Audio Phase Inverter

Flip the polarity (phase) of the Left or Right channel independently. Perfect for
checking mono compatibility, removing center vocals, or fixing mic phase issues.

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

What is the Smart AudioLab Studio?

Welcome to the ultimate browser-based audio engineering hub. Free Audio Lab transforms your standard web browser into a powerful, zero-latency Digital Audio Workstation (DAW). Designed for producers, podcasters, video editors, and content creators, our platform eliminates the need for expensive software subscriptions, complex installations, and intrusive account sign-ups.

Whether you are performing surgical 3-Band EQ sweeps, analyzing true peak LUFS for streaming compliance, calculating harmonic Camelot keys for a DJ mix, or seamlessly converting lossless formats, every tool you need is right at your fingertips.

Simply drag and drop your audio files into the designated workspace. Because we leverage modern WebAudio API technology, all processing—from waveform analysis to pitch shifting, phase inverting, and rendering—happens directly within your browser. This means zero wait times for server uploads, no file size limits, and an unparalleled level of data security.

Local Processing

Everything is computed locally on your device's own CPU and RAM. Enjoy lightning-fast rendering and real-time playback without the lag of traditional cloud-based converters.

100% Privacy

Your files never leave your device. We do not upload, store, monitor, or collect your audio data on any external servers. What you create stays entirely yours.

Pro Quality

Export your finished tracks with industry-standard precision. Maintain lossless audio integrity, hit exact true peak levels, and ensure your mix is ready for global distribution.

Blog & Guides

View All

Discover step-by-step guides, audio engineering tips, and tutorials to help you get the most out of Free Audio Lab.

Guide

How to Pick Songs Like a Pro DJ

Learn how to seamlessly blend songs and create your own DJ sets using the Smart Music Joiner and harmonic mixing techniques.

Read Article
Tutorial

How to Master Audio for Spotify in AudioLab Studio

Learn how to hit the perfect -14 LUFS target and optimize your track's true peak with AudioLab Studio.

Read Article