Audio Speed Changer (Keep Pitch)
Audio & Video ToolsSpeed up or slow down audio from 0.5× to 2×
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History
All history →Audio Speed Changer (Keep Pitch) — at a glance
Make lectures faster or music slower without sounding like a chipmunk.
How to use it — step by step
An audio file, or a video with sound.
Add audio
Choose a file from your device.
Set the speed
Slide from 0.5× (slow) to 2× (fast). Keep pitch on for natural voices.
Press Change speed
The audio is time-stretched on your device.
Download
Listen first, then save as MP3 or WAV.
Pro tips
Small things that make the result better.
Quick facts
Frequently Asked Questions
Does the pitch really stay the same?+
Yes, with "keep pitch" on. The audio is time-stretched; very extreme speeds can add a slight echo on music.
Can I speed up a video?+
This changes the sound only. Extract the audio from the video first.
How long does it take?+
A 3-minute song takes a few seconds on a modern phone.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.