Change the playback speed of any audio file online free, from 0.25x to 4x - works entirely in your browser with no uploads required. Note: speed change is done by resampling, so pitch shifts along with speed rather than staying preserved.
If this tool isn’t working as expected, please take a screenshot of the error and report the problem here so we can investigate and improve it.
Changing playback speed is useful whenever a pitch shift is acceptable or even desirable - quickly previewing a lecture or clip, creating a sped-up or slowed-down effect for content or music editing, or a quick tempo change where the pitch shift doesn't matter. Because this tool resamples rather than time-stretches, it isn't the right choice when you need speech or music to stay at its original pitch while playing faster or slower - even a moderate speed increase like 1.25×–1.5× will noticeably raise the pitch, not just the pace.
Upload an audio file and change its playback speed using a speed slider or presets from 0.25× to 4×. This tool changes speed by resampling the audio - the same principle as speeding up or slowing down a tape or turntable - so pitch shifts along with speed: faster playback sounds higher-pitched, slower playback sounds lower-pitched. It does not use pitch-preserving time-stretching.
Select an audio file from your device (MP3, WAV, OGG supported).
Use a preset (0.5x-2x) or the custom slider, which covers 0.25x to 4x.
Play back the adjusted audio to confirm the speed feels right - note that pitch shifts along with speed.
Download the speed-adjusted audio as a WAV file.
Click the upload area and select an MP3, WAV, OGG, or AAC file from your device.
Choose one of the seven presets (0.5×–2×) or drag the slider for any value from 0.25× to 4×, in 0.05× steps.
Click Apply to process the file - the button is disabled until you pick a speed other than 1×.
Listen to the result in the built-in player, then download it - always as a WAV file, regardless of your original format.
Best For
Input
"lecture.mp3" played at 2×Result
The audio plays twice as fast and noticeably higher-pitched - a chipmunk-style effect, not pitch-preserved speechBecause this tool changes speed by resampling (the AudioBufferSourceNode's playbackRate), pitch rises in direct proportion to speed - 2× speed raises the pitch by a full octave, the same as playing a 45 RPM record at 78 RPM.
Input
"song.wav" played at 0.5×Result
The audio plays at half speed and noticeably lower-pitched, not the original pitch stretched out in timeThe same resampling principle applies in reverse - half speed drops the pitch by a full octave, the deep-voice/slow-motion effect that pitch-preserving time-stretching tools are specifically built to avoid.
Input
Dragging the custom slider past the 2× preset buttonResult
The slider continues up to 4×, in 0.05× incrementsThe seven quick-select presets only go up to 2×, but the custom slider's real range is 0.25× to 4× - drag past the last preset for a faster speed.
Speed through content quickly when a pitch shift in the speaker's voice is an acceptable tradeoff.
Speed up a track to raise its pitch and tempo together, a deliberate creative effect this tool naturally produces.
Slow a track down for a deliberate deep-voice or slow-motion effect.
Speed up or slow down a clip as a raw creative element, where the accompanying pitch shift is part of the effect.
Problem
Solution
This tool doesn't time-stretch - it resamples, so pitch shifts along with speed. For pitch-preserved playback, use a dedicated time-stretching tool or a podcast app's built-in speed feature.
Problem
Solution
The result always downloads as a WAV file, regardless of whether you uploaded MP3, OGG, or AAC.
Problem
Solution
The seven presets stop at 2×, but the custom slider goes up to 4×.
Problem
Solution
The Apply button is disabled at 1× since there's nothing to change - pick a different speed first.
If you need speech or music to stay at its original pitch while playing faster or slower, this resampling-based tool isn't the right one - look for a tool that specifically offers time-stretching.
The presets stop at 2×; drag the slider for anything up to 4×.
Even 1.25×–1.5× will raise the pitch slightly, not just the pace - factor that in if speech clarity matters.
The download is always WAV - run it through a converter afterward if you need MP3 or another compressed format.
Speed changes shift pitch proportionally, exactly like a tape or turntable played faster or slower. There's no WSOLA, phase vocoder, or other pitch-preserving algorithm.
Regardless of input format, the download is always a 16-bit WAV file - there's no format selector.
The quick-select presets and the custom slider don't cover the same range - use the slider for speeds outside 0.5×–2×.
There's no way to change pitch without changing speed, or vice versa - the two are always linked.
The whole file is decoded into memory in your browser before processing, so very long or large files may be slow or hit your browser's memory limits.
Both change playback speed, but only one keeps the pitch unchanged.
| This Tool (Audio Speed Changer) | A Pitch-Preserving Time-Stretch Tool | |
|---|---|---|
| Pitch at 2× speed | Rises about one octave (chipmunk effect) | Stays the same as the original |
| Method | Resampling (playbackRate) | Time-stretching (WSOLA, phase vocoder, or similar) |
| Best for | Effects, previews, or cases where a pitch shift is acceptable | Podcast/lecture speed-listening, music practice at a different tempo |
| Output format | Always WAV | Varies by tool |
Visitors most often assume this tool preserves pitch the way some podcast apps do - it doesn't. This tool resamples the audio to change its speed, exactly like changing the speed of a tape or turntable, so the pitch rises when you speed up and falls when you slow down. The FAQ below explains this plainly, along with the output format and the slider's real range.
No. This tool changes speed by resampling the audio (adjusting the AudioBufferSourceNode's playbackRate) - the same principle as playing a tape or record faster or slower. Pitch rises when you speed up and falls when you slow down; there's no WSOLA, phase vocoder, or other pitch-preserving time-stretching algorithm involved.
Because speed changes here are done by resampling, not time-stretching - doubling the speed doubles the sample playback rate, which raises the pitch by a full octave as a direct side effect, the classic "chipmunk" effect. A dedicated time-stretching tool avoids this by keeping pitch and speed independent; this tool does not.
Seven quick-select presets cover 0.5x to 2x. The custom slider covers a wider range, 0.25x to 4x, in 0.05x increments - use the slider if you need a speed outside the presets.
Always a WAV file, regardless of what format you uploaded (MP3, OGG, or AAC all convert to WAV on output) - there's no option to keep the original compressed format.
No. Speed and pitch are always linked in this tool - there's no independent pitch-shift control.
No. CoditTools's audio speed changer decodes and processes your file entirely in your browser using the Web Audio API - it's never uploaded to a server.
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