GAINLive
Effects
Volume Booster
Raise loudness with peak-safe gain control and hear the result before exporting.
MP3 · WAV · M4A · OGG
44 browser audio utilities / zero uploads
Free online audio tools.
Stay local.
Boost volume, tune or change a voice, generate speech, build a soundboard, add reverb, split stems, and more — 44 free online audio tools that run in your browser. No signup, no software, and no audio uploads.
SOURCE / LOCAL INPUT READY
01 / AUDIO LABEdit audio in one
Edit audio in one
browser workbench.
Boost volume, trim a clip, reverse audio, change speed, or generate a tone without switching pages. Preview the result and export a clean WAV.
Local audio labFiles never leave this tab
00:00LOCAL BUFFER--:--
Preview controls appear after you add or generate audio.
02 / TOOL INDEX44 free audio
44 free audio
& voice tools.
Edit and convert audio, clean recordings, separate vocals and stems, transcribe speech, detect BPM, or create responsive music visuals — all on your device.
CUTLive
Edit & convert
Audio Trimmer
Set precise start and end points on a readable waveform, preview, then export WAV or MP3.
MP3 · WAV · M4A · OGG input
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
TUNELive
Voice & AI
Autotune
Correct a monophonic vocal toward a chromatic, major, or minor scale without uploading it.
Voice input · WAV output
TTSLive
Voice & AI
Text to Speech
Generate an English AI voice in your browser and download the result as MP3 or WAV.
English text · MP3 · WAV
PADLive
Create & analyze
Soundboard
Load, trim, trigger, save, and export a custom soundboard entirely on your device.
12 pads · Keyboard control
VERBLive
Effects
Reverb
Add room, hall, plate, or cathedral reverb with an offline browser render.
Room · Hall · Plate · Cathedral
VOICELive
Voice & AI
Voice Changer
Create deep, chipmunk, robot, telephone, monster, or custom pitch voices locally.
Five presets · WAV output
FMTLive
Edit & convert
Audio Converter
Convert common audio formats without sending the source to a server.
MP3 · WAV · FLAC · AAC
JOINLive
Edit & convert
Audio Joiner
Reorder clips, add short crossfades, and export a single clean timeline.
MP3 · WAV · M4A
DENOISELive
Voice & AI
Noise Remover
Reduce room noise, hiss, and low-level background texture in recordings.
Local AI model
STEMLive
Voice & AI
Vocal Remover
Create instrumental and vocal stems using an on-device separation model.
Local AI model
4×Live
Voice & AI
Stem Splitter
Separate vocals, drums, bass, and instruments into individual tracks.
Local AI model
TXTLive
Voice & AI
Speech to Text
Transcribe interviews, voice notes, and lectures with local-first speech recognition.
TXT · SRT · VTT
BPMLive
Create & analyze
BPM Detector
Estimate tempo and display a confidence range for music and loops.
Music analysis
VISLive
Create & analyze
Music Visualizer
Turn frequency and amplitude data into exportable responsive visuals.
MP4 · WebM
EQ10Live
Effects
Audio Equalizer
Use a 10-band equalizer with practical presets, A/B comparison, and peak-safe local export.
10 bands · WAV · MP3
8DLive
Effects
8D Audio
Create a stereo orbit with adjustable cycle, depth, and optional room reverb.
Stereo WAV · MP3
BASSLive
Effects
Bass Booster
Boost 60–250 Hz with a low-shelf filter and automatic peak protection.
60–250 Hz · WAV · MP3
NIGHTLive
Effects
Nightcore Maker
Apply the familiar linked speed-and-pitch effect with a clear 1.05×–1.5× rate control.
1.05×–1.5× · WAV · MP3
NREVLive
Effects
Nightcore Reverse
Build a linked Nightcore edit and reverse the finished sample timeline locally.
Linked pitch · Reverse · WAV
SLOWLive
Effects
Slowed + Reverb
Slow audio with linked lower pitch, then blend an adjustable algorithmic reverb.
0.6×–0.95× · Reverb
FASTLive
Effects
Sped Up Audio
Speed up audio from 1.05× to 2× with pitch preservation on by default.
1.05×–2× · WAV · MP3
CLIPLive
Effects
TikTok Slowed Audio
Slow a local file, choose a 15, 30, or 60 second section, and add clean fades.
15s · 30s · 60s clips
VAPORLive
Effects
Vaporwave Maker
Combine linked slowdown, low-pass color, reverb, and adjustable wow/flutter.
Slow · Filter · Wow · Reverb
CLONELive
Voice & AI
Voice Cloning
Generate a short, watermarked speech sample from an authorized reference voice using local WebGPU inference.
Short English speech · WAV
V2ILive
Voice & AI
Voice to Instrument
Track a monophonic voice, quantize its notes, and render piano, guitar, strings, or synth locally.
WAV · MIDI
SONGLive
Voice & AI
Speech to Song
Quantize a short spoken phrase into a key and add a simple local accompaniment.
Key · Scale · BPM · WAV
COVERLive
Edit & convert
FLAC Cover Art
Preview, replace, or remove FLAC cover art while copying the audio stream without re-encoding.
FLAC · JPEG · PNG · WebP
TAGSLive
Edit & convert
Audio Metadata Editor
Read and update title, artist, album, date, track, genre, comment, and cover art locally.
Tags · Artwork · Stream copy
PITCHLive
Edit & convert
Pitch Shifter
Shift audio by semitones while preserving the original duration with a local FFmpeg filter chain.
−12 to +12 semitones
TEMPOLive
Edit & convert
Tempo Changer
Slow down or speed up audio from 0.5× to 2× while keeping musical pitch stable.
0.5×–2× · Pitch preserved
V2ALive
Edit & convert
Video to Audio
Convert a local video file into MP3, WAV, FLAC, or M4A without a URL downloader or upload.
MP4 · MOV · WebM · MKV
BEATLive
Create & analyze
Beat Maker
Build six-track drum patterns with swing, velocity, mute, solo, and local audio export.
6 tracks · 16 steps · WAV · MP3
GRAINLive
Create & analyze
Granular Synthesizer
Resynthesize a local sample with grain size, density, position, spray, pitch, reverse, filter, and reverb controls.
Sample input · Live record WAV
HEARLive
Create & analyze
Hearing Test
Check relative left and right audibility from 250 Hz to 8 kHz with safe calibration and a results chart.
250 Hz–8 kHz · Left / right
RECLive
Create & analyze
Audio Recorder
Record a microphone locally with a live level meter, pause and resume, private preview, and WAV or MP3 download.
Microphone · WAV · MP3
MICLive
Create & analyze
Microphone Test
Check a microphone with live dBFS level, peak headroom, waveform, device diagnostics, room-noise measurement, and a local playback sample.
Microphone · dBFS · WAV sample
NORMLive
Effects
Audio Normalizer
Measure Integrated LUFS, RMS, and sample peak, then normalize locally with an adjustable peak ceiling.
LUFS · RMS · Peak · WAV · MP3
COMPLive
Effects
Audio Compressor
Shape dynamic range with threshold, ratio, attack, release, soft knee, and makeup gain, then export WAV or a smaller MP3.
Dynamics · 64–192 kbps MP3 · WAV
FADELive
Effects
Fade In / Fade Out
Set separate fade-in and fade-out times, choose musical curve shapes, preview the envelope, and export locally.
4 curves · WAV · 192 kbps MP3
SPLITLive
Edit & convert
Split Audio
Divide audio into equal parts, fixed intervals, or custom timecodes, preview every segment, and download individual files or one ZIP.
3 split modes · WAV · MP3 · ZIP
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03 / HOW IT WORKS Edit, preview, and export
Edit, preview, and export
in three steps.
- 01↳
Choose audio
Open a file from your device. Your browser decodes it directly into memory instead of uploading it to a server.
- 02⌁
Adjust the result
Use focused controls to cut, boost, convert, clean, separate, analyze, or transform the sound.
- 03↓
Preview and download
Listen before saving, make another adjustment if needed, then download the finished file 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 upload endpoint
- ✓AI provenance watermark retained where required
05 / QUESTIONS
About our free audio tools.
Quick answers about privacy, supported formats, local AI, and using SoundTools on mobile.
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 and export?
Browser support varies, but common MP3, WAV, M4A, AAC, OGG, and FLAC inputs work across the toolkit. Output choices depend on the tool and include WAV, MP3, FLAC, M4A, WebM, MP4, TXT, SRT, and VTT.
03Do the AI tools upload my audio?
No. RNNoise runs in WebAssembly, while Whisper and Demucs run through local WebGPU inference. Those tools download runtime or model assets, but the selected audio remains inside the tab.
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.