PrivAudio processes your media entirely in the browser — nothing is uploaded to a remote server. It uses WebAssembly technology to transcode audio and video locally on your device.

WHAT MAKES THIS TOOL DIFFERENT?

Real Privacy, Not Empty Promises Other services claim to be "secure" but still transmit your content to their infrastructure. This app works 100% on-device. Verify it yourself: open Developer Tools (F12), switch to the Network tab, and run a transformation. You'll see zero data transfers. Confidential podcasts, personal recordings, and unreleased material never leave your machine.

Instant Processing Without Queues Traditional online tools require uploading, waiting in queue, and downloading the result. Since everything happens locally, transcoding starts immediately. A 5-minute video is processed in under 30 seconds on modern hardware.

SUPPORTED FORMATS

The app accepts the following inputs and produces MP3 output: • Video: MP4, WEBM, MKV, AVI, MOV, FLV • Lossless: WAV, FLAC, ALAC • Compressed: M4A, AAC, OGG, OPUS, WMA • Other: 3GP, AMR

You can also produce WAV from MP3 when uncompressed formats are needed for professional editing.

REAL-WORLD USE CASES

Podcasters and Content Creators Extract sound from video-recorded interviews for publishing on Spotify, Apple Podcasts, or other platforms. Keep pre-release material confidential without risk of leaks.

Video Editors Pull the sound track from MP4 videos to edit separately in Audacity, Adobe Audition, or DaVinci Resolve.

Students and Professionals Turn recorded lectures, conferences, or presentations into portable audio for listening on the go. University and corporate material stays private.

Musicians and Producers Transform demos, sessions, or masters into different formats without exposing them online before official release.

Mobile Users Process sound directly from your phone without installing apps that demand invasive permissions. Works in Chrome and Firefox mobile browsers.

FREQUENTLY ASKED QUESTIONS

Is it really free? Yes, completely free with no hidden costs.

Why does it take longer to load the first time? The browser downloads FFmpeg libraries (~4 MB) on the initial run. After that, everything works instantly.

Does it store any data? No. We retain nothing — no media, no metadata, no names. We use only technical cookies for site functionality and Plausible Analytics (privacy-respecting, no third-party cookies) for aggregate usage metrics.

Why should I trust this? You don't have to take our word for it. Verify with Developer Tools yourself.