Audio Denoiser

Recorded a voice-over, interview or talking-head video near a fan or air conditioner? Reduce steady background noise from its audio track and download a clean WAV for editing or publishing.

How it works

Choose a file, keep the defaults or adjust the options, then click the main button. The finished file downloads automatically when it is ready.

1
Choose your file
Upload the video, audio or GIF from your device. Its name and preview appear immediately so you can confirm the selection.
2
Adjust if you need to
The defaults are ready to use. Change any visible format, quality or size options only when you want a different result.
3
Click the action button
Click Convert, Compress, Normalise or Make GIF. The finished file downloads automatically when it is ready.

What you get

Simple tools, clear results, no unnecessary steps

Clean audio from audio or video files

Upload the recording you already have. The tool reads the audio track and returns a cleaned WAV.

Designed for constant background noise

It works best on steady fan noise, air-conditioning hum, microphone hiss and consistent room tone behind speech.

Editing-friendly WAV output

The result is a 48 kHz WAV, avoiding another lossy encoding pass after noise reduction.

A finished, ready-to-use file

Download the complete converted file in the format you chose, with no preview-only result or watermark.

Nothing to install

Open the tool on a phone or computer and get started. No app or extension is required.

Free to use

Conversion is free with a signed-in Spira account. There is no per-file charge and no length ceiling hidden behind a paywall.

When does audio denoising work best?

Use it when speech is understandable but a constant background sound makes the recording feel rough. Podcasts, voice-overs, interviews, tutorials and talking-head videos with one steady noise source are good candidates.

What noise reduction cannot fix

Denoising cannot reliably separate two people speaking at once, remove music underneath a voice or repair clipping and distortion. Sudden sounds such as knocks, keyboard taps or traffic horns may also remain because they are not steady noise.

FAQ

What background noise can it reduce?

It is designed for steady sounds such as fan noise, air-conditioning hum, microphone hiss and consistent room tone.

Can I upload a video?

Yes. Upload an audio or video recording and the tool will process its audio track. The download is an audio-only WAV file.

Can it remove music or another person's voice?

No. It cannot cleanly separate overlapping voices or music from the speaker you want to keep. It is intended for constant background noise.

Why is the result a WAV?

A 48 kHz WAV avoids adding compression artifacts after noise reduction and is easy to edit, sync back to video or convert later.

The conversion is the small end of it

Spira AI takes a script or a link and produces a finished short with voiceover, visuals and captions, then publishes it on a schedule. These tools are the bits you reach for along the way.