100% Free · No Signup · Browser-based

Change Audio Speed
Online — 0.25× to 4×

Speed up or slow down any audio file without changing pitch. Perfect for podcasts, lectures, music practice and more.

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Drag & Drop your audio file here

MP3, WAV, OGG, AAC, FLAC, M4A and more

Choose Audio File

Speed Control

📄 —
⏱ Original: —
💾 Size: —
1.0×
Playback Speed
New duration: —
0.25× (very slow)1× normal4× (very fast)
⚡ Browser preview uses native speed-change (pitch may vary).
Processing…

✅ Audio speed changed successfully!


Advanced Audio Speed Features

More than just playback — actual audio processing.

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Pitch Preservation

Time-stretch algorithm keeps the pitch the same while changing tempo — no chipmunk effect.

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Resample Mode

Classic resample also changes pitch — ideal for speed ramping effects and DJ use cases.

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Fine-Grained Control

Dial in any speed from 0.25× to 4× with the smooth slider or use preset buttons.

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100% Private

All processing happens locally in your browser. No files are uploaded to any server.

Simple Process

How to Change Audio Speed

1

Upload Audio

Drop any audio file — MP3, WAV, OGG, AAC and more.

2

Set Speed

Drag the slider or click a preset button. Preview the effect in real time.

3

Choose Algorithm

Pick time-stretch to preserve pitch, or resample to change both speed and pitch.

4

Download

Click Apply Speed and download your processed audio as a WAV file.

Frequently Asked Questions

What is the difference between resample and time-stretch?
Resample changes the playback rate like a tape — faster speed raises pitch, slower speed lowers it. Time-stretch changes the tempo while keeping the pitch constant, like professional audio software.
What speeds are supported?
0.25× (quarter speed, 4× longer) up to 4× (four times faster, quarter duration). You can also type custom values in the slider.
Will quality suffer at extreme speeds?
At very high speeds (3×–4×), speech becomes hard to understand and music loses clarity. At very slow speeds (0.25×–0.5×), time-stretch artifacts may be audible. The 0.5×–2× range gives the best results.
What format is the output?
WAV (16-bit PCM, lossless). This preserves the maximum quality after processing.

Change Audio Speed — Complete Guide

This free online change audio speed tool is designed to work entirely in your browser — no uploads, no waiting, no software installation needed. It's fast, private, and completely free to use without any account or subscription.

💡 1.25x for podcasts

Speeding podcasts up to 1.25x is a popular way to consume more content without losing comprehension.

💡 0.75x for learning

Slowing audio to 0.75x is helpful for language learning or transcription.

💡 Preserve pitch

Always enable pitch correction when changing speed — otherwise speech sounds unnatural.

💡 Test before export

Preview the result at different speeds before downloading to find the perfect balance.

Audio speed adjustment is used by students, language learners, podcast listeners, and musicians for productivity and practice.

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