Change audio speed — free, online
Make any audio faster or slower: half speed to double speed, in fine steps. Perfect for podcasts, audiobooks and practice tracks. 100 % in your browser — nothing is uploaded.
Drop an audio file here
or drag & drop here
Duration: — ·
Size: —
New duration: —
Working…
How to change audio speed
- Upload your audioDrop it above — it never leaves your browser.
- Pick a speedDrag the slider or tap a preset from 0.5x to 2x.
- Convert and downloadPress “Change speed” and get your watermark-free MP3.
Popular uses
Tap a preset, then upload:
Frequently asked questions
Does the pitch change with the speed?
Yes — honestly, it does. Like speeding up a tape, faster means higher-pitched and slower means lower-pitched. This tool changes tempo naturally; it does not do pitch-preserved time-stretching.
What speeds are supported?
Anything from 0.5x (half speed) to 2x (double speed), in 0.05 steps. 1x is the original speed.
Will this reduce audio quality?
The result is re-encoded as a 192 kbps MP3, which sounds great for voice and music. It is not lossless — for archive masters keep the original.
Does my audio leave my device?
Never. Speed changing runs entirely on your device using a WebAssembly build of FFmpeg, loaded unmodified from a CDN. Your file is never uploaded to any server.
Is it really free? Any watermark?
Yes — 100% free with no signup and no watermark, and no limit on how many files you process (files up to 500 MB are supported).
Which formats can I upload?
MP3, WAV, M4A, OGG, FLAC and most common audio formats work. The result always downloads as MP3, which plays everywhere.
Need another video tool?
Scripts that sell, captions without watermarks, silence removed and more — 15 free tools that run entirely in your browser.