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Speed Up or Slow Down a Video or Audio Online

Create slow motion or fast motion from a video or audio file: speed from 0.25× to 4×, with audio adjusted without a “chipmunk” effect, or removed.

🔗 Direct link sahlify.uk/en/change-video-speed/

How does it work?

Type or paste your data.
The result appears instantly.
Copy or download the result.

Why use Change Video Speed?

✓ 100% free, no limits, no watermark
✓ No sign-up, no install
🔒 Files processed locally: full privacy
📱 Works on desktop, tablet and mobile

Frequently asked questions

Does the voice get high-pitched when sped up?

No, pitch is preserved: only speed changes.

Can I slow down audio?

Yes, the tool also accepts MP3, M4A and WAV.

Is the sound changed?

Yes, it follows the speed while keeping a natural pitch up to 2×.

Can I speed up only part of it?

Cut the section first, speed it up, then merge the pieces.

Is this tool really free?

Yes, 100% free, with no sign-up, no watermark and no usage limit.

Are my files safe?

Yes. Processing happens directly in your browser: your files are never uploaded to a server or stored.

When to use it

Speeding up a video creates a timelapse or shortens a tutorial or recipe for TikTok; slowing it down highlights a sports move, a dance step or a funny moment.

Our tips

💡 1.25×–1.5× still sounds natural for spoken videos.
💡 For smooth slow motion, start from footage shot at 60 or 120 fps.
💡 Above 2×, mute the sound or replace it with music.