeds even higher. It works across YouTube, Netflix, online courses, Twitch, and most other video players — including tricky ones that try to reset the speed. Key Features • Precise speed control from 0.1× up to 5× • Customizable preset buttons • Overdrive mode for faster playback • Works on iPhone, iPad, and Mac • Clean, modern interface built with SwiftUI • Intelligent handling of dynamic and embedded videos Getting started is simple: install the app, enable Video Speedifier in Safari’s Extensions settings, and you’re ready to go. The extension then appears in your toolbar whenever you need it. Whether you’re speeding through lectures, slowing down language content, or just want to watch at your own pace, Video Speedifier gives you full control without leaving the page.

Browse with clear, familiar mobile controls—and spend less time waiting on artificial page delays. Speed Browser can independently accelerate JavaScript timeouts and intervals, animation-frame timestamps, Web and CSS animations, and audio or video playback. Give timers and animations their own multiplier from 1× to 100×, set media playback from 1× to 16×, or turn off only the types a website needs to run normally. Media rates may be limited further by the webpage or browser. Manual mode gives you a live view of active page timers. Invoke a timer immediately, pause invocations, disable one call, block a repeating source, or hide noisy sources. Speed Browser keeps your preferences and recent URLs on your device. It contains no ads and no third-party analytics. Speed Browser does not speed up downloads, network requests, or browser-native work. Some websites may behave unexpectedly at high multipliers; you can always switch a type to 1×, turn it off, or disable acceleration for that site.