Free online audio tools that run on your device
Most online audio tools ask you to upload a song, wait in a queue, then download the result. AudioDrop skips all of that. The page loads the audio engine into your browser, and your file is processed by your own computer or phone. Nothing is sent to a server.
That makes it fast, private and free. There is no account, no daily limit, no watermark and no file size cap set by us. Long songs and full DJ mixes work. The only real limit is your device's memory.
Pick the tool you need below, or drop a song on this page to start with the stem splitter.
Stem splitter: vocals, drums, bass and other
The stem splitter takes a finished song and pulls it apart into four stems: vocals, drums, bass and other. Other holds everything else, like guitars, keys, synths and pads. Each stem gets its own mute, solo and fader, and you can download any stem or the current mix.
It works in two passes. An instant preview split appears in about a second, so you can start listening straight away. Then an AI model, HTDemucs (Hybrid Transformer Demucs, from Meta AI research), refines the split. The model is about 166 MB. On a phone or a slow connection AudioDrop asks before downloading it, and shows the size and about how long it will take. The file is saved on your device, so later splits start immediately. If a phone cannot run the model, the quick split stays available.
The same engine powers several focused pages:
- Stem splitter: all four stems with full mute and solo control.
- Vocal remover: mutes the vocals so you get an instrumental.
- Remove vocals from a song: the same job, written as a how-to for a file you already have.
- Instrumental maker: a backing track for covers, practice and school work.
- Acapella extractor: solos the vocals so you get a clean voice track.
- Karaoke maker: a sing-along backing track with the lead vocal gone.
- Drum remover and bass remover: drumless and bassless tracks for practice.
- Drum extractor: isolates the drums for sampling and study.
Audio converter: MP3, WAV, M4A, FLAC and more
The audio converter changes a file from one format to another in your browser. Turn a WAV into a smaller MP3 for sharing, turn an MP3 into WAV for a DAW or sampler, convert iPhone voice memos from M4A to MP3, or pull the audio track out of an MP4 video.
Because the conversion runs locally, a large WAV file does not need to travel over your connection twice. Drop it, choose the output, download.
Speed and pitch: change tempo and key
The speed and pitch tool changes playback speed from 0.5× to 2× and pitch from −12 to +12 semitones. It has two modes, and the difference matters.
Keep pitch is a time-stretch. Speed and pitch are independent, so you can slow a song down to learn it without it dropping in key, or change the key for your voice without changing the tempo. Varispeed works like a tape machine. Pitch moves with speed, which is exactly the sound behind nightcore and slowed edits.
| Page | What it does | Mode |
|---|---|---|
| Speed up audio | Faster playback, same key | Keep pitch |
| Slow down audio | Slower playback for practice | Keep pitch |
| Pitch shifter | Move pitch up or down in semitones | Keep pitch |
| Key changer | Transpose a song to suit a singer | Keep pitch |
| BPM changer | Match a tempo for DJ sets or running | Keep pitch |
| Nightcore maker | Faster and higher, tape style | Varispeed |
| Slowed and reverb | Slower, lower and washed in reverb | Varispeed |
Audio effects: reverb, bass boost and lofi
The effects tool gives you five knobs. Tone sweeps from a dark low-pass to a thin high-pass. Bass is a low-shelf boost of up to +12 dB. Drive adds saturation. Punch adds compression. Space adds reverb. Everything is live while you play, and everything is baked into the export.
Use it as a bass booster for small speakers, a quick reverb for a dry vocal, or a lofi maker that darkens, slows and warms a track in one go.
Analyse: find the BPM and key of a song
The BPM finder estimates tempo in the 70 to 180 BPM range from the song's rhythm. The key finder estimates the key and whether it is major or minor. Both give you a starting point for DJ sets, remixes, mashups and practice. They are estimates, so trust your ears when a result looks off, especially with half-time or double-time feels.
The guitar tuner, bass tuner and ukulele tuner listen through the microphone and show the note and the cents. The online tuner is the chromatic version. The metronome keeps a steady beat from 30 to 300 BPM. All of them run in the browser, and nothing is uploaded.
Which free audio tool do I need?
Not sure where to start? Match the job you have to the tool that does it. Every page opens with sensible settings already loaded, so you can drop a file and hear a result straight away, then fine tune from there.
You can also chain tools. Split a song with the stem splitter, download the instrumental, change its key with the key changer, then convert it to MP3 with the audio converter. Each step runs locally, so chaining costs nothing but a few seconds.
| I want to | Use |
|---|---|
| Make an instrumental or karaoke track | Vocal remover, instrumental maker or karaoke maker |
| Remove vocals from a file I have | Remove vocals from a song |
| Get a clean vocal for a remix | Acapella extractor |
| Practise drums or bass with the band | Drum remover or bass remover |
| Sample a drum break | Drum extractor |
| Learn a fast part | Slow down audio |
| Sing a song in a lower key | Key changer |
| Hit an exact tempo | BPM finder, then BPM changer |
| Make a nightcore or slowed edit | Nightcore maker, slowed and reverb, or the slowed reverb generator |
| Make a lofi slowed and reverb edit | Lofi maker |
| Change FLAC, OGG, WAV or M4A to MP3 | Audio converter |
| Tune a guitar, bass or ukulele | Guitar tuner, bass tuner, ukulele tuner or online tuner |
| Keep a steady practice beat | Metronome |
Private by design, and free
Your audio never leaves your device. There is no upload step, no server storage and no account to create. Close the tab and the work is gone from memory.
AudioDrop works in desktop Chrome, Edge, Firefox and Safari. Mobile browsers on iPhone and Android work too, though very long songs and the AI stem model are heavier on a phone. If you split stems or remix other people's music, respect the rights of anything you publish.