Adjust Audio Speed Online

Upload an audio file and choose a playback speed. Values below 1.00× slow the audio down, values above 1.00× speed it up. Pitch is preserved for a natural sound.

Files are processed automatically and are not stored permanently. Works on Windows, macOS, Linux, Android and iOS.

Note: Processing may take up to 2 minutes depending on file length.

Online Audio Speed Changer (Time-Stretch)

ToolsToday audio speed changer is a free online tool that lets you speed up or slow down audio while preserving pitch. This is also known as time-stretching, and it helps keep voices and instruments sounding natural even when the playback speed changes.

Use this tool to listen to podcasts and lectures faster, slow down music for practice, or adjust voice notes for better clarity. Upload your file, choose a speed between 0.50× and 2.00×, and download the processed result instantly — no software installation and no registration required.

Recommended speed values

0.75× — slower for learning and instrument practice
1.25× — comfortable faster listening for podcasts
1.50× — faster lectures and audiobooks (still understandable)
2.00× — maximum speed for quick review

When Should You Change Audio Speed?

Listen to podcasts, audiobooks and lectures faster to save time

Slow down music tracks to practice instruments or learn complex parts

Adjust the speed of voice recordings for clarity and better comprehension

Create creative audio effects for videos, social media or sound design

Speed up or slow down audio without changing the original pitch

Best Use Cases

Podcasts & audiobooks — 1.25× to 1.50× for faster listening

Music practice — 0.75× to 0.90× to learn difficult parts

Voice notes — slight speed changes to improve clarity

Content creation — creative time-stretch effects for edits

Privacy & Security

Your file is used only to change speed and generate the result

Files are processed automatically and not stored permanently

No signup required — change speed anonymously