Remove Background Noise From Audio — Free, No Upload
Clean hiss, fans, AC and hum out of recordings with a professional FFT denoiser — free, in your browser, nothing uploaded.
Drop your recording here or click to choose
cleaned on your device — your recording is never uploaded
ℹ️ Removes steady background noise: hiss, fans, air conditioning, electrical hum, room rumble. It won't remove people talking or music in the background — no honest tool can without damaging the voice.
Most recordings aren't ruined by the microphone — they're ruined by the room: the laptop fan, the air conditioner, the refrigerator hum you stopped hearing years ago but your recording didn't. The popular fixes are either paid (Adobe Podcast, Descript) or a website that wants your — possibly private — recording uploaded to its servers.
This tool runs FFmpeg's professional FFT denoiser (afftdn, the same filter used in real production pipelines) directly in your browser, with a before/after player so you can hear exactly what changed. Three strengths: Light for gentle hiss, Medium for fans and AC, Strong for loud steady noise — the stronger settings also cut low-frequency hum. And the honest part, printed right on the page: it removes steady noise. People talking in the background, barking dogs, clattering dishes — no honest tool removes those without mangling the voice.
Frequently asked questions
- What kinds of noise does it actually remove?
- Constant, steady noise: hiss, fan and AC drone, electrical hum (50/60Hz), room rumble, computer noise. These make up most of what ruins voice recordings.
- What can't it remove?
- Intermittent sounds — background conversations, traffic horns, dogs, keyboard clacks. Removing those requires AI source separation that damages voice quality; tools claiming otherwise are overselling.
- Which strength should I pick?
- Start with Medium. If the voice starts sounding underwater or robotic, step down to Light — over-denoising sounds worse than mild background hiss. Strong is for genuinely loud constant noise.
- Does this improve transcription accuracy?
- Noticeably, yes — steady noise is a top cause of transcription errors. Clean the audio here, then run it through our Audio to Text tool; both run privately on your device.
Guides
- How transcription in your browser works, and why nothing is uploaded A plain explanation of how a web page can turn speech into text without sending your recording anywhere: the Whisper model, the one-time download, what the Fast, Accurate and Best settings change, and what to expect on a phone.
- SRT vs VTT: which subtitle file to use, and how to add it to your video The two subtitle formats that matter, what is actually inside them, where each one works (YouTube, VLC, Premiere, CapCut, web players), the difference between a subtitle file and burned-in captions, and how to generate and fix one.
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🔒 Your files are processed on your device. This tool runs entirely in your browser — nothing is uploaded.