Free tool · Edit
Audio Speed Changer
Speed up or slow down — pitch stays natural.
Drop your audio here
or click to choose a file
MP3 · WAV · M4A · OGG · WEBM · FLAC — up to 300MB
Processed entirely in your browser — your file is never uploaded.
How it works
- 1
Upload your audio
Any of the supported formats.
- 2
Pick a speed
From 0.25x up to 4x.
- 3
Download the re-timed file
Same format as your original.
Why use it
Real time-stretching
Voices stay natural instead of turning into chipmunk or slow-motion pitch shifts.
Wide range
0.25x to 4x covers both slowing down and speeding up.
Keeps the original format
Output matches whatever you uploaded.
Supported formats
Who it's for
- Reviewing recordings faster — Speed up a long recording to get through it quicker.
- Catching fine details — Slow down a recording to transcribe by ear or catch what was said.
- Adjusting pace before sharing — Tune a voice memo's speed before sending it along.
Frequently asked questions
Does the pitch change too?
No — this uses proper time-stretching, not simple resampling, so voices stay natural at any speed instead of turning into chipmunk or slow-motion pitch shifts.
What speed range is supported?
0.25x (four times slower) to 4x (four times faster).
Is it free?
Yes, completely free with no account required and no limit on files — everything runs in your browser, so there's no server quota to hit.
Related tools
Need this outside the browser?
VoxaType turns your voice into polished text everywhere you type — messages, emails, notes, and code — no upload, no file size limit, no waiting for a page to process.