Slowing a clip down to catch the detail, or speeding it up to fit a time limit, is one of the most useful edits there is. The catch is that naively changing speed makes voices sound like chipmunks. This tool keeps the audio pitch natural at every speed — and it runs free securely.
Copy a video URL from any supported site and paste it into the tool.
The tool loads it ready to change the playback speed.
On the Speed tab, choose 0.5×, 0.75×, 1.25×, 1.5× or 2×.
It’s re-encoded with pitch-corrected audio and saved to your device.
Why the audio stays natural
When you speed a video up, the audio normally rises in pitch — that’s the chipmunk effect. This tool uses pitch-preserving audio processing, so a voice sped up to 1.5× still sounds like the same person, just faster. Slowing down works the same way, keeping voices deep-free and clear.
When to speed up or slow down
- Speed up tutorials, vlogs and montages to keep them tight.
- Slow down sports, dance or technique clips to study the detail.
- Fit a clip into a platform’s maximum length by nudging it to 1.25×.
Tip: For dramatic slow-motion, 0.5× works best on clips that were filmed at a high frame rate — they stay smooth instead of looking choppy.
Change your video speed now
Speed up or slow down any clip with natural-sounding audio.
Open the Speed Changer tool →Frequently Asked Questions
Will the audio sound squeaky?
No — the pitch is preserved, so voices stay natural at every speed.
What speed range is supported?
From 0.5× (half speed) up to 2× (double speed).
Is it free?
Yes, free with no watermark, sign-up or limits.
Why does it take a moment?
Changing speed re-encodes the video, which is heavier than a simple cut.