offlinewebtools.com — free, watermark-free browser tools that stay on your device with nothing uploading to our servers

Video Speed Changer

Adjust video playback speed to create fast-forward or slow-motion effects with synchronized audio speed adjustment.

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Source file

Files are processed locally in your browser using WebAssembly.

Speed Multiplier

0.5 = half speed, 1.0 = normal, 2.0 = double speed

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.