Privacy Policy — ConvertOnDevice

Last updated: August 18, 2026

ConvertOnDevice is a Chrome extension that converts image files between HEIC, WebP, AVIF, PNG, JPG, BMP, SVG, GIF, and ICO. This page describes, plainly, what the extension does and does not do with your data.

The short version

Nothing you convert is ever sent anywhere. There is no server, no account, no analytics, and no advertising in this extension.

How image conversion works

All format conversion happens locally, inside your browser, using the Canvas API and on-device decoding libraries. Whether you convert a file you drag into the extension's popup or an image you right-click on a webpage, the image data is processed entirely on your device and is never transmitted to us or to any third party.

Why the extension can request access to all websites

The right-click "Convert image as…" menu needs to read the exact image you selected on the page you're viewing, so it can decode it fresh instead of relying on a copy already drawn to a canvas (which browsers block for cross-origin images without special headers). That requires permission to make this request on whatever site you're on — but the extension only ever fetches the one specific image URL you right-clicked, for the sole purpose of converting it. It does not read, collect, or transmit anything else from any page, and it does not run on pages unless you explicitly invoke the right-click menu.

What is stored locally, and why

The extension keeps two small pieces of information in your browser's local storage, purely to avoid asking you for a rating more than once:

• A count of how many files you've successfully converted
• Whether you've already dismissed or responded to the in-extension rating prompt

Neither of these ever leaves your device. They are not sent to us, not linked to you, and not used for anything other than deciding whether to show that one prompt.

What the extension does not do

• No account or sign-in of any kind
• No analytics, tracking, or telemetry
• No advertising or third-party scripts
• No cookies
• No storage or transmission of your images, filenames, or conversion history outside your own device

Permissions this extension requests, and why

• contextMenus — adds the "Convert image as…" right-click menu
• downloads — saves the converted file (or ZIP, for batches) to your chosen downloads location
• offscreen — runs the image decode/encode work outside the extension's background script, which has no way to use a Canvas directly
• host_permissions (all sites) — fetches the specific image you right-click, as described above

Changes to this policy

If what this extension collects or accesses ever changes, this page will be updated and the change will be disclosed in the extension itself before it takes effect.

Contact

Questions about this policy: mrhexhog666@gmail.com