Can I preview the effect before downloading?

Yes. After applying the effect, a preview player appears so you can listen before downloading.

What effects are available?

Reverb, echo, bass boost, treble boost, and a 3-band equalizer (bass, mid, treble).

Does applying effects reduce audio quality?

The tool re-encodes the audio when applying effects, so there is a small quality reduction. Using WAV as input minimizes this.

Are my files uploaded to a server?

No. All effects are applied in your browser using WebAssembly. Your files never leave your device.

Images Tool Box

Editing

Audio Effects Online Free

Apply audio effects to any file directly in your browser. Choose from reverb, echo, bass boost, treble boost, or a 3-band equalizer. Adjust the parameters, preview the result, and download. Supports MP3, WAV, FLAC, OGG, M4A, and more. Uses FFmpeg.wasm — no upload required.