Add Reverb to Audio — Free Online

Dry audio — recorded close to the microphone in an acoustically dead space — can sound clinical and unnatural. Adding reverb places a sound in a space: a small room, a concert hall, a cathedral. It is one of the most transformative effects in audio production, used to add warmth, depth, and presence to vocals, instruments, and sound effects.

This tool adds configurable room reverb and echo to any audio file. Choose the room size, wet/dry mix, and decay time, then export the processed file. It is useful for music production, game audio, film post-production, and any situation where you need to place a dry recording in a convincing acoustic environment.

How to Add Reverb to Audio Online

1. 1

   Upload your audio file

   Drop any MP3, WAV, FLAC, OGG, or AAC file. Files up to 100 MB are supported.

2. 2

   Choose reverb settings

   Select room size, wet/dry mix, and decay time to control the reverb effect intensity.

3. 3

   Download your audio with reverb

   Click Apply. FileCrank adds the reverb effect and exports your audio. Files are deleted within 1 hour.

How Convolution and Algorithmic Reverb Work

Reverb is acoustically produced by thousands of reflections of a sound bouncing off surfaces in a physical space. Digitally, there are two main approaches: convolution reverb uses an impulse response (a recording of a real space's acoustic signature) and convolves it with the dry signal using an FFT-based algorithm; algorithmic reverb uses a network of delay lines, comb filters, and all-pass filters to simulate a space without a recorded impulse.

This tool uses an algorithmic reverb implemented via the Web Audio API's ConvolverNode and a synthetic impulse response generated from the room-size and decay parameters you set. Processing runs entirely in your browser, with the wet signal blended with the dry at your specified ratio before export.

Why Use FileCrank to Add Reverb?

• ✓ Add natural-sounding room reverb to any audio.
• ✓ Adjustable room size, wet/dry ratio, and decay time.
• ✓ Supports MP3, WAV, FLAC, OGG, and AAC input.
• ✓ No watermarks, no signup, completely free.
• ✓ Files are processed securely and deleted within 1 hour.

機能と仕様

最大ファイルサイズ

最大100 MB

プライバシー

ファイルは約1時間後に削除されます

料金

無料、登録不要

処理方式

サーバーサイド

Frequently Asked Questions

Browser Reverb vs DAW Reverb Plugin

DAW reverb plugins (Valhalla, FabFilter Pro-R) offer deep parameter control and high-quality convolution engines, but require a DAW environment. This tool provides a streamlined set of controls sufficient for most practical uses — room size, decay, mix — and outputs a file directly from the browser, making it practical for quick processing without opening a full production environment.

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