Change a clip’s speed from 0.25× to 4× and download a silent MP4. This tool retimes existing frames; it removes audio and does not generate extra frames.
Drop a video here
MP4, MOV, WebM · browser-supported codecs · Up to 2 GB on a computer
Change speed…
Runs on your device. Keep this tab open.
ChatCut opens in a new tab with your request. Add your file there.
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Why ChatCut
Pick 0.25×, 0.5×, 0.75×, 1×, 1.5×, 2×, 3×, or 4× for the entire clip.
At 2×, a 20-second clip becomes 10 seconds. At 0.5×, it becomes 40 seconds.
The audio track is removed, so you do not get sped-up speech or pitch-shifted music.
Existing frames play at the new speed. Slow motion can look choppy when the source has a low frame rate.
The new timing is written into an MP4 file, so it stays in effect when you share or play the download.
The browser decodes and encodes the video on your device, without an account or watermark.
How it works
Open a supported video up to 1080p, 3 minutes, and 512 MB.
Choose 0.25×–4×. The result is silent and must stay within 4 minutes.
Run the tool, preview the MP4, and download it. Add a soundtrack later if you need one.
Learn
Divide the original duration by the selected speed to estimate the result. A 60-second recording at 2× becomes about 30 seconds; the same source at 0.5× becomes about two minutes. The input can be up to three minutes, but the output must stay within four minutes. At 0.25×, a source longer than one minute would exceed that output limit. Choose a higher multiplier or trim the source first when your desired slowdown would create a result that is too long.
The selector offers eight rates from 0.25× through 4×, with 1× keeping the original pace. The chosen rate applies to the complete clip. There is no control here for accelerating gradually, pausing at a particular moment, or slowing only one part. For a demonstration with an important detail, consider saving that section separately before changing its speed. Check that viewers can still follow the action and read any on-screen instructions.
The tool changes the timing of existing frames and encodes them into a new H.264 MP4. It does not generate extra frames between the captured moments. At a slower rate, each available frame stays visible longer, which can make movement appear stepped. A faster rate shortens both the overall playback time and the time available to inspect details. Preview the output rather than assuming that a particular multiplier will look right for every source. Re-encoding can also change the picture quality.
Audio is removed for every speed choice, including 1×. The tool does not stretch speech, preserve pitch, or carry the original soundtrack into the download. Use it for footage where the visual timing is the main goal, or plan to add a separate audio file in your next edit. Keep the original recording if dialogue or location sound may be needed later. Changing the downloaded clip back to its original speed will not restore an audio track that the export omitted.
Use cases
Speed up a repetitive assembly step while keeping the whole action visible.
Slow a short sports or dance clip to look at the sequence of movement.
Change the pace of a silent background shot before combining it with other footage.
Keep editing
Add your speed-adjusted MP4 in ChatCut to combine it with other shots, trim its ending, or place your own soundtrack underneath. Download the file first, then add it in the editor.
Skills
100+ Skills. No experience needed. Start in one click.
FAQ
Choose a file and select a speed above 1×, such as 2× or 4×. Run Change speed to save an MP4 with the new timing.
Choose a speed below 1×. At 0.5× a clip takes twice as long to play; at 0.25× it takes four times as long.
No. This local tool removes audio at every speed, including 1×. Add your own soundtrack in ChatCut after downloading the result.
No new frames are created here. The existing frames receive different timestamps and display durations. A source with few frames per second can look uneven when slowed, because the tool has no additional moments of motion to show.
This tool applies one speed to the full clip. Use the ChatCut timeline to split the clip and adjust the speed of the section you want.
A player speed control changes only how you watch the original. This tool exports a new video with the timing already changed.
The input can be up to 3 minutes, 512 MB, and 1080p in landscape or portrait. Output is limited to 4 minutes, so longer inputs cannot use the slowest settings.
Yes. Download the file and add it to the ChatCut timeline to split, arrange, or adjust clips with the Speed control. Manual timeline editing does not use credits. Keep the source if you need its audio later.
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