Voice Note Cleaner
Cut rumble and quiet hiss from a Zoom clip or voice note in your browser - honest cleanup, not studio AI
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Drop an MP3, WAV, M4A or OGG voice note
Max 25 MB · high-pass + gentle noise gate · stays on this device
This is a high-pass filter plus a simple gate. It will not remove a barking dog or a second speaker. For cutting length, use MP3 Cutter.
About this tool
Phone voice notes pick up air-con rumble and keyboard hiss. This cleaner applies a high-pass filter and a simple noise gate in your browser - the same idea as a cheap hardware gate, not a neural “AI studio”. It will not rescue a concert recording, but it can make a WhatsApp memo easier to hear. Pair it with the silence remover if you also want long gaps cut.
How to use this tool
- Drop a voice memoShort notes work best. Processing uses the Web Audio API on your device.
- Download the cleaned fileListen before you send. If speech got chopped, the gate was too eager - try a quieter room next time.
Recording a cleaner voice note
The best noise reduction happens before you record: move away from fans, air-conditioning and traffic, hold the phone about 15 cm from your mouth, and record in a room with curtains or furniture rather than a bare kitchen or hallway.
The cleaner then cuts low rumble with a high-pass filter and quietens the gaps between words with a noise gate. If speech sounds choppy, the gate is closing on quiet syllables - record a little louder, or skip the cleaner for that file.
Key features
- Honest about not being AI.
- No upload of private conversations.
- Useful before you transcribe a muffled note.
Common uses
- Cleaning a client call memo recorded on a train.
- Reducing fridge hum on a spoken to-do list.
Tips for better results
- Record closer to the mic next time - no filter beats a better take.
- Use Audio to Text after cleaning if you want a transcript.
Mistakes to avoid
- Expecting studio vocal isolation from a 200 KB WhatsApp clip.
- Running it on music and wondering why cymbals vanished - the gate is for speech.
Frequently asked questions
Hold the phone a hand-width from your mouth, turn away from fans and air-con vents, and record in a room with soft furnishings rather than a tiled kitchen. A filter can lower steady hum and hiss, but it cannot separate a voice from a TV or another person talking over it.
No. It is a high-pass filter plus an RMS gate. That is the honest description on the page.
No. Audio is decoded and processed with OfflineAudioContext in your browser.
Whatever your browser can decode, typically M4A, MP3 and WAV from phone voice memos.
The gate is closing on quiet syllables. Record louder or skip this tool for that file.
Use Silence Remover to cut long pauses. Use this cleaner to reduce rumble and hiss on the remaining speech.