Free Online Noise Reducer
Reduce hum, hiss and background noise from recordings.
What is this tool
AudioToolKit reduces background noise in audio recordings online. Spectral gating lifts the wanted signal above the noise floor, removing hum, fan noise and hiss from phone calls, voice notes and microphone recordings. Pick light, medium or heavy intensity, and download a cleaner MP3, WAV, M4A, FLAC, OGG or AIFF. Files are processed on our servers and deleted automatically.
Drag and drop your files here
or
MP3, WAV, M4A, AAC, OGG, FLAC, AIFF, AIF, OPUS, WMA, AMR — up to 25 MB per file
Light for music, heavy for strong hum or hiss.
Output
Cleaned MP3, WAV, M4A, FLAC, OGG or AIFF
Accepted formats
.mp3, .wav, .m4a, .aac, .ogg, .flac, .aiff, .aif, .opus, .wma, .amr
Why use this free tool
Phone calls, voice notes and cheap microphones pick up hum, fan noise and hiss. Spectral gating lifts the wanted signal above the noise floor, so recordings sound cleaner for transcription, podcasts and calls.
How does the free noise reducer work?
- 1
Upload the noisy recording.
- 2
Pick an intensity: light for music, heavy for strong noise.
- 3
Press Process and download the cleaned file.
Frequently asked questions
Will it affect the voice quality?
Light settings are very transparent. Heavy settings remove more noise but can make speech slightly metallic — start at medium.
Does it work on music?
Yes, but use light or medium. Music has more structure that aggressive denoising can damage.
Is the file uploaded?
Yes, denoising runs on our servers with ffmpeg so large files are fine. Files are deleted on a timer.
Related tools
More answers in the Help Center.