Online Tool Store
Reverb & Delay Tool
Upload an audio clip and apply adjustable reverb (via convolution) and echo/delay using the Web Audio API, then download the processed result.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
A short synthesised sample clip is loaded automatically — choose your own file to replace it.
Loading sample…
How Reverb & Delay Tool works
- Choose an audio file, or leave the auto-loaded synthesised sample clip in place.
- Set the delay time and feedback for the echo, and the decay time and mix for the reverb.
- Click "Apply reverb & delay" — an
OfflineAudioContextrenders aDelayNodefeedback loop and aConvolverNodereverb over your clip, entirely on your device. - Compare the dry and wet players, then download the processed result as a WAV file.
The delay is a standard tapped-delay line: your audio is routed into a DelayNode, and a portion of its output is fed back into itself (the feedback amount) to produce repeating echoes that decay over time. The reverb is convolution-based: rather than a
recorded room impulse response, the tool generates one on the fly — white noise shaped by an exponential decay envelope whose length is set by the decay slider — and convolves your audio with it, which is what gives the processed signal its sense of space.
FAQ
How is the reverb generated without an impulse-response file?
The tool synthesises its own impulse response — a burst of noise shaped by an exponential decay curve set by the Reverb decay slider — and feeds your audio through a ConvolverNode with it. That is the same "algorithmic reverb" approach used by many real hardware and plugin reverbs, just without a pre-recorded room sample.
Why do I hear both a dry and a wet player?
The dry player is your original clip (or the synthesised sample) untouched, decoded straight from the file. The wet player is the OfflineAudioContext render after the delay and reverb chain — comparing the two makes it easy to judge how strong an effect you actually want before downloading.
What audio format does the download use?
The processed result downloads as an uncompressed 16-bit PCM WAV file, built directly from the rendered AudioBuffer — it opens in any DAW or media player without needing a codec.
How we compare
| Feature | Online Tool Store | Doing it manually | A generic online tool |
|---|---|---|---|
| No file upload — runs in your browser | ✓ | N/A | ✗ |
| No sign-up required | ✓ | ✓ | ✗ |
| Free, no watermark | ✓ | ✓ | ✗ |
Uploading a clip to a server-side effects processor means waiting on a queue and trusting a third party with your audio. Reverb & Delay Tool renders the same delay-feedback and convolution-reverb chain locally with the Web Audio API, so the result appears in seconds and the file never leaves your device.