Free Audio Speed Changer
Speed up or slow down audio without changing the pitch.
Perfect for faster podcasts or slowed-down practice tracks — need a key change instead of a tempo change? Try the Audio Pitch Changer.
Drop your audio file here
or click to browse • MP3, WAV, FLAC, OGG, M4A
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Time-Stretching
Uses librosa time-stretching so pitch stays intact at any speed.
Fine Control
Pick a preset or type a precise multiplier between 0.1x and 8x.
Preview First
Listen to the re-timed audio before downloading.
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Frequently Asked Questions
Does it change the pitch?
No. The speed changer uses time-stretching to preserve pitch while changing duration, so a slowed-down song still sounds in tune and a sped-up voice doesn't turn into a chipmunk.
How do I slow down a song without changing the pitch?
Upload the track, choose a speed below 1x (for example 0.75x or 0.5x), preview, and download. The pitch stays exactly the same — ideal for learning an instrument or transcribing lyrics.
Can I speed up a podcast or audiobook?
Yes. Pick 1.25x, 1.5x, or 2x to get through spoken audio faster while keeping the speaker's voice natural. Great for lectures, podcasts, and audiobook MP3s.
What speeds are supported?
Anywhere from 0.1x (much slower) up to 8x (much faster). Common presets include 0.5x, 0.75x, 1.25x, 1.5x, and 2x, or type an exact multiplier.
What formats can I upload?
MP3, WAV, FLAC, OGG, M4A, or AAC.
Is preview available?
Yes. After processing, an audio player lets you listen before downloading.
Related audio tools
Trim, reverse, pitch-shift, and convert audio online.