Audio Speed Changer Online
Speed up or slow down any audio file. Live preview, multiple formats, free and private.
Change Audio Speed Instantly
Load any audio file (MP3, WAV, FLAC, OGG) and adjust the playback speed. Preview the changes in real time using the Web Audio API — hear exactly how it sounds before exporting. Speed up to save time listening. Slow down to hear details. The Speed & Pitch tool gives you full control.
Common Speed Changes
• 1.25x — slightly faster, still natural-sounding. Good for speeding up lectures or podcasts. • 1.5x — noticeably faster. Popular for audiobooks and long recordings. • 2x — double speed. Good for quickly reviewing content you've heard before. • 0.75x — slightly slower. Helps with transcription and catching missed words. • 0.5x — half speed. Ideal for learning musical passages or studying pronunciation.
Speed vs Pitch
The tool offers independent speed and pitch control: • Change speed without changing pitch — the audio plays faster or slower but stays in the same key. This uses time-stretching. • Change pitch without changing speed — the audio stays the same length but shifts higher or lower. Useful for transposing music. • Change both — the classic vinyl/tape effect where speeding up also raises the pitch.
Try it now — free in your browser
No download. No signup. Your files never leave your device.
Open Speed & PitchFrequently Asked Questions
Time-stretching algorithms can introduce subtle artifacts, especially at extreme speeds (below 0.5x or above 2x). At moderate speeds (0.75x-1.5x), the quality is excellent and artifacts are generally inaudible.
Yes. The tool uses Web Audio's playbackRate for live preview. You hear the speed change in real time before committing to an export.