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Free Audio Speed Changer

Speed up or slow down audio from 0.25× to 4×, with or without pitch change.

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How to use this tool

To change audio speed, choose a file, enter a speed from 0.25× to 4×, pick Keep pitch or Change pitch and press Create file to download the new MP3. Speed up a podcast or lecture to 1.5×, slow a song to 0.75× to learn a part, or make a sped-up or slowed song edit. Keep pitch holds voices and notes at their natural pitch; Change pitch moves pitch with speed, like a tape or a turntable.

  1. 01

    Choose the audio

    Click Choose files and pick an MP3, M4A, WAV or FLAC file, or a video with sound, up to 100 MB and 10 minutes.

  2. 02

    Set the speed

    Enter a speed from 0.25 to 4: 1.25–2 speeds up, 0.5–0.9 slows down. Choose Keep pitch for natural voices, or Change pitch for a chipmunk or deep slowed-down effect.

  3. 03

    Create and download

    Press Create file, listen to the new version and click Download to save the MP3.

Keep pitch vs change pitch

• Keep pitch: time-stretches the sound, so voices still sound like the speaker and songs stay in the same key; best for lectures, podcasts and practice • Change pitch: plays the sound faster or slower like a turntable, so pitch rises or falls with speed; the classic “sped up” and “slowed” song edits on TikTok and YouTube Doubling the speed with Change pitch raises the pitch by an octave.

Common speeds

• 0.5×: transcribing fast speech or learning a guitar solo note by note • 0.75×: practicing a song at a comfortable tempo • 0.8× with Change pitch: a slowed, deeper version of a song • 1.25× with Change pitch: a “sped up” TikTok or Reels edit • 1.5×: podcasts and lectures, still easy to follow • 2×: skimming long voice notes and recordings

Length after the change

The new length is the original divided by the speed. A 9-minute lecture at 1.5× lasts 6 minutes; a 3-minute song at 0.75× lasts 4 minutes. For music with Keep pitch, speeds from 0.5× upward sound the most natural. To match a song to a target tempo, measure its BPM with the tap BPM tool first.

Frequently asked questions

How do I speed up audio?

Choose the file, enter a speed above 1, such as 1.5, press Create file and download the MP3.

How do I slow down a song?

Enter a speed below 1, such as 0.75. Keep pitch holds the key; Change pitch makes it deeper as well.

Can I change speed without changing pitch?

Yes. Keep pitch is the default and keeps voices and notes at their original pitch.

How do I make a sped up or slowed song?

Choose Change pitch, then use about 1.25 for sped up or 0.8 for slowed.

What speed range is supported?

From 0.25× to 4×, with decimals such as 1.15.

Is my audio uploaded?

No. The speed is changed in your browser and the file stays on your device.

Can I change the speed of a video?

Yes, with the video speed changer, which keeps the picture. This tool saves the sound as an MP3.

How long can the audio be?

Up to 100 MB and 10 minutes per file.

What format is the result?

A 192 kbps stereo MP3 named after your file with the speed added, for example song-1_5x.mp3.

Is the audio speed changer free?

Yes. No signup and no limit.

For developers

Research podcasts and long-form audio on YouTube

Working with talks or podcasts? SocQ APIs return public YouTube videos, channels, transcripts and comments, so you can find topics and audience questions without listening through every episode.

Explore the API

youtube/videos

posts0.5 credits / result

youtube/channels

profiles0.26 credits / result

youtube/transcripts

posts0.5 credits / result

youtube/comments

comments0.3 credits / result

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