⏩ Playback Speed (in-browser)
Drop an audio file, choose a speed, preview instantly, then export — all locally with FFmpeg WebAssembly.
No uploads • Private & fast
Drag & drop audio here
…or click to choose MP3 / WAV / M4A / OGG / FLAC / OPUS
Duration: — Mode: —
Idle
Help & FAQ — Playback Speed Changer
How to use
- Add an audio file (podcast, voice note, lecture, etc.).
- Set the speed, pitch mode, and export format.
- Preview the change, then export or share the processed audio.
Use cases
- Speed up lecture audio to review notes faster.
- Slow down practice tracks to learn tricky passages.
Tips & FAQs
- Can I keep the original pitch?
- Yes—choose the preserve pitch mode to stretch time without changing pitch.
- Why is export slower on large files?
- Long recordings need more processing time in the browser, especially on low-powered devices.
Formats & limits
- Input: audio files up to the limits of your browser memory
- Output: MP3, M4A, OGG, or WAV based on export settings
- Preview playback uses your device audio output
Privacy
All processing happens in your browser; files never leave your device.
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Updated
15 October 2025