Change Video Speed
Speed up or slow down a video while adjusting the audio tempo to match the selected playback speed.
About Change Video Speed
Speed up or slow down a video while adjusting the audio tempo to match the selected playback speed. Video timestamps and audio tempo are adjusted together so the result plays at the selected speed.
How to use Change Video Speed
Upload a video and choose 0.5×, 0.75×, 1.25×, 1.5× or 2× speed. ToolFlow adjusts video timestamps and audio tempo together, then exports a new MP4.
When Change Video Speed is useful
- Prepare video for a player, browser or publishing platform that works better with the output from Change Video Speed.
- Create a smaller or more convenient derivative while keeping the original media untouched.
- Handle a one-off media task without opening a desktop video editor.
Practical tips
- Keep the original media file until you have checked the converted result.
- Re-encoding can change quality and file size; avoid repeated conversions between lossy formats.
- Large or long media files take more server time, so use the shortest source that meets your needs.
Change Video Speed FAQ
Does Change Video Speed change my original input?
No. ToolFlow works on a temporary upload or submitted value and returns a separate result. Your local original is not overwritten.
Do I need to install software to use Change Video Speed?
No browser extension or desktop application is required. Some file tools depend on server modules such as FFmpeg, GD, Poppler or LibreOffice being enabled by the site operator.
Privacy and file handling
Uploaded files are processed in temporary server storage. ToolFlow attempts to delete temporary source and output files after processing or delivery. Do not upload material you are not authorized to process. See the Integritet for details.