Audio Tools

Online Audio Speed Changer — Slow or Fast Playback

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Change audio speed online for practice, skimming, or timing fixes. Slow podcasts and lessons or speed voice notes with live preview, then export MP3 or WAV privately in your browser — no account required.

Audio Speed Changer

Slow practice tracks or skim long clips with smooth playback-rate controls.

or drop a file here

MP3, WAV, OGG, M4A, AAC, FLAC, or WebM — up to 100 MB. Processing stays in your browser.

Load a recording, open Speed, and set a slower or faster playback rate while you listen. Ideal for music practice, language study, and shortening long voice messages before you share.

How to change audio speed online

Playback rate controls how fast the clip runs. Lower rates stretch time for practice; higher rates compress duration for skimming. This tool previews rate live, then exports with your chosen settings.

  1. Upload a file — MP3, WAV, and other browser-decodable formats work.
  2. Open Speed — the Speed panel is selected automatically on this page after you load audio.
  3. Dial the rate — preview while playing. Combine with Pitch separately if you need speed and pitch to move independently.
  4. Export — save the result. Processing stays on your device.

Speed vs pitch

Classic tape-style speed changes also shift pitch. This editor separates Speed (rate) from Pitch (semitone shift with tempo-preserving processing). Use Speed alone when you mainly care about duration. Open the Audio Pitch Changer when you need a higher or lower key without racing the beat.

Good use cases

  • Slow guitar or piano practice tracks without leaving the browser.
  • Speed lecture or meeting recordings to find a section faster, then trim.
  • Fit a voiceover into a fixed video slot by nudging rate slightly.
  • Shorten WhatsApp-style voice notes before attaching them elsewhere.

Tips for clean results

  • Extreme rates can sound unnatural — try modest changes first (for example 0.8×–1.25×).
  • Trim silence before speeding up so you do not amplify long gaps.
  • Export WAV for another round of editing; use MP3 for sharing.

Privacy

Rate preview and export run locally. Files are not uploaded to ShoutingNow for speed processing.

Common questions

Quick answers before you start calculating.

Use a modest Speed change for duration, and keep Pitch at Natural (center) if you want the original key. For key changes without tempo drift, use the Pitch Changer tool instead of extreme rate alone.