AudiowaveAudioWave

Upload an audio file, then adjust room size, decay, and wet/dry mix to add reverb.

Click or drag & drop an audio file here

How to Add Reverb to Audio Online – Free Reverb Effect Guide

Learn how to add realistic reverb to your audio online free. Control room size, decay time, and wet/dry mix to create hall, room, or studio effects. Perfect for music production, vocal processing, podcasts, and sound design. No signup.

How Does Reverb Work?

Reverb (reverberation) simulates the complex reflections of sound in a physical space. Our tool uses FFmpeg's aecho filter with multiple delay lines to create a natural‑sounding reverb. You can control the room size (delay times), decay (how long the reverb lasts), and wet/dry mix (balance between original and effect). The result adds depth and space to your audio.

Step‑by‑Step to Add Reverb

  1. Upload your audio file (MP3, WAV, FLAC, etc.).
  2. Adjust room size – larger values simulate bigger spaces.
  3. Adjust decay – how long the reverb tail lasts.
  4. Adjust wet/dry mix – more wet = stronger reverb.
  5. Click 'Add Reverb' – preview and download the result.

Frequently Asked Questions

1. What's the difference between reverb and echo?
Echo is a single distinct repetition; reverb is a dense series of reflections that blend together, simulating a room or hall. Our reverb effect creates natural room ambiance.
2. Can I make the reverb sound like a cathedral?
Yes, increase room size and decay (e.g., 80‑100%) for a large, spacious hall effect.
3. Will reverb make my audio clip?
Our tool prevents clipping by preserving headroom. If you hear distortion, reduce wet/dry mix or lower the room size.
4. Is my audio uploaded to a server?
No. All processing happens locally in your browser using FFmpeg.wasm. Your files stay private.
5. Why does the output file size change?
Reverb adds additional audio content (the reverb tail), so the file may become slightly larger, especially if the decay is long.

Give Your Audio Professional Space

Reverb is essential for music production, podcast intros, and cinematic sound design. Our free tool makes it easy to add realistic room effects with simple sliders. No signup, no watermarks, completely private.