Audio Stretcher Online
Stretch or compress audio duration and playback speed from 50% to 200%. Real-time duration estimation and uncompressed WAV export.
The Audio Stretcher Online gives creators granular control over audio timing and total track duration. Decelerate fast instrumental solos for detailed practice, compress podcast lectures for rapid listening, or stretch ambient music into lush soundscapes without changing original pitch.
Clean Time Expansion and Duration Compression
Retain acoustic attack clarity and vocal intelligibility across extreme speed factors.
Duration Timecode Preview
Watch the estimated track duration recalculate in real time as you adjust the slider, letting you hit exact time constraints for video sync and broadcast cues.
50% to 200% Dynamic Range
Whether you need subtle 5% speed adjustments or extreme 50% half-speed slowdowns for instrument transcription, audio remains crisp and intelligible.
Lossless Local Export
Download pristine 16-bit PCM WAV audio files rendered directly inside your client browser without waiting on cloud server rendering pipelines.
When to Use the Audio Stretcher
A critical utility for musicians, transcribers, video editors, and choreographers.
Learning Fast Virtuoso Solos
Slow down blistering guitar solos, bebop saxophone runs, or double-bass passages to 50% or 75% speed to transcribe note-for-note without pitch dropping.
Fitting Background Music to Video Timing
Stretch or compress a 30-second commercial jingle by 1-2 seconds to align musical cues perfectly with video scene transitions and cut points.
Dance Rehearsal Pacing
Stretch music duration by 20% to give dancers extra time to land complex acrobatic maneuvers during early rehearsal stages before stepping up to full performance speed.
Speech & Interview Transcription
Journalists and legal transcribers can slow down fast-paced court recordings or mumbled interviews to ensure 100% transcript precision.
Explore Related Tempo & Practice Tools
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Beat BPM Changer
Input exact source and target BPM numbers with genre tempo calculators.
Music Practice Pitch Changer
Practice songs at your ideal musical key without tempo changes.
Transpose Track Online
Chromatic pitch shifter for tracks and audio stems online free.