Free Online Web Synthesizer & Virtual Keyboard

Design original sounds, tweak ADSR envelopes, and play music directly in your browser.
Record your melodies and export them as high-quality WAV files.

Browser-Based Digital Synthesizer

Create royalty-free sound effects, thick basslines, and retro synthwave melodies instantly without installing any external VST plugins.

What is a Web Synthesizer?

Our Free Web Synthesizer is a powerful virtual instrument built natively on the Web Audio API. It allows you to generate completely original audio signals directly from your browser. Instead of relying on pre-recorded samples, this synthesizer features real-time oscillators (Sine, Square, Sawtooth, Triangle), interactive filters, and full ADSR (Attack, Decay, Sustain, Release) envelope controls, giving you total freedom over your sound design.

How to play and record?

You don't need an expensive physical MIDI controller. You can play notes instantly by using your computer's QWERTY keyboard (e.g., A, S, D, F keys act as piano keys) or by clicking the interactive virtual keyboard on the screen. Shape your tone using the sliders in the control panel. Once you find the perfect sound, hit the Record button, play your original melody, and download the performance as a pristine, lossless .wav file.

Who uses this tool?

This online MIDI keyboard and synthesizer is widely used by independent beatmakers designing unique royalty-free sound effects, music theory students practicing scales and chords on the go, and producers who want to quickly draft a melody idea from their laptop and export it to their main studio software later.

How to Create Sounds in 3 Steps

Step 1

Design Your Sound

Select your oscillator waveform (e.g., Sawtooth for harsh sounds) and tweak the ADSR envelope.

Step 2

Play the Keyboard

Use your computer keyboard, mouse, or touch screen to play chords and melodies instantly.

Step 3

Record & Export

Click the Record button, perform your original track, and export it as a high-quality WAV file.

Synth Settings

ADSR Envelope

Studio Recorder & Note Logger

Record your live synthesizer sessions and keep track of the notes you play. Export the session as a WAV file and save the note history as a text file!

Pro Tip: Need your file in .MP3 format? Export as WAV here, then use our fast converter.
WAV to MP3 Converter

2-Octave Keyboard. Use keys Z, X, C, V... for lower octave and Q, W, E, R... for upper octave.

Audio Tip: Because this tool processes 2-channel stereo audio, we highly recommend using headphones for the best performance.
Mobile Users: If playing without headphones, ensure your device's Silent/Mute switch is OFF to hear sound from the speakers.

Frequently Asked Questions

Is the Web Synthesizer really free?
Yes. The Web Synthesizer and all recording features are completely free. You can record, playback, and export as many high-quality WAV files as you want without any hidden limits.

Do I need a MIDI keyboard to play?
No. You can easily play the virtual synthesizer using your standard computer keyboard (QWERTY) or by clicking the piano keys on your screen with your mouse or touchscreen.

What does ADSR mean?
ADSR stands for Attack, Decay, Sustain, and Release. These four parameters control the "envelope" or shape of the sound. For example, a high Attack makes the sound swell in slowly like a violin, while a short Attack makes it punchy like a drum.

Are my recordings safe and private?
Absolutely. The audio generation and recording process happens entirely within your web browser's local memory. Your original melodies and sound designs are never uploaded to any servers.

Can I use the exported audio in commercial projects?
Yes! Any original melody, sound effect, or beat you create and record using this synthesizer is 100% your property. You are free to use your exported WAV files in commercial music, royalty-free beat packs, or YouTube videos.

Do I need to install any software?
No. This virtual instrument utilizes the powerful Web Audio API to generate sound directly within your modern web browser, eliminating the need to install heavy VST plugins or digital audio workstations (DAWs).