Private on your device
mp3cut.inAudio tools
Free Online MP3 Speed & Tempo Adjustment Tool

Audio Speed Changer — Slow Down or Speed Up Audio

Change playback speed for a compatible audio file. This browser tool changes pitch with speed, then downloads the result as a WAV file.

Audio Speed & Pitch Changer

Speed up or slow down compatible audio. Changing speed also changes pitch (0.25x to 2.5x).

Why Use mp3cut.in Speed Changer?

0.5x to 2.0x Presets: Quickly switch between 0.5x (Slow Mo), 1.25x (Fast), 1.5x (Podcast), and 2.0x (Double).
Custom Multiplier Slider: Fine-tune speed with 0.05x precision increments.
Browser preview: Listen to a speed setting before exporting the WAV file.
Zero File Uploads: Audio stays 100% private inside your browser memory.
0.5x Slow Motion

Slow down fast guitar solos, piano riffs, or foreign language pronunciation drills to practice note-by-note.

1.25x Nightcore Remix

Create energetic Nightcore songs by slightly increasing beat tempo and pitch.

1.5x Podcast Speed

Review long audiobooks, university lectures, and podcast episodes more quickly; pitch also changes at this speed.

2.0x Double Speed

Rapidly scan meeting voice notes or interview transcripts in half the time.

Related audio tools

Choose a separate tool when your editing task needs more than trimming or format-compatible WAV output.

Frequently Asked Questions (FAQ)

Audio Speed Changer FAQs

Questions about changing MP3 speed, tempo, and playback rate.

Upload your audio track into the Speed Changer, select a preset like 0.5x (slow mo), 1.25x, 1.5x, or 2.0x, or drag the speed slider, then play or download the modified file.
The presets change playback rate. They can be useful for review, but this tool does not preserve pitch, so speech and music will sound higher or lower at changed speeds.
Yes! Setting the playback speed to 1.25x or 1.5x speeds up tempo and creates the iconic Nightcore music effect.
mp3cut.in uses Web Audio API playback rate adjustments to maintain smooth audio waveform reproduction.