Separate songs into vocals, drums, bass, and other stems with on-device AI.
On-device AI 38 TOOLS · NOTHING UPLOADED
Free Online Audio Tools, Built Into Your Browser
36 browser-based audio tools plus 2 experiments cover editing, effects, voice AI, and music creation. Nothing uploads, nothing to install, and everything runs on your device.
AUDIO LAB / SIGNAL BENCH ON-DEVICE
Late night, early ideasORIGINAL DEMO · 120 BPM · STEREO
00:0820 Hz 1001k10k20 kHz
Popular tools
START HEREMake karaoke tracks and isolated vocals with AI or Classic center-cancel mode.
Karaoke & acapellaReduce hiss, hum, and steady background noise from recordings on-device.
Spectral cleanupConvert MP3, WAV, FLAC, OGG, Opus, M4A, and AIFF in your browser. Batch to ZIP, free.
Batch conversion8-band parametric EQ with live spectrum analysis and vocal, podcast and mix presets.
8-band parametricChange the pitch of a whole track by semitones and cents without touching the tempo.
±12 semitonesAll audio tools 38
FILTER, SEARCH, SAVE8-band parametric EQ with live spectrum analysis and vocal, podcast and mix presets.
8-band parametricClassic linked speed and pitch, or Independent mode, free nightcore edits.
Speed + pitchSlow, lower-pitch daycore edits with linked or independent pitch and reverb.
Slow + deepLinked or keep-pitch slowdown with adjustable reverb and style presets.
Slow & spaciousSpeed up songs with keep-pitch or linked pitch, plus a BPM helper, free.
Pitch-locked speedZero-shot AI voice cloning from a short reference clip, entirely on-device.
On-device AIPitch-correct a vocal to a key and scale, from subtle to a hard tune effect.
Pitch correctionTurn a hummed melody into notes, an instrument sound, and an exportable MIDI file.
Hum → MIDIReduce hiss, hum, and steady background noise from recordings on-device.
Spectral cleanupSeparate songs into vocals, drums, bass, and other stems with on-device AI.
On-device AITranscribe audio or video to text and export TXT, SRT, or VTT subtitles.
On-device WhisperTune your spoken voice to a key and arrange it over a generated backing track.
Voice + backingMake karaoke tracks and isolated vocals with AI or Classic center-cancel mode.
Karaoke & acapellaConvert MP3, WAV, FLAC, OGG, Opus, M4A, and AIFF in your browser. Batch to ZIP, free.
Batch conversionMerge up to 50 clips with crossfade, gain, and loudness matching. Exports one file.
Arrange & crossfadeCut, trim, or remove any section of an audio file with millisecond precision.
Precise selectionAdd, replace, or remove FLAC album art. Audio frames stay byte-for-byte identical.
Lossless tag editEdit tags and cover art for MP3, FLAC, M4A, OGG, WAV. Audio stays untouched.
Tags & artworkChange the pitch of a whole track by semitones and cents without touching the tempo.
±12 semitonesChange playback speed from 25-300%, keep pitch fixed, and set an exact target BPM.
25–300% speedExtract audio from MP4, MOV, MKV, WebM, or AVI files. Original stream or MP3, WAV, FLAC.
Track extractionGrain-based synthesizer for ambient textures, drones, and glitch sound design.
Texture engineTone and sweep generator with a speaker test and an informal hearing range check.
Tones & sweepsAudio-reactive visualizer with 5 styles, title overlay, and video export.
Audio-reactive videoHarsh-noise and distortion playground with a capped delay and panic stop.
Experimental FXNo tools found
Try “pitch”, “voice” or “convert”.
Why your browser is the studio now
Every tool on Audio Lab runs inside your browser tab using the Web Audio API and, for a handful of AI tools, WebAssembly and WebGPU. There is no server doing the work and no file leaving your computer. You open an audio file, adjust a few controls, and hear the result immediately, because the processing happens on the same machine you are sitting at.
That has a practical upside beyond privacy: no queue, no upload progress bar, and no waiting for a render to come back from somewhere else. Most tools offer a live preview, so turning a knob changes what you hear while the track is still playing. Once a page and its assets are loaded, the audio math does not depend on your connection speed.
What you can do, by task
Audio Lab groups its 36 core tools, plus 2 lab experiments, around what you are actually trying to do rather than around technical categories nobody searches for. Four groups cover almost everything:
- Edit and convert files — trim, join, convert between formats, extract audio from video, or fix tags and artwork with the audio editing tools, including the audio converter, audio trimmer, and audio joiner.
- Shape and stylize sound — sculpt tone, add space, or build a speed-and-pitch aesthetic with the audio effects group: the online EQ, bass booster, reverb, and volume booster.
- Clean up, separate, or generate voice — isolate vocals, remove noise, clone a voice, or turn text into speech with the voice tools: vocal remover, stem splitter, noise remover, and text to speech.
- Build and analyze music — program a beat, find a BPM, or check your hearing range with the music creation tools: beat maker, BPM detector, and soundboard.
How the AI tools work on-device
A few tools — stem splitter, vocal remover in AI mode, voice cloning, text to speech, and speech to text — use real machine-learning models instead of simple signal processing. Those models run in your browser through WebGPU where it is available, falling back to WebAssembly otherwise. Nothing about the audio or text you type is sent anywhere for inference; the model just needs to be on your machine first.
The first time you use one of these tools, your browser downloads the model from Hugging Face or jsDelivr and caches it. Sizes vary: the stem-splitting model is around 172 MB, text to speech is about 90 MB, and voice cloning's model is over 1 GB, so that first run takes longer than a normal page load. After that, the browser reuses the cached copy, so later visits start right away unless you clear site data. Desktop Chrome or Edge give the most consistent results for the heavier models; phones and older laptops can be slow or run out of memory on the largest ones.
Privacy by construction, not by policy
There is no account to create, and no file ever leaves your device, so there is nothing for Audio Lab to store on a server in the first place. Presets, favorites, and Studio settings live in your browser's local storage. Audio you hand from one tool to another with Continue in another tool is kept in IndexedDB on your device, not uploaded anywhere in between. You can clear any of it from your browser's own site-data controls whenever you want.
The exception is the one-time model downloads described above: fetching a model file from Hugging Face or jsDelivr is a normal network request, so those services see standard request data like your IP address, the same as loading any other web page. They never receive your audio or the text you type.
Formats and export options
Most tools decode whatever your browser can play — MP3, WAV, FLAC, OGG/Opus, M4A/AAC, AIFF, and WebM are typical — at the file's original sample rate. The audio converter, video to audio, and metadata tools go further using an embedded FFmpeg engine, which also accepts WMA, MKV, MOV, AVI, and other containers.
When you are done, Render preview and export to WAV (16-bit, 24-bit, or 32-bit float), MP3 (128–320 kbps), FLAC, OGG Vorbis, Opus, M4A (AAC), or AIFF, choosing the sample rate and channel count you need. Every render shows sample peak, integrated loudness (LUFS), and true peak (dBTP) afterward, and output is limited so it never clips above 0 dBFS. The one hard limit is 150 MB per input file — your device's own memory can be a lower ceiling than that for the AI tools.
Popular workflows
A single tool rarely finishes the job on its own. Continue in another tool passes your processed audio straight to the next step without a re-upload, so these chains take a few minutes end to end:
- Clean up a podcast: run noise remover to strip hiss and hum, shape the voice with the EQ, then bring it to a consistent level with the volume booster's loudness normalize mode.
- Make a karaoke track: pull the vocal out with vocal remover, then reach for the pitch shifter if you need the instrumental in a different key for a singer.
- Remix a song: split it into stems with the stem splitter, adjust the tempo of the parts you keep with the tempo changer, and stitch new sections together in the audio joiner.
Frequently asked questions
Is Audio Lab actually free to use?
Yes. Every tool is free, with no sign-up, no watermark, and no payment. You open a file, adjust settings, and download the result.
Do I need to create an account?
No. There are no accounts on Audio Lab. Presets and settings you save stay in your own browser's local storage, not on a server tied to a login.
Is my audio uploaded anywhere?
No. Processing happens on your device using your browser's own audio engine. The only network requests are for the page itself and, for a few AI tools, a one-time model download — never your audio file.
What audio formats does Audio Lab support?
Most tools accept anything your browser can decode, typically MP3, WAV, FLAC, OGG/Opus, M4A/AAC, AIFF, and WebM. The audio converter and video tools accept more formats, including WMA, MKV, MOV, and AVI, through an embedded conversion engine.
Is there a file size limit?
Yes, 150 MB per file. Your device's available memory can be a tighter limit than that, especially for AI-based tools like stem splitter or voice cloning on a phone or an older laptop.
Will Audio Lab work on my phone?
The editing and effects tools generally work fine on mobile browsers. AI tools that download a large model, such as voice cloning or stem splitter, can be slow or run out of memory on a phone; a desktop browser gives more headroom.
Which browser should I use?
Any modern browser handles most tools. For the AI tools, desktop Chrome or Edge give the most consistent performance because they support WebGPU; other browsers fall back to a slower WebAssembly path that still works.
How can an AI tool run without uploading my file, if AI usually needs a server?
The model itself downloads to your browser once and runs locally from then on using WebGPU or WebAssembly. Your audio or text is processed by that local copy of the model, so it never has to travel anywhere for the AI part to work.
Why did a tool pause to download something the first time I used it?
A handful of tools use real machine-learning models — for stem separation, voice cloning, text to speech, and speech to text — and those models have to be fetched once before they can run. The browser caches the file afterward, so it is a one-time wait per device.
Can I use Audio Lab offline?
Once a tool's page and any model it needs have loaded and cached, most processing does not need an active connection. Loading a tool for the first time, or one whose model has not been cached yet, does need the internet.
Will my audio sound as good as desktop software?
The underlying math — filters, time-stretching, pitch shifting — runs the same way it would anywhere. Results depend more on your settings and source material than on the fact that it is running in a browser. Some tasks, like separating stems or correcting pitch, have honest limitations no software fully escapes, and each tool page explains them.
I don't know which tool I need. Where should I start?
Pick the hub that matches your goal: audio editing for trimming and converting, audio effects for reverb, EQ, and speed styles, voice tools for vocals and AI voice work, or music creation for beats and analysis. Each hub has a short chooser to point you to a specific tool.
Latest guides
Music & remixingChange a Song's Key Without Changing Tempo
Change a song's key without changing tempo: the semitone math, fine-tuning with cents, and why extreme shifts change how a voice sounds.
6 min read · Updated September 25, 2026Voice & cleanupReduce Background Noise in a Recording Without Damaging SpeechReduce background noise in a recording without damaging the speech underneath it. Profile the noise, clean it conservatively, then check what you removed.
6 min read · Updated September 25, 2026Music & remixingHow to Crossfade Two SongsCrossfade two songs into one smooth transition. Learn equal-power vs. linear curves, how long a crossfade should be, and why to match loudness first.
5 min read · Updated September 25, 2026Music & remixingExport Stems to a DAW, Sample-AlignedExport stems to a DAW and keep them in sync: split a song, export sample-aligned WAVs, match sample rates, name the files and check for bleed.
6 min read · Updated September 25, 2026