GAINLive
Effects
Volume Booster
Raise loudness with peak-safe gain control and hear the result before exporting.
MP3 · WAV · M4A · OGG
Private audio utilities / zero uploads
Private audio tools.
Stay local.
Trim, reverse, boost, and generate audio with free online tools that run inside your browser. No account, no media upload, no detour.
SOURCE / LOCAL INPUT READY
01 / AUDIO LABOne workbench.
One workbench.
Five useful tools.
Drop a file once, move between edits, and export a clean WAV. Processing happens in a dedicated browser worker.
Local audio labFiles never leave this tab
00:00LOCAL BUFFER--:--
Preview controls appear after you add or generate audio.
02 / TOOL INDEX
Find the right move.
Five tools are ready now. More local-first utilities are being built in the open.
CUTLive
Edit & convert
Audio Trimmer
Set precise start and end points on a readable waveform, preview, then export.
MP3 · WAV · M4A · OGG
REVLive
Effects
Reverse Audio
Reverse music, speech, or sound effects locally in one click.
MP3 · WAV · M4A · OGG
RATELive
Effects
Speed & Pitch
Slow down or accelerate a clip with natural linked pitch movement.
MP3 · WAV · M4A · OGG
HZLive
Create & analyze
Tone Generator
Create sine, square, triangle, or saw tones from 20 Hz to 20 kHz.
WAV output
FMTPlanned
Edit & convert
Audio Converter
Convert common audio formats without sending the source to a server.
MP3 · WAV · FLAC · AAC
JOINPlanned
Edit & convert
Audio Joiner
Reorder clips, add short crossfades, and export a single clean timeline.
MP3 · WAV · M4A
DENOISEPlanned
Voice & AI
Noise Remover
Reduce room noise, hiss, and low-level background texture in recordings.
Local AI model
STEMPlanned
Voice & AI
Vocal Remover
Create instrumental and vocal stems using an on-device separation model.
Local AI model
4×Planned
Voice & AI
Stem Splitter
Separate vocals, drums, bass, and instruments into individual tracks.
Local AI model
TXTPlanned
Voice & AI
Speech to Text
Transcribe interviews, voice notes, and lectures with local-first speech recognition.
TXT · SRT · VTT
BPMPlanned
Create & analyze
BPM Detector
Estimate tempo and display a confidence range for music and loops.
Music analysis
VISPlanned
Create & analyze
Music Visualizer
Turn frequency and amplitude data into exportable responsive visuals.
MP4 · WebM
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03 / HOW IT WORKS From file to finished,
From file to finished,
without a detour.
- 01↳
Open your file
The browser decodes it directly into memory. There is no upload step hiding in the background.
- 02⌁
Make the change
Readable controls and a responsive waveform keep the important decision in front of you.
- 03↓
Listen, then export
Preview the processed result, adjust if needed, and save a standard WAV to your device.
04 / PRIVATE BY DESIGN
Your audio is not our data.
SoundTools has no file upload endpoint. Your browser reads the source, performs the edit locally, and creates the downloadable result on your device.
- ✓No account or personal profile
- ✓No media storage bucket
- ✓No watermark in exported audio
05 / QUESTIONS
Before you press play.
Simple answers about files, formats, and what happens inside the browser.
01Are my audio files uploaded?
No. The included tools decode and process your file inside the browser tab. There is no upload endpoint in this version of SoundTools.
02Which formats can I open?
Browser support varies, but modern Chrome and Safari generally decode MP3, WAV, M4A, AAC, and OGG. The first release exports lossless WAV.
03Why are some tools marked Planned?
AI separation and transcription require larger local models. They stay clearly labelled until their experience and privacy guarantees are ready.
04Does it work on phones?
Yes. The interface adapts to small screens, though very large audio files may exceed the memory available to a mobile browser.