Free Online Audio Speed Changer
Speed up or slow down any audio file without changing pitch. Upload, adjust speed, preview, and download — all in your browser.
Coming soon · Join the betaComing soon
This tool is currently in development. Download our desktop app for full functionality.
Download Desktop AppHow it works
Upload an audio file (MP3, WAV, OGG, FLAC)
Set the desired speed (0.25x to 4x)
Preview the speed-adjusted audio
Download the result as a WAV file
What's included
Variable Speed
Adjust playback speed from 0.25x (quarter speed) to 4x. Perfect for transcription, practice, and time-saving.
Pitch Preservation
Change speed without changing pitch. Time-stretch processing keeps voices and music sounding natural at any speed.
100% Private
All processing happens in your browser. No audio is uploaded to any server.
Who is this for?
Podcast Speed-Listening
Speed up podcasts and audiobooks to 1.5x-2x to consume more content in less time without losing comprehension.
Music Practice
Slow down fast passages to learn them note by note, then gradually increase speed as you improve.
Transcription
Slow down recordings to 0.5x-0.75x for easier manual transcription of interviews and meetings.
Language Learning
Slow down native-speaker audio to catch every syllable, or speed up your own recordings to test comprehension at natural pace.
Speed Up or Slow Down Audio — Free, No Download
This audio speed changer uses time-stretch processing to alter playback speed without changing pitch. Unlike simply changing the sample rate (which makes audio sound like a chipmunk when sped up), time-stretching preserves the natural tone and pitch of voices and instruments. Speed up podcasts for faster listening, slow down music to learn difficult passages, or adjust interview recordings for easier transcription. Supports MP3, WAV, OGG, FLAC, and most audio formats. All processing happens locally in your browser.
Frequently asked questions
Can I change speed without changing pitch?
Yes — this is the core feature. The tool uses time-stretching algorithms to maintain the original pitch while changing the playback speed. A voice sped up to 2x still sounds natural, not like a chipmunk.
What speed range is available?
From 0.25x (four times slower) to 4x (four times faster). Common settings: 0.5x for detailed listening, 1.5x for podcast speed-listening, 2x for transcription review.
Is this free?
Yes, completely free with no file size limits. No signup required.
Can I speed up podcasts?
Does it work with music?
What is the difference between this and pitch changing?
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