How to Remove Background Noise From Audio (Free Online)

A steady hiss, the hum of a fan, or a voice that's too quiet can ruin an otherwise good recording. You don't need a studio or expensive software to fix it — the Audio Enhancer & Cleaner reduces background noise and makes voices clearer, right in your browser and completely free.

Remove background noise in three steps

1. Open the Audio Enhancer and drop in your recording.
2. Pick a mode — Reduce background noise for hiss and hum, or Enhance voice for clarity.
3. Click enhance, listen to the preview, and download the cleaned-up MP3.

Which mode should you use?

• Reduce background noise. Applies a spectral denoiser that lowers steady, constant noise — hiss, fans, air conditioning, electrical hum — while leaving the main sound intact.
• Enhance voice (podcast / vocals). Cuts low rumble and harsh high hiss, evens out the loud and quiet parts, and normalizes the overall level. Best for interviews, voice memos, and narration.
• Clean up & normalize. A balanced pass — a little denoise, a rumble cut, and loudness normalization — when you just want it to sound tidier.

What it can — and can't — fix

Be realistic about what noise reduction can do. It works well on:

• Steady background noise (hiss, hum, fans, room tone).
• Recordings that are too quiet or have uneven volume.
• Voice recordings that sound a little muddy or boomy.

It can'tfully remove loud one-off sounds (a door slam, a dog bark), heavy distortion or clipping, or completely separate a voice from loud music behind it — that needs specialized AI tools. Push denoising too hard and voices can start to sound watery, so aim for “cleaner,” not “perfectly silent.”

Tips for the best result

• Trim first. Use the Audio Trimmer to cut silence or noisy intros before enhancing.
• Fix volume separately if needed. The Change Volume tool can boost or normalize on its own.
• Record better if you can. No cleanup beats a quiet room and a mic close to the speaker — but the enhancer helps a lot when you can't re-record.

Go further

Once it sounds good, you can convert it to MP3, WAV, or M4A or join it with other clips. See all our audio tools in one place.

FAQ

Is my audio uploaded to a server?

No — everything is processed in your browser, so your recording never leaves your device.

Do I need to install anything?

No. It runs on any modern browser; the processing engine downloads once on first use and then works offline.

What format is the result?

The enhanced file is saved as an MP3, which plays on virtually any device or app.