Does changing audio speed alter the vocal pitch?

No. YupVox utilizes pitch-preserved time-stretching algorithms to keep original voice pitch natural even at 2x or 3x speed.

Can I use this tool to slow down podcasts or language lessons?

Yes! Slowing down audio to 0.75x or 0.5x makes fast-paced speech, lectures, and foreign language lessons easy to understand.

Is the Audio Speed Changer completely free?

Yes, 100% free with no file limits, no registration required, and unlimited exports.

Are my audio files uploaded to a remote server?

No. All processing happens locally in your web browser. Your private audio tracks never leave your computer.

Gratis · No Installation

Audio Speed Changer

Speed up or slow down audio files from 0.25x to 3.0x without changing vocal pitch — 100% free and in-browser.

Upload audio file or drag & drop here

Supports .mp3, .wav, .m4a, .ogg, .flac formats

Key Features

0.25x – 3.0x Speed Range

Flexible tempo control from ultra-slow study pace to 3x fast-forward speed.

Pitch-Preserved Time Stretching

Advanced algorithm preserves natural voice pitch without chipmunk distortion.

Instant In-Browser Preview

Real-time playback preview before downloading with zero quality degradation.

How to Use

Upload audio or song file

Select or drag & drop any MP3, WAV, M4A, OGG, or AAC audio file.

Adjust speed multiplier

Drag the speed slider from 0.25x (slow motion) to 3.0x (high speed).

Export & download

Click Change Speed to instantly download your processed audio file.

Online Audio Speed Changer — Speed Up & Slow Down MP3 Free

Looking to speed up podcast lectures and audiobooks to save study time, or slow down songs and foreign language recordings to master pronunciation without high-pitch distortion? YupVox Free Online Audio Speed Changer lets you speed up or slow down MP3 and audio files from 0.25x to 3.0x with pitch-preserved time stretching — 100% free with zero software installation.

Why Choose YupVox Online Audio Speed Changer?

Flexible 0.25x to 3.0x Tempo Control

Flexibly adjust playback speed from 0.25x slow motion to 3.0x fast-forward mode with millisecond accuracy.

Pitch-Preserved Time Stretching

Changes playback tempo while preserving natural voice frequency without chipmunk pitch distortion.

Instant In-Browser Engine

Processes audio in real-time inside your browser without uploading large files to cloud queues.

Universal Format Compatibility

Seamlessly works with MP3, WAV, AAC, M4A, OGG, FLAC and exports high-bitrate audio files.

How to Change Audio Speed Online in 3 Simple Steps

STEP 1

Upload your audio file: Drag & drop or select your MP3, WAV, or AAC audio file.

STEP 2

Adjust the speed slider: Drag the speed multiplier slider (e.g. 1.25x, 1.5x, or 0.75x) and press Play to preview.

STEP 3

Export & download: Click Download to instantly save your speed-adjusted audio file.

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Frequently Asked Questions

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