Video Speed Changer
Make a video faster or slower, from 0.25× to 4×, with natural-sounding audio – no upload, no sign-up, no watermark added.
- No upload
- No sign-up
- No new watermark
- MP4, MOV, WebM, MKV, AVI
Speed up a tutorial so it fits a Short, turn a walk-through into a timelapse, or slow a sports clip down to see what happened. This tool changes the playback speed of both the picture and the sound.
Pick a factor between 0.25× and 4×. The audio is stretched with FFmpeg's atempo filter, so voices keep their normal pitch instead of turning into chipmunks or a low growl.
It all runs in your browser with FFmpeg WebAssembly. Your file never leaves your device, and the result is an H.264 MP4.
2× for tutorials and screen recordings
Speech at 2× is still clear with pitch preserved. Above 3× it becomes hard to follow, so consider muting instead.
Slow motion has limits
0.5× on 60 fps footage looks smooth. At 0.25× on 30 fps video, frames are repeated and motion looks steppy. Shoot at a high frame rate if you plan to slow down.
Trim first for long clips
Slowing down makes the file longer and heavier. Cut the section you need with the video cutter, then change the speed.
All tools
Watermark removal
Video watermark remover
Draw a box over any watermark, logo or text and download a clean MP4.
TikTok watermark remover
Clean the moving TikTok logo and @username from your own downloaded videos.
Sora watermark remover
Remove the animated Sora and Sora 2 logo from AI videos you generated.
Veo watermark remover
Take the Veo 3 sparkle mark off videos made with Gemini or Google Flow.
Gemini watermark remover
Erase the ✦ sparkle from Gemini images and Veo videos.
Gemini image watermark remover
Fill in the bottom-right sparkle on Gemini and Nano Banana images at full resolution.
Gemini image logo remover
Erase the corner ✦ logo from Gemini-generated images.
Nano Banana watermark remover
Clean the sparkle off Nano Banana / Gemini image outputs.
Gemini video watermark remover
Remove the Gemini sparkle watermark from Veo 3 videos generated in the Gemini app.
Gemini logo remover
Remove the corner logo from Gemini, Veo and Flow video exports.
Gemini video logo remover
Remove the corner logo from Veo 3 videos made in Gemini.
Veo logo remover
Remove the Veo 3 corner logo from generated videos.
Image watermark remover
Fill or blur a logo or text on PNG, JPG and WebP images in your browser.
Remove logo from video
Erase TV channel bugs, stock-footage stamps and screen-recorder logos from a fixed corner.
Remove text from video
Blur or fill captions, dates, usernames and timestamps burned into the picture.
Edit video
Crop video
Drag a crop box or pick 1:1, 4:5, 9:16 or 16:9 and export a clean MP4.
Video cutter
Trim a video to a start and end time, with a fast no-re-encode mode.
Video compressor
Reduce a video's file size by quality or resolution, typically 50–80 % smaller.
Resize video
Scale a video to 1080p, 720p, 480p or social-media sizes while keeping the aspect ratio.
Rotate video
Rotate a video 90, 180 or 270 degrees and fix sideways phone clips.
Flip video
Mirror a video horizontally or vertically to un-mirror selfie clips.
Video speed changer
Speed up or slow down a video from 0.25× to 4× with audio pitch preserved.
Reverse video
Play a short video backwards, with the audio reversed too.
Loop video
Repeat a clip 2–10 times or up to a target duration for Instagram and boomerangs.
Mute video
Remove the audio track from a video in seconds without re-encoding the picture.
Convert
Video converter
Convert MOV, MKV, AVI or WebM to MP4, or MP4 to WebM, in your browser.
MOV to MP4
Convert iPhone and QuickTime MOV files to H.264 MP4 that plays everywhere.
WebM to MP4
Convert VP8/VP9 WebM files to H.264 MP4 for phones, editors and social apps.
MKV to MP4
Convert Matroska MKV files to H.264 MP4 for phones, TVs and editors.
AVI to MP4
Convert old camcorder and DivX/Xvid AVI files to H.264 MP4.
MP4 to WebM
Convert MP4 to a smaller VP9 + Opus WebM for websites and Discord.
Video to GIF
Make a looping GIF from a short video clip, with a palette pass for clean colours.
Frequently asked questions
Does changing the speed change the pitch of voices?
No. The audio is time-stretched with atempo, which keeps the original pitch at any speed from 0.25× to 4×.
Does it reduce video quality?
The video is re-encoded to H.264. On the High setting the difference is not visible. Slow motion can look steppy if the source frame rate is low.
What formats are supported?
MP4, MOV, WebM, MKV and AVI go in. An MP4 comes out. Files under about 300 MB and 1080p are comfortable.
Is it free?
Yes. No account, no watermark added, and nothing is sent to a server.