Change Video Speed
Speed a clip up to 4× or slow it down to 0.25×.
Upload a video and speed it up (1.25× to 4×) or slow it down (0.75× to 0.25×). The sound changes speed with the picture and keeps its natural pitch, or you can remove it. No AI, no credits, just a re-timed copy of the file you upload; results can be up to 3 minutes.
Free to start. No card needed.
How it works
Describe it
Type your idea in a sentence, start from one of the ideas below, or upload the video you want to edit.
ASMRIFY makes it
The generator renders your clip or story, or the edit tool applies your change to the file.
Download and post
Get a vertical video ready for TikTok, Reels and Shorts.
Questions
Does this use AI to generate anything?
No — changes the speed of a video you already have. Nothing is generated; the file you upload is what comes back out, edited.
Does it cost credits?
No credits and no watermark — editing tools are free for every signed-in account, on any plan.
What can I upload?
An MP4, MOV or WebM file from your device, up to the site's upload size limit. The edited file is yours to download; nothing is posted publicly.
Does slow motion look smooth?
Slowing down repeats the frames your clip already has instead of inventing new ones, so half speed of a 60 fps clip stays smooth while quarter speed of a 30 fps clip looks steppy. There is no AI frame interpolation here.
More tools like this
Rotate Video
Fix a sideways or upside-down clip in one click.
Flip Video
Mirror a clip horizontally or vertically.
Resize Video
Fit a clip to TikTok, Reels, Shorts or a square post.
Loop Video
Repeat a short clip to fill a longer runtime.
Increase Video Volume
Turn a quiet clip up — or mute it entirely.
Add Text to Video
Overlay a title, label or call-to-action on a clip.
Make your first one free
No card needed. Type the idea and ASMRIFY does the rest.