Free Audio Speed Changer
Speed up or slow down a track without changing its pitch — free, no sign-up, no watermark.
Click to upload or drag and drop
MP3, WAV, FLAC, M4A, AAC, OGG — up to 50MB
Speed changes are more CPU-intensive than other tools — limited to 3 requests per 5 minutes. Adjust the slider, then apply once you're happy with the value. Output duration will differ from the original.
50%–200%
Half speed to double speed.
Pitch unaffected
Key stays the same, only speed changes.
No sign-up
No account, no email, no watermark.
Common uses
Slow a track down to learn a fast passage note-by-note, speed up a lecture or podcast to save time, or nudge a track's tempo slightly to match another for a mashup — all without the pitch shifting along with it, which is what a simple playback-speed change would do instead.
Need to change key without affecting speed? Use the Pitch Shifter instead — same engine, applied to pitch rather than speed.
More free tools
Frequently asked questions
Does changing speed affect the pitch?
No — tempo is changed independently of pitch, so the key stays the same, only speed and duration change.
What speed range is available?
From 50% (half speed) to 200% (double speed).
Will the output file be a different length?
Yes — speeding up to 200% halves the duration, slowing to 50% doubles it. That's expected, not an error.
Is this really free?
Yes — completely free, no sign-up, no watermark on the output.