Audio Adjuster
Change volume, speed, pitch, or playback direction in one pass with FFmpeg.
This tool bundles four common audio edits - volume, speed, pitch, and reverse playback - into one FFmpeg pass that runs entirely in your browser via WebAssembly. Speed changes use tempo adjustment rather than simple resampling, so playback rate and pitch are controlled independently: speed it up without a chipmunk effect, or shift pitch in semitones without changing duration. The result is always exported as MP3 for broad compatibility across the accepted source formats.
Loading tool
How it works
- 01
Drop or select an audio file.
- 02
Adjust volume, speed, pitch, or toggle reverse as needed.
- 03
Click Process and download the adjusted MP3.
Details
- Category
- Audio
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-03
Common questions
Does changing speed alter pitch?
No. Speed uses tempo adjustment. Pitch is controlled independently in semitones.
Why is the output MP3?
MP3 provides a compact, widely supported result across the accepted source formats.
Can I combine multiple adjustments at once?
Yes - volume, speed, pitch, and reverse are all applied together in a single FFmpeg pass.
Does it upload my audio?
No - processing runs locally with WebAssembly. Nothing leaves your browser.