Free Online Audio Speed Changer
Speed up or slow down audio from 0.25x to 3x while keeping the original pitch. 100% browser-based — no upload, no watermark, no signup.
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Change Your Audio Speed
Upload an audio file, pick a playback speed, and download the adjusted result. Original pitch is preserved.
Drop your audio file here
or click to browse
MP3, WAV, OGG, FLAC, AAC, M4A and more
Features
Change Speed, Keep Pitch
From 0.25x to 3x playback with voices that still sound natural — no chipmunk, no deep-demon effect.
9 Speed Presets
0.25x, 0.5x, 0.75x, 1x, 1.25x, 1.5x, 2x, 2.5x, 3x — one click each.
Pitch Preserved
Smart time-stretching keeps the original key and tone intact.
Instant Preview
Compare original and adjusted side-by-side before downloading.
Perfect for Learners, Podcasters, Musicians
Save hours on long episodes, catch every word in a foreign language, or slow down a tricky passage to learn it note by note.
Podcast Listeners
Speed up hour-long episodes to 1.5x or 2x — save time on every commute.
Language Learners
Slow foreign-language audio to 0.75x or 0.5x to hear every syllable clearly.
Music Practice
Slow a complex passage to 0.5x to learn the notes, then speed back up as you improve.
100% Private & Free
Audio stays on your device. All processing runs right in your browser, on your own device.
No Server Upload
Files are never sent to any server — they stay on your device end-to-end.
Multiple Formats
Accepts MP3, WAV, AAC, OGG, FLAC, M4A and more. Export as MP3 or WAV.
Works Everywhere
Desktop, tablet, or phone — any modern browser handles it.
Loved by creators, students & researchers
Why people use BibiGPT to turn videos into text every day.
Trusted by 50,000+ users worldwide
“I paste a link and get clean captions in seconds — it saves me hours of retyping every single week.”
Maya R.
Content Creator · Repurposes short videos
“Exporting the transcript lets me review new words at my own pace instead of pausing the video constantly.”
Daniel K.
Language Learner · Studies with real videos
“Accurate, timestamped text I can quote directly. It has quietly become part of my daily workflow.”
Priya S.
Researcher · Cites public talks
FAQ'S
Frequently Asked Questions
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