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Stretch or compress audio to a target duration
Details
Computes an atempo factor from the target length to stretch/compress while keeping pitch stable (within 0.25x–4x).
Execution
Fill in the form, run the tool, and review the result in one place.
Samples
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Ready for a run
Tool usage guide
The Audio Time Stretch tool adjusts audio duration without altering pitch. It calculates an atempo factor to stretch or compress audio to a target length, maintaining stable sound quality within a 0.25x to 4x speed range.
Background
A video editor has a 2-minute video clip but the audio track is 2 minutes 30 seconds long.
Problem
The audio needs to be shortened to match the video duration without changing the pitch.
How to use
Upload the audio file, set the target duration to 120 seconds, and choose MP3 as the output format.
Outcome
The audio is compressed to exactly 2 minutes, syncing perfectly with the video while maintaining original sound quality.
Background
A podcaster wants to produce a 30-minute highlights reel from a 60-minute interview.
Problem
Need to reduce the audio length to half without causing pitch distortion.
How to use
Upload the interview audio, set target duration to 1800 seconds (30 minutes), and output in WAV format.
Outcome
The audio is stretched to 30 minutes, creating a fast-paced summary with preserved clarity.
The tool accepts common audio formats such as MP3, WAV, AAC, and others via file upload.
No, the tool preserves pitch stability by using an atempo factor within the 0.25x to 4x range.
Target duration can be set from 0.5 seconds to 7200 seconds (2 hours).
Yes, audio files must be under 200 MB.
Yes, you can select from formats including MP3, AAC, M4A, OGG, Opus, FLAC, and WAV.