Vidsembly
Back to all tools

Video Tools

Video Speed Controller

Speed up or slow down video clips directly in your browser. Upload MP4, WebM, MOV, AVI, and other video files, choose a playback speed from 0.25x to 4x, then export MP4 files individually or as a ZIP. Your files stay on your device. Free to use with no account or card needed.

Drop video files here

Speed up or slow down MP4, WebM, MOV, AVI, and more. ZIP export supported

  • Free to use
  • No account required
  • Files stay in your browser
  • 0.25x to 4x speed presets
  • Batch MP4 export + ZIP

Need more than a free tool?

Vidsembly helps creators turn ideas into finished video content, from draft to publish, in one place.

Visit VidsemblyExplore AI-powered video tools →

Frequently asked questions

How do I change video speed online?
Upload one or more videos, choose a speed preset such as 0.5x, 1.5x, 2x, or 4x for each file, then click Change video speed. When processing finishes, download each MP4 individually or export all finished files as a ZIP.
Is this video speed controller free?
Yes. This video speed controller is completely free with no account, card, watermark, or software install required.
Are my videos uploaded to a server?
No. Speed changes run locally in your browser using FFmpeg compiled to WebAssembly. Your source videos are not sent to Vidsembly or any third-party server.
Which video speeds can I use?
You can export videos at 0.25x, 0.5x, 0.75x, 1x, 1.25x, 1.5x, 2x, 3x, or 4x speed. Slower speeds are useful for review and tutorials, while faster speeds work well for demos, recaps, and time-lapse style clips.
Does changing video speed also change the audio?
Yes. When the source video has audio, the tool adjusts the audio tempo to match the selected video speed and exports an MP4 with synchronized sound.
What video formats can I speed up or slow down?
MP4 and WebM usually work best in modern browsers. MOV, AVI, MKV, M4V, WMV, FLV, OGV, MPEG, MPG, and 3GP files are also accepted when the browser and FFmpeg can read the source codec.
Can I change the speed of multiple videos at once?
Yes. Add multiple videos, choose a speed for each file, process them in one session, then download finished MP4 files individually or use Download All for a ZIP archive.

About this tool

Speed up video for faster reviews

Speeding up a video helps viewers move through long screen recordings, lesson recaps, meeting highlights, product demos, and process footage more quickly. A 1.5x or 2x export can keep the full sequence while reducing the time needed to watch it.

Slow down video for clearer learning

Slower speeds are useful when viewers need to study movement, timing, steps, gestures, or details that pass too quickly at normal speed. Use 0.5x or 0.75x for tutorials, sports clips, classroom demos, software walkthroughs, and training examples.

Private browser-based speed changes

Videos can include student names, customer data, internal dashboards, unreleased creator footage, or private training material. This video speed controller processes files locally in the browser, which helps avoid another upload step for simple timing changes.

Choose the right speed preset

Use 0.25x for very slow motion checks, 0.5x for detailed review, 0.75x for a gentle slowdown, 1.25x or 1.5x for concise walkthroughs, 2x for quick recaps, and 3x or 4x for time-lapse style summaries. Review the exported file before publishing so motion and audio still feel natural.

Batch export speed-adjusted videos

When a project includes several clips, add them in one session and choose separate speeds per file. You can prepare slow-motion examples, faster review cuts, and time-lapse exports together, then download single MP4 files or package all finished videos in a ZIP.

Related tools

Video Trimmer

Cut and trim video clips to the exact segment you need. Free to use with no account or card needed.

Video to GIF Converter

Convert short video clips into looping GIFs. Free to use with no account or card needed.

Video Aspect Ratio Cropper

Crop videos for TikTok, Reels, Shorts, Instagram, and other social platforms. Free to use with no account or card needed.

Video Merger

Combine multiple video clips into a single seamless file. Free to use with no account or card needed.