Free Audio Phase Inverter & Polarity Flipper

Instantly flip the phase of your audio tracks by 180 degrees to fix phase cancellation.
Ensure perfect mono compatibility for your original recordings securely in your browser.

Online Audio Phase Correction Tool

Restore lost bass and fix hollow-sounding tracks by instantly inverting the polarity of your waveform without any quality loss.

What is Phase Inversion?

The Audio Phase Inverter (or Polarity Flipper) is a critical sound engineering utility. When two microphones record the exact same source (like a drum kit or a podcast interview), the sound waves can reach the microphones at slightly different times. This causes "phase cancellation," where the frequencies clash and cancel each other out, leaving your track sounding incredibly thin and weak. Our free tool mathematically flips the waveform upside down (180 degrees) to instantly realign the phase and restore the full body of the sound.

How to flip audio phase?

Simply upload your out-of-phase audio file into the secure, browser-based tool. You can listen to the original track using the built-in waveform player. By engaging the phase inversion toggle, the tool instantly flips the polarity of the track. If you are mixing this track with another audio signal in your DAW, this single flip can suddenly bring back the missing punch and low-end frequencies. Once corrected, click export to download a pristine .wav file.

Who uses this tool?

This online phase correction tool is heavily relied upon by mixing engineers fixing multi-mic studio recordings, podcasters ensuring their original multi-person interviews have perfect mono compatibility, and sound designers checking the phase correlation of their royalty-free samples. Because the processing occurs locally, your private audio data remains entirely secure.

How to Flip Audio Phase in 3 Steps

Step 1

Upload Audio

Select your audio file from your device. Supported formats include MP3, WAV, OGG, and M4A.

Step 2

Invert Phase

Activate the phase inverter switch to instantly flip the waveform's polarity by 180 degrees.

Step 3

Export File

Preview the phase change, then click Export to instantly download your corrected WAV file.

Upload Audio File

Supported formats: WAV, MP3, OGG, FLAC, M4A

Loaded:

Phase Controls

Export Settings & Preview

Audio Tip: Because this tool processes 2-channel stereo audio, we highly recommend using headphones for the best performance.
Mobile Users: If playing without headphones, ensure your device's Silent/Mute switch is OFF to hear sound from the speakers.
Pro Tip: You can professionally master, apply 3-Band EQ, and convert your tracks for free using our AudioLab Studio Tools
Pro Tip: Need your file in .MP3 format? Export as WAV here, then use our fast converter.
WAV to MP3 Converter

Frequently Asked Questions

Is the Audio Phase Inverter really free?
Yes. This online phase correction tool is completely free, requires no signup, and has no daily limits. You can flip the polarity of as many original recordings as you need.

Are my audio files safe and private?
Absolutely. All audio processing and phase inversion is performed locally within your web browser's memory. Your private audio files are never uploaded to our servers.

What is Phase Cancellation?
Phase cancellation happens when two identical or similar audio signals are played together but their waveforms are out of sync. When the positive peak of one wave meets the negative peak of another, they cancel each other out, making the audio sound hollow, weak, and lacking in bass.

Why would I need to flip the polarity?
If you recorded a snare drum or an interview with two microphones placed at different distances, the sound waves arrive at different times. Flipping the polarity (inverting the phase by 180 degrees) on one of the tracks often realigns the waves, instantly restoring the missing low-end and punch.

Will I lose audio quality after exporting?
No. When you apply the phase inversion, the tool mathematically flips the waveform without adding any compression or artifacts. It generates a pristine, uncompressed WAV file to preserve the highest audio fidelity.

Do I need to install any software?
No. The Audio Phase Inverter works entirely online directly within your web browser, removing the need to install or download heavy digital audio editing software.