AudiowaveAudioWave

Upload an audio file and remove background noise, hiss, hum, and rumble. All processing is done entirely in your browser using FFmpeg audio filters.

Click or drag an audio file here to get started

Free Online Audio Noise Reduction — Remove Background Noise & Extract Clear Voice

Remove background noise, hiss, hum, rumble, and unwanted sounds from audio files directly in your browser. Powered by FFmpeg.wasm, this free online noise reduction tool processes everything locally with zero server uploads for complete privacy.

What Is Audio Noise Reduction?

Audio noise reduction is the process of removing unwanted background sounds from audio recordings while preserving the clarity of the primary audio content. Common types of noise include background hum from electrical equipment, hiss from recording devices, rumble from air conditioning or traffic, wind noise from outdoor recordings, and ambient chatter. Our online noise reduction tool uses FFmpeg's Non-Local Means Denoise (anlmdn) filter combined with optional frequency filters to clean your audio files — all running locally in your browser for maximum privacy and convenience.

How Our Noise Reduction Tool Works

Our noise reduction tool employs three audio processing techniques through FFmpeg. The core engine is the Non-Local Means Denoise (anlmdn) filter, which analyzes the audio signal to identify and suppress noise patterns while preserving the underlying clean audio. You can adjust the reduction strength from mild (preserves maximum detail) to aggressive (removes more noise at the potential cost of some audio fidelity). Additionally, a low-cut (highpass) filter removes low-frequency rumble, hum, and wind noise below a selected frequency, while a high-cut (lowpass) filter removes hiss, static, and high-frequency noise above a selected frequency. The processed audio is available for preview and download in your original file format.

Supported Audio Formats

Our noise reduction tool supports a wide range of audio input formats, making it compatible with virtually any audio file you need to clean:

MP3

The most widely used lossy audio format. Ideal for cleaning podcasts, music, and voice recordings in everyday use.

WAV

Uncompressed audio format that preserves full fidelity. Best for professional recordings requiring maximum quality preservation during noise reduction.

FLAC

Lossless compressed audio that maintains original quality. Perfect for archiving and processing high-quality audio recordings.

AAC

Advanced Audio Codec, standard for modern video platforms and streaming. Commonly used for denoising video soundtracks.

M4A

Apple's audio format based on AAC. Often used for recordings made on iOS devices and iTunes content.

OGG

Free open-source format using Vorbis compression. Popular in gaming, open-source applications, and online content.

OPUS

Highly efficient modern codec with excellent quality at low bitrates. Ideal for cleaning compressed audio streams.

AIFF

Apple's uncompressed audio format, similar to WAV. Extensively used in professional audio production on macOS.

AC3

Dolby Digital audio codec, commonly found in DVD and broadcast media. Useful for cleaning audio from video sources.

AU

Legacy audio format from Sun Microsystems / NeXT. Included for comprehensive format coverage and compatibility.

How to Remove Background Noise from Audio — Step by Step

  1. Upload your audio file by clicking or dragging it onto the upload area. Supported formats include MP3, WAV, FLAC, AAC, M4A, OGG, OPUS, AIFF, AC3, and AU.
  2. Adjust the noise reduction strength using the slider. Start with a value of 3.0 for balanced results, or increase for more aggressive noise removal.
  3. Optionally enable the low-cut filter to remove rumble and hum, and/or the high-cut filter to remove hiss and static. Adjust the frequency sliders to target specific noise types.
  4. Click the "Apply Noise Reduction" button to begin processing. The tool will apply the filters and generate a preview of the cleaned audio.
  5. Preview the cleaned audio using the built-in player. If satisfied, download the processed file. Adjust settings and reprocess if needed for optimal results.

Popular Use Cases for Noise Reduction

  • Podcast & Voice Recording — Remove background noise, mic rumble, and room echo from voice recordings and podcasts for professional-sounding, crystal-clear audio.
  • Field & Outdoor Recordings — Clean up wind noise, traffic sounds, and environmental background from interviews, documentaries, and field recordings captured in uncontrolled environments.
  • Music Production — Remove hiss, hum, and background artifacts from music recordings, demos, and archived audio without compromising the musical content.
  • Video Content Creation — Improve audio quality in video productions by removing camera noise, AC hum, and background chatter from voiceovers and dialogue tracks.
  • Audio Restoration — Clean and restore old recordings, cassette tapes, vinyl rips, and archival audio by removing accumulated noise, hiss, and analog artifacts.

Frequently Asked Questions About Noise Reduction

1. How effective is this noise reduction tool?
Our tool uses FFmpeg's Non-Local Means Denoise (anlmdn) filter, which is effective at reducing steady-state noise such as hiss, hum, fan noise, and background rumble. The adjustable strength lets you balance noise reduction against audio quality. For typical background noise reduction, it performs very well. For complex or dynamic noise (e.g., overlapping conversations), results may vary and you may need to experiment with the strength and frequency filter settings.
2. Is my audio file uploaded to any server?
No. Everything runs entirely in your browser using FFmpeg.wasm (FFmpeg compiled to WebAssembly). Your audio file never leaves your device. This makes the tool 100% private and secure — perfect for sensitive recordings, confidential meetings, or copyrighted content. No signup required, no server uploads, no data retention.
3. What is the difference between noise reduction strength, low-cut, and high-cut filters?
The noise reduction strength controls the intensity of the anlmdn denoising algorithm, which analyzes and suppresses noise patterns throughout the full frequency spectrum. The low-cut (highpass) filter specifically removes low-frequency content below a set threshold — ideal for rumble, wind noise, and electrical hum. The high-cut (lowpass) filter removes high-frequency content above a set threshold — ideal for tape hiss, static, and sibilance. Using all three together provides comprehensive noise control.
4. Will noise reduction affect the quality of my audio?
Noise reduction involves a trade-off between removing unwanted noise and preserving the original audio quality. At low to medium strength settings (1-5), most clean audio content is preserved while noticeable background noise is reduced. At higher strength settings (6-10), more noise is removed but some subtle details, reverb tails, or high-frequency content may also be affected. We recommend starting with lower settings and increasing only if needed. The preview feature lets you compare before and after to find the right balance.
5. Can I use this tool for removing noise from voice recordings?
Yes, this tool is particularly effective for voice recordings and podcasts. Voice recordings typically contain steady background noise (AC hum, fan noise, room tone) that the anlmdn filter handles very well. For voice content, we recommend starting with a strength of 2-4 and enabling the low-cut filter around 80-100 Hz to remove rumble without affecting voice frequencies (typically 85-255 Hz for male speech and 165-255 Hz for female speech).
6. What audio formats can I use for noise reduction?
We support 10 major audio input formats: MP3, WAV, FLAC, AAC, M4A, OGG, OPUS, AIFF, AC3, and AU. The output file preserves your original format — for example, uploading an MP3 file produces a denoised MP3. All internal processing uses uncompressed WAV at 44100 Hz to maintain maximum quality during the noise reduction process.
7. Does this tool work on mobile devices?
Yes, the noise reduction tool works on any device with a modern browser, including smartphones and tablets (iOS Safari, Chrome for Android, Samsung Internet). All processing happens in your browser via WebAssembly, so no app installation is needed. The interface is fully responsive and optimized for touch input. Processing on mobile devices may take longer depending on your device's CPU performance.

Free Online Audio Noise Reduction — Clean & Clear Audio in Your Browser

Our free online noise reduction tool removes background noise, hiss, hum, rumble, and unwanted sounds from any audio file directly in your browser. Using FFmpeg.wasm Non-Local Means Denoise (anlmdn) combined with optional low-cut and high-cut frequency filters, it provides a practical and effective solution for cleaning podcasts, voice recordings, field audio, music, and video soundtracks. With support for 10 audio input formats, adjustable noise reduction strength, preview before downloading, zero server uploads, and no signup required, it is an essential tool for podcasters, content creators, musicians, journalists, and anyone who needs crystal-clear audio.