Does the audio pitch change along with speed, or stay natural?

Audio is adjusted to stay in sync with the new speed — at extreme speed changes, some pitch shift is a natural side effect of speeding up or slowing down sound.

What's a typical speed range this supports?

It covers both subtle adjustments (slightly faster or slower) and more extreme speed changes (multi-times faster for timelapse-style effects, or significantly slower for dramatic slow motion).

Does changing speed affect video quality?

No, the visual quality of each frame is unaffected — only playback timing changes.

Does Video Speed Changer upload my files to a server?

No. Video Speed Changer runs entirely in your browser using on-device processing, your files never leave your device.

Video Speed Changer

Speed up or slow down a video, audio included.

Runs in your browser

Drop a video file here

Choose File

Speed

Adjusts both video and audio together, so pitch and motion stay in sync. Requires the video to have an audio track. Runs entirely in your browser using an on-device video engine, which downloads on first use, then is cached.

About this tool

Speeding up a long screen recording into a quick timelapse, or slowing down footage for a dramatic effect, both mean changing playback speed — and doing it properly means adjusting the audio's pitch and timing along with the video, not just skipping frames. This tool speeds up or slows down a video with its audio included, keeping sound in sync with the new playback speed instead of leaving it desynced or silent.

Frequently asked questions

Audio Speed Changer

Speed up or slow down an audio file.

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