Change Video Speed

Create slow-motion highlights or fast-forward timelapses without a timeline editor. Pick a speed factor — half speed for drama, double speed for walkthroughs — and export a new MP4 with adjusted duration and pitch-corrected or natural audio depending on your settings.

Ideal for sports replays, tutorial acceleration, meme timing, and product demos where you control pacing in seconds.

How to speed up or slow down video online

1

Upload clip

Shorter clips encode faster; trim first for long recordings.

2

Select speed

Choose presets like 0.5×, 1.5×, 2× or custom values supported by the tool.

3

Review audio

Extreme slow-mo may deepen audio; consider muting for VO replacement.

4

Process

FFmpeg adjusts frame timing and audio tempo.

5

Download

Share the paced clip or compress for messaging limits.

Common use cases

  • Sports highlights

    Slow key moments for analysis reels on Instagram.

  • Tutorial acceleration

    Developers speed up repetitive coding segments for YouTube.

  • Timelapse feel

    2×–4× speed turns long walks or builds into watchable Shorts.

  • Comedy timing

    Fast-forward boring setups, slow-mo punchlines for meme formats.

Best practices

  • For silky slow motion, start with 60fps source if possible — 30fps at 0.5× can look choppy.
  • Mute and add music when pitch-shifted audio sounds odd.
  • Combine reverse + speed for creative trend edits.
  • Check platform length limits after speed changes — faster clips shrink duration.
  • Export once; chaining multiple speed passes degrades quality.

Formats & compatibility

Outputs MP4. Supported speed factors depend on the UI (typically 0.25×–4× range). Audio is time-stretched with video; extreme factors may sound unnatural on speech.

Related tools

Pick your speed factor above and download a paced MP4 ready to post.

Frequently asked questions

0.5× halves speed; lower factors may be available. Below 0.5× on 30fps footage can look stuttery.
Audio is stretched with tempo — speech may sound unnatural at extreme speeds. Mute and add music if needed.
One encode at reasonable bitrate preserves detail. Very high speeds on low-FPS sources look jumpy.
Yes on capable desktops; expect longer processing.
We offer quick single-factor changes in-browser. Complex speed ramps need a full NLE.
Speed changes run locally; files are not uploaded.