Privacy Policy

Last updated: March 9, 2026

The Short Version

Your audio files stay on your device. The MP3 to WAV converter on mp3towav.online runs entirely in your browser using WebAssembly, and the conversion path uploads no files to any server. The site itself does load third-party scripts — Plausible Analytics, Vercel Analytics and Speed Insights, and Google AdSense — and Google AdSense may set cookies or use similar technologies for advertising. The sections below describe each of these.

How the Converter Works

The converter uses Sonic Converter, a WebAssembly-based audio engine that runs directly in your browser. When you convert a file:

  • Your MP3 file is read locally by your browser — it is never uploaded to any server.
  • The WebAssembly engine decodes the MP3 and encodes it as WAV entirely in memory on your device.
  • The converted WAV file is saved directly to your device via your browser's download mechanism.
  • No audio data is transmitted over the network at any point during conversion.
  • When you close the tab, all data in memory is discarded.

You can verify this yourself by opening your browser's developer tools (Network tab) during conversion — you will see no outgoing file uploads.

What We Do Not Collect Ourselves

To be explicit about what mp3towav.online does not do:

  • No file collection — The converter does not upload, store, access, or process your audio files on any server.
  • No first-party cookies — We do not set our own cookies. Google AdSense, as a third party, may set cookies or use similar technologies in your browser; see the Advertising section below.
  • No accounts — There is no user registration, no login, and no personal information required to use the converter.
  • No data selling — We do not sell or share the data we hold.

Analytics

We use Plausible Analytics to understand how many people visit the site and which pages are popular. Plausible is a privacy-friendly analytics tool that:

  • Does not use cookies.
  • Does not collect personal data or personally identifiable information.
  • Is fully compliant with GDPR, CCPA, and PECR.
  • Is open source and independently auditable.
  • Hosts all data in the EU.

Plausible collects aggregate page view data without cookies. You can review their full privacy practices at plausible.io/data-policy.

The site also loads Vercel Analytics and Vercel Speed Insights, which record aggregate page views and real-user performance measurements for pages on this site. See the Vercel Privacy Policy.

Advertising

This site displays ads through Google AdSense. Google and its partners may use cookies or similar technologies to serve ads based on your prior visits to this and other websites, and may collect data such as your IP address, device information, and interactions with ads.

You can review how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites, and manage your ad personalisation settings at myadcenter.google.com. Browser settings and ad-blocking extensions also control what third-party scripts and cookies are allowed.

Third-Party Services

The site uses a small number of third-party services. Each has its own privacy policy:

Loading a third-party script means your browser makes a request to that provider, which can see your IP address and basic request metadata.

Children's Privacy

mp3towav.online is not directed at children under the age of 13. We do not knowingly collect any personal information from children. Since the converter does not require any personal data to use, no age-specific data collection occurs.

Changes to This Policy

If we make changes to this privacy policy, we will update the "Last updated" date at the top of this page. Since we do not collect email addresses or user accounts, we cannot notify users directly — we encourage you to review this page periodically.

Contact

If you have any questions about this privacy policy or how mp3towav.online handles data, contact us at privacy@mp3towav.online.