Speeds from 0.25× to 4×
- Slower: 0.25×, 0.5× and 0.75×.
- Faster: 1.25×, 1.5×, 2×, 3× and 4×. The page opens at 2×.
- Your speed: any number from 0.25 to 4, such as 1.75.
- A 1:00 clip at 2× becomes 0:30; at 0.5× it becomes 2:00.
Change video speed online
Speed up a long lecture or slow down a jump, from a quarter speed to four times faster. The clip stays on your device and never reaches our server.
or drop a file anywhere on this page
MP4, MOV, WebM, MKV and more · any video this device can play
Your privacy comes first
Your contracts, passport scans and family videos stay yours. No one but you gets to see them.
We never store your files
They don’t even reach us: your phone or computer does the work. Nothing to delete later.
100% free
No daily limits, no file-size cap, no paid Pro plan.
No sign-up
No account to create, no email to give. No account, nothing to hack.
How it works
- Choose a videoOpen an MP4, MOV, WebM or MKV from your phone or computer.
- Pick the speedTap 0.5× to slow it down or 2× to speed it up, or type your own number.
- Save the videoEvery frame is written anew at the chosen speed.
How to speed up or slow down a video
To change video speed here you need no timeline and no keyframes: one number for the whole clip. The preview plays at the new rate right away, so you hear the result before saving, and the new length shows next to it. It is free, without an account, and we set no file-size limit.
Speed up a video without the chipmunk voice
Keep voice natural is on by default: speech gets faster or slower, but its pitch stays the same. Turn it off for the tape effect, where voices go high when faster and low when slower. Without sound saves the clip silent, which suits a timelapse.
Make a slow motion video
Pick 0.5× to halve the motion or 0.25× for a very slow look. Each frame is held longer; no made-up frames are added in between. A clip filmed at 60 fps or more slows down more smoothly, so switch the phone camera to 60 fps or Slo-mo before filming a jump or a splash.
Which speed for what
- Lectures and webinars: 1.25× or 1.5× saves time and keeps speech easy to follow.
- Cooking and craft clips: 2× or 3× skips the slow parts.
- Timelapse from a normal clip: 4×, usually without sound.
- Sports, dancing and pets: 0.5× or 0.25× shows what the eye misses.
What you get
- An MP4 by default (a MOV stays MOV); WebM can be chosen too.
- The original frame rate, up to 60 fps, so playback stays even.
- Saving takes longer than a plain copy, because every frame is encoded again.
- A faster clip is a smaller file, roughly in proportion.
Free, fast and all yours
Free forever
Every tool is free and will stay free. No trial, no ads, no paid plan.
No sign-up, no login
Open the page and start. No account, no email, no password.
Instant
Nothing to upload and no queue: a video opens in a second, a simple trim saves in seconds.
No file size limits
We set none. A file can be as big as your device can handle.
No watermarks, no copyright
No logo on top and no rights claimed: what you make is 100% yours.
Made for phones too
The same tools on iPhone, Android and a computer, with big buttons and plain words.
Questions
Choose the video. The page already opens at 2×, so press Save video. For other rates tap 1.5×, 3× or 4×, or type your own number.
Open this page in Safari, choose the clip from Photos, tap 0.5× or 0.25× and save. The slowed copy lands in Downloads in the Files app.
Yes, that is the default. Keep voice natural holds the pitch at every speed. Switch it off only if you want the old tape sound.
No, the whole clip gets the new speed. Trim it first so only the part you need remains.
In two passes. Save at 4×, open the result and save it again at 2.5×: four times 2.5 makes 10×. Two passes at 4× give 16×.
Frames are held longer, not invented. A clip filmed at 30 fps shows that at 0.25×; one filmed at 60 fps or in Slo-mo stays smooth.
Yes, roughly in proportion: at 2× the clip is half as long, and the file is usually about half the size.