Speed up or slow down a video online — free
Change a video's playback speed for slow motion or fast-forward. Pick a multiplier from slow (0.5×) to fast (2× and beyond) and export smoothly.
How to speed up or slow down a video
- Drop your video file into the upload box, or click to browse. Everything stays on your device.
- Pick a speed multiplier — for example 0.5× for slow motion or 2× for fast-forward.
- Click Process — everything runs instantly in your browser, with nothing uploaded.
- Preview the result and download it — or send it straight to another JustGIF tool to keep editing.
Features
- Slow motion or fast-forward
- Smooth playback at any speed
- Runs locally in your browser — your files never leave your device
- 100% free: no sign-up, no watermark, no file-count limit
- Works on any device — Windows, Mac, Linux, Android and iPhone
Frequently asked questions
Can I make slow motion?
Yes — choose a speed below 1× for a slow-motion effect.
Is Video Speed free to use?
Yes. Video Speed is completely free with no account, no watermark, and no limit on how many files you can process.
Do my files get uploaded to a server?
No. JustGIF processes everything locally in your browser, so your files stay private on your device and nothing is uploaded.
Does it work on my phone?
Yes — JustGIF runs in any modern browser, including Chrome and Safari on phones and tablets, with no app to install.