Wide speed range
Any rate from 0.25× to 4× — faster or slower, your call.
From 0.25× slow motion to 4× fast-forward — audio and video change speed in sync and pitch is preserved, with key data processed locally and no watermark.
Privacy-sensitive steps are processed in your browser, and data is destroyed when you close the page.
Clean exports with no watermark or hidden marks added.
Runs right in your desktop or mobile browser — no download needed.
Use it right away — no account required.
Privacy-sensitive steps run in your browser, and data is destroyed when you close the page. Work on private footage, business assets and course recordings with confidence.
Any rate from 0.25× to 4× — faster or slower, your call.
Audio is time-stretched without shifting pitch: sped-up voices stay natural instead of turning into chipmunks.
Making slow-motion footage? Tick the option to drop the audio and get pure picture.
Upload a video file
Pick the target speed, optionally remove the audio
Process and download
In the Change Speed tool in WUJIEE Video Tools, pick a rate between 0.25× and 4× and export a new file — unlike a player's playback-speed control that only applies while watching, the exported video itself carries the speed change, so it looks the same for anyone you send it to. Audio and video change speed in sync, no sign-up, no watermark.
No. Audio is time-stretched with the pitch preserved: a lecture at 2× still sounds like a normal human voice instead of a squeaky chipmunk, and slowing down won't turn it into a low drone. If you don't need the audio, tick the option to remove it and output pure picture.
It depends on the source frame rate: 30fps footage slowed to 0.25× is effectively only about 7.5 frames per second, so it looks choppy; footage at 60fps or higher slows down far more smoothly. For silky slow motion, record in a high-frame-rate mode in the first place.
Speed change re-encodes with ffmpeg.wasm in your browser: key data is processed locally, and your data is destroyed when you close the page. It takes roughly 0.5–2× the video's duration, depending on your device.
16 online video tools: compress, trim, convert, turn videos into GIFs, add watermarks and more.
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