Free Online Audio File Denoiser
Quick & easy noise reduction for your audio files




Maztr's free online Audio File Denoiser is a quick and easy tool you can use right in your browser, without downloading any software, to remove or reduce background or ambient noise in your music and sound files. No account or login is required to use it.

The Audio File Denoiser is designed for users who don't want to sign up for an account and want a noise removal tool they can use quickly, on the fly. It can remove or reduce persistent background noise in your mix to give it a cleaner, brighter sound.

Need more free tools for your audio files? Click here to try our other Free Audio Resources.





Enter Settings

Select Audio File:

  • Sensitivity:
    (Sets the level of sensitivity in the sampling rates. Level 1 is recommended to start, however some audio files may need a higher level to reduce noise.)

  • Output Format:

  • Bitrate:


.wav or .mp3
Max size: 50MB
(Upgrade to 300MB)

Download Denoised File

After you upload an audio file, you will be able to download your denoised file here.






How does the Audio File Denoiser work?

It uses an algorithm to isolate background noise from quiet sections of your mix and then applies that profile to filter noise from the entire recording. The aim is to remove or reduce the noise as much as possible without altering the underlying signals. The process can be very effective at removing continuous or repetitive noise that degrades the final sound output.

What is background noise?

Background noise is background or ambient sound in a recording. Any sound or interference that was unintended is background noise. There are many types of noise such as hum, hiss, buzz, whistles, rumble and crackle that can be generated by sources such as audio recording equipment, electronic interference or simply noise in the room.

What does the Sensitivity setting do?

Sensitivity sets the level of noise reduction. The higher the Sensitivity setting, the more noise is reduced however more artefacts or imperfections may occur in the output. As a guide, the signal-to-noise ratio can be increased by 5 to 20 dB without noticeable loss of audio quality.

Can the Audio File Denoiser remove all backround noise?

No, it can't reduce occasional or irregular noises such as individual clicks and pops. It can also be difficult to get good results if the noise is very loud or the music or speech is not much louder than the noise itself.

Please note the Audio File Denoiser is not designed to replace our Mastering process. If you want the best results, we recommend you register for one of our accounts which have a much wider range of advanced "state of the art" Mastering tools, such as Equalizers, Compressors and Limiters, to make your songs and podcasts really shine.