Speed tools
2 tools tagged with “Speed”
Speed Converter
Convert speed and velocity between mph (miles per hour), km/h (kilometers per hour), m/s (meters per second), knots, fps (feet per second), and Mach numbers using accurate conversion formulas for vehicles, aviation, and physics calculations.
Developer Utilities · Data Converters
Video Speed Changer
Video Speed Changer is a practical utility for adjusting playback speed of uploaded videos while preserving synchronized audio for real-world use cases like lectures, tutorials, demos, and social clips. You upload a video, choose a speed multiplier from 0.25x to 4x, and export a new MP4 generated on the backend with FFmpeg. The processing pipeline applies a video timing transform and audio tempo correction so speech remains aligned after acceleration or slowdown. This solves a common editing pain point where users need to shorten long recordings for faster review or slow down fast action for clearer explanation without opening complex desktop editors. The tool also includes a sample input button for instant testing and an optional AI Assistant that suggests practical speed settings based on your goal, while requiring explicit user action before any AI analysis runs.
File Conversion · Video Converters