- 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.
- Keep the file. M4A comes out small and universal; grab the WAV instead when you want lossless. Either way, clean first — compressing before you clean 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.
Podcast cleanup in one tap
One preset chains three fixes a spoken take usually needs: notch out mains hum, gate the hiss, then level the peak to −1 dBFS — no mixing knobs required.
Remember a noise profile
Save the fingerprint of a room or a fan and re-apply it to the next file from the same setup. Same mic, same problem, one click next time.
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.
What format is the export?
M4A (AAC) by default — small, and it plays everywhere — with a WAV button for when you want lossless. Not MP3: that encoder is a heavyweight we'd rather not ship you, and M4A sounds better at the same size. If a browser can't make AAC, the export drops to WAV and says so.
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.