Video Speed Changer Online

Upload a video, choose a slower or faster playback speed, and download an MP4 without a watermark. Speed up video for time-lapse clips, slow down video for slow motion, or enter a custom speed while keeping the source dimensions up to 1 GB.

Change video speed online

MP4, MOV, WebM, MKV, AVI, M4V, FLV, WMV, MPEG, and 3GP files are accepted up to 1 GB.

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速度

How to change video speed online

第 1 步

Upload an MP4, MOV, WebM, MKV, AVI, M4V, FLV, WMV, MPEG, or 3GP video.

第 2 步

Choose a preset such as 0.5x for slow motion or 2x to speed up video, or enter a custom speed from 0.25x to 4x.

第 3 步

Keep audio tempo adjusted or mute the audio when you only need a visual slow-motion or time-lapse clip.

第 4 步

Change speed and download the finished MP4 video without a watermark.

相关媒体工具

视频剪辑器 Cut a clip before changing playback speed. 视频压缩器 Reduce file size after exporting a faster or slower video. 视频旋转器 旋转视频并修复侧向拍摄的手机录像。 视频转GIF制作器 Create an animated GIF from a sped-up or slowed-down segment. 从视频中提取帧 Save still images from selected timestamps. 从视频中提取音频 Download the audio track from a video file. 视频合并器 Join clips before exporting the final video. 视频转换器 转换MP4、MOV、WebM、MKV、AVI等。 MP4 to MP4 Rebuild or re-encode MP4 video files. AVI 转 MP4 Convert AVI video to MP4 for wider playback and sharing.

常见问题解答

Is this video speed changer free?

Yes. You can speed up or slow down videos for free, without signup, software installation, paid APIs, or a watermark.

Can I speed up video online?

Yes. Choose 1.25x, 1.5x, 2x, or enter a custom value up to 4x to make a video play faster and export it as an MP4.

Can I slow down a video for slow motion?

Yes. Choose 0.75x, 0.5x, 0.25x, or any custom speed below 1x to create a slower video or slow-motion clip.

Will changing speed reduce video resolution?

No. Convertr preserves the source dimensions and uses a high-quality re-encode because speed changes require new video timestamps.

Can I mute the audio?

Yes. Use the mute-audio option when you only need a visual time-lapse or slow-motion video. Otherwise, Convertr adjusts audio tempo with ffmpeg.

最大上传大小是多少？

上传限制为1 GB，与Convertr的其他功能一致。在此限制内，支持全分辨率视频。