Local by architecture
Audio decoding, sample processing, preview creation, and WAV export happen in your browser. There is no hidden media upload step in the current application.
Useful audio work.
Nothing to hand over.
SoundTools is a focused set of browser audio utilities. The goal is simple: make one real change to a recording, hear the result, and save it without sending the source file to someone else's server.
THREE OPERATING PRINCIPLES 01 02 03
Working before listed as live
A tool is marked Live only when the interface performs the advertised operation. Larger AI ideas remain Planned until their local experience is reliable enough to use.
Limits belong in the guide
Peak-safe gain is not loudness normalization. Variable speed is not pitch-preserving time stretch. Publishing those distinctions helps people choose the right tool.
AVAILABLE TODAY
Five tools, one local workbench
01 / GAIN↗02 / CUT↗03 / REV↗04 / RATE↗05 / HZ↗
Volume Booster
Raise loudness with peak-safe gain control and hear the result before exporting.
Audio Trimmer
Set precise start and end points on a readable waveform, preview, then export.
Reverse Audio
Reverse music, speech, or sound effects locally in one click.
Speed & Pitch
Slow down or accelerate a clip with natural linked pitch movement.
Tone Generator
Create sine, square, triangle, or saw tones from 20 Hz to 20 kHz.
WHAT “LOCAL” MEANS
The browser is the workshop
- 01
Read
You choose a compatible audio file. Browser APIs read it directly into memory and decode its channels and sample rate.
- 02
Process
A dedicated worker applies gain, trimming, reversal, resampling, or tone generation without sending sample data to an application server.
- 03
Preview and export
The page creates a temporary local preview and encodes a WAV for download. Closing the tab releases those in-memory results.