- 15–30 dB typical floor reduction
- 0 bytes uploaded, ever
- ~4 s to clean a 3-minute file
- Free — no quota, no watermark
- Offline after first load
How to get the best clean
- Feed it the noise. The tool learns what to remove from the quiet moments. If you're recording fresh, hold one second of silence before speaking, then use the "first 0.7 s is noise" profile — that sample is worth more than any slider.
- Start at 70%. Clean, then A/B. If the voice sounds underwater, back the strength off; if hiss survives, push it up or lower the residual floor. Two passes at moderate strength beat one pass at maximum.
- Export the WAV. Lossless out, convert to MP3 afterwards if you need small — compressing before cleaning bakes the noise in.
What's on the bench
Learns your noise
Auto mode finds the quietest slices of your file and fingerprints them; or mark the head of the file as noise-only for surgical profiling.
Measured, not vibes
The readout shows your noise floor before and after in dBFS — a number you can check, not an adjective we chose.
A/B at the tap
Flip between original and cleaned mid-playback. If the cure sounds worse than the disease, you'll know in two seconds.
Strength you control
A slider from gentle to aggressive plus a residual-floor control — the two knobs that matter, without a mixing degree.
Record right here
No file yet? Record from the mic, clean it, export — one page, nothing installed.
Private by architecture
Others promise not to peek at your uploads. We can't peek: there is no server. The difference matters for voice notes that were never meant to travel.
FAQ
Does my audio get uploaded?
No — structurally no. This site is static files; there's no server that could receive audio. Everything runs in your browser and works offline once loaded.
What noise can it remove?
Steady noise: hiss, hum, fans, AC, tape noise, room tone. Not one-off sounds — a cough, a dog, another voice. Those are jobs for an editor's scissors (our trimmer), not a spectral gate.
How much does it remove?
Typically 15–30 dB of floor reduction on steady noise at default strength. The before/after readout shows your actual number.
Why WAV export only?
A good MP3 encoder is a heavyweight dependency we'd have to ship to you. WAV is lossless and everything accepts it — convert after cleaning if you need small files.
File limits?
10 minutes per file — a memory honesty limit, not an upsell. Longer recordings: split, clean, rejoin.
Really free?
Your device does the computing, so there's nothing to bill you for. No account, no watermark, no per-minute meter.
From the bench notes
How to remove background noise from a recording
The noise-sample trick, the right strength, and when to stop.
PreventionWhy your recordings hiss (and how to stop it at the source)
Gain staging in plain words — the fix that makes this tool unnecessary.
Under the hoodHow noise reduction actually works
Spectral gating explained honestly — including what it can't do.
PhonesRecording clean audio on a phone
Distance, rooms, and the two settings that matter more than the phone.
The rest of the bench
Audio trimmer
Cut the fumble off the front, the chair-scrape off the end, with proper fades.
On this siteSilence cutter
Auto-removes the dead air from voice memos and rough podcast takes.
On this siteLoudness normalizer
Bring a too-quiet recording up to a sane level without clipping it.
GuideAll articles
Cleaner recordings, with and without this tool.