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Wavli  /  audio repair for iPhone

Clean up noisy recordings on your iPhone

Wavli removes steady background noise and electrical hum from audio and video, right on your iPhone. Your audio stays on your iPhone. Free to try.

Download on the App Store

3 free exports · then Wavli Pro

  • On-device
  • No account
  • Works offline
  • iOS 15+
Original
Remove Noise · Strength 50%
The real Fan noise clip: the first five seconds as recorded, the last five as Wavli exported them. Listen to both ↓

A/B

Hear Before and After

Two short recordings, each cleaned by Wavli on an iPhone. Play the original, then the result.

Choose a recording

Speech with steady broadband noise added, like a fan or air conditioning.

Original Fan noise.m4a
Wavli Remove Noise · Strength 50%

Level between words

−33.6 to −44.0 dBFS

−10.4 dB

The same speech with 50 Hz mains hum and its 100 and 150 Hz harmonics added.

Original Mains hum.m4a
Wavli Remove Hum · 50 Hz

Hum at 50 Hz

−23.4 to −61.3 dB

−37.9 dB

-20 -40 -60 -80 50100150200300400
OriginalWavliHz, average level

Measured from these two files. The speech is 8 kHz telephone-bandwidth audio with demonstration noise added, so judge the noise, not the voice quality.

Speech: Open Speech Repository (OSR_us_000_0010_8k.wav). Human voice recording with artificially added demonstration noise. Fan noise: pink broadband noise. Mains hum: 50 Hz with 100/150 Hz harmonics.

Wavli result screen for Fan noise: Your recording is ready, 159 KB to 79 KB, with Before and After players and waveforms, and Share and Files buttons
The same Fan noise result in Wavli: Before and After, 159 KB → 79 KB.

Signal path

From the share sheet to a clean file

  1. iOS share sheet for the Fan noise recording, with the Wavli app as a destination next to More

    In

    Tap Wavli in the share sheet

    Send audio or video from almost any app: tap Wavli in the share sheet, or pick a file from the Files app.

  2. Wavli sheet titled What would you like to change? for Fan noise.m4a, listing Fix Channels and Remove background noise

    Choose

    What would you like to change?

    Wavli asks what you want to fix. Pick “Remove background noise”, or “Remove Hum” for electrical hum. Your original stays unchanged.

  3. Wavli Strength slider set to 50 percent, between Natural and Strong
    Wavli Remove Hum Mains frequency control with Auto, 50 Hz and 60 Hz

    Set

    Strength, from Natural to Strong

    One automatic cleanup for steady noise: fans, air conditioning, computers. Set the Strength anywhere from Natural to Strong, and hear an 8-second preview before you commit.

    Remove Hum asks for the mains frequency instead: Auto, 50 Hz, or 60 Hz.

  4. Wavli Before and After players with waveforms, 10.0 seconds each

    Compare

    Before and After

    Every result opens with Before and After players and waveforms, so you can compare the cleaned version with the original before you save anything.

  5. Wavli export buttons: Share, Files, and Photos, with Adjust settings and Use in another tool

    Out

    Share, Files, or Photos

    Export audio as M4A (AAC), WAV, MP3, or AIFF, and video as MP4. Send the result with Share, save it to Files, or, for videos, add it to Photos.

Two tools

Noise and hum are different problems

Remove background noise

One automatic cleanup for steady noise: fans, air conditioning, computers. Set the Strength anywhere from Natural to Strong, and hear an 8-second preview before you commit.

Control
Strength, Natural to Strong
Preview
8 seconds, free
For
Fans, air conditioning, computers
Not for
Echo, clicks, crackle, background voices

Remove Noise, in detail →

Remove electrical hum

Mains hum from cables, amps, and chargers has its own tool. Leave Remove Hum on Auto, or pick 50 Hz or 60 Hz if you know where the recording was made.

Control
Auto, 50 Hz, or 60 Hz
Preview
8 seconds, free
For
Mains hum from cables, amps, and chargers
Not for
Crackle from a damaged cable

Remove Hum, in detail →

Also

Your audio stays on your iPhone

All processing happens on the device. Your recordings aren't uploaded to a server for cleaning.

More about your audio stays on your iphone →

Video keeps its picture

Clean the sound of a video and Wavli puts the cleaned audio back into it without re-encoding the picture. Save it as MP4 straight back to Photos.

More about video keeps its picture →

Wavli video result: the cleaned video's picture above Before and After audio players

Gets files in and out easily

Send audio or video from almost any app by tapping Wavli in the share sheet, or pick files from the Files app. Export as M4A, WAV, MP3, AIFF, or MP4. On iOS 16 and later, Shortcuts gets two Wavli actions: Clean Recording and Convert Audio to M4A.

M4AWAVMP3AIFFMP4

More about gets files in and out easily →

Limits Wavli is built for steady noise and hum. It doesn't remove clicks, crackle, or echo.

Guides

All guides →

Questions

Is Wavli free?
Wavli is free to try. Every tool and preview is free, and you can export your first files free. After that, saving new files needs Wavli Pro.
Does Wavli upload my recordings?
No. Noise and hum removal run on your iPhone, and your audio isn't sent to a server for processing.
What files can I clean?
Audio in M4A, MP3, WAV, AIFF, and CAF, and video in MOV and MP4. Opus and Ogg voice notes aren't supported. Voice memos work too: share them from Voice Memos and tap Wavli in the share sheet, or save them to Files first.
Can Wavli remove echo or wind?
Wavli has no echo removal. It also has no separate wind tool. Its noise removal is designed for steady noise, so gusty wind isn't something we claim it fixes. For video shot on iPhone 16 or later, the Camera's built-in Wind Noise Reduction is the better option.
Can I record in Wavli?
No. Record in Voice Memos, the Camera, or another app, then open the file in Wavli.
Which iPhones does it work on?
Any iPhone that runs iOS 15 or later. You don't need a new iPhone. Shortcuts actions need iOS 16 or later.