Slow motion
Slow down video without uploading it.
Create a slower MP4 for review, demos, or simple slow-motion playback. Your source file stays local.
Slow down video
Default speed: 0.5x slow motion.
Choose a video fileDrop a file here or click to browse.
Your selected video is processed in this browser tab. It is not uploaded to a conversion server.
Ready.
Slow motion from a local file
The tool expands the video timeline so the output plays more slowly. Audio timing is adjusted with the video.
What happens to your file? It stays in this browser tab while the tool creates the output.
Best settings and limits
Best first try
Use 0.5x for the first version. If you need a precise speed ramp, use a timeline editor.
When this may fail
Slow-motion output is longer than the source and can create larger files.
Privacy boundary
The selected video file stays on your device while the tool creates the output.
Frequently asked questions
Can I slow down a video online without upload?
Yes. The page loads online, but the selected video is processed locally.
What speed is used?
The slow-down page defaults to 0.5x.
Will the output stay MP4?
Yes. The download is an MP4 file.