Privacy Policy

Audio of the tab you dub

When you press Start dubbing, the extension captures the sound of that one tab and streams it over an encrypted connection to Google’s Gemini Live API, with the language you want to hear. Google returns the translated speech and the extension plays it over the lowered original. Nothing is captured before you press the button, and capture ends when you stop or close the tab. The audio is processed in memory only and sent nowhere but Google. If Google also returns a text transcript, the extension uses it only to measure how far the dub lags behind, and discards it.

Your API key and settings

Dubbing uses your own Gemini API key from Google AI Studio. The key and your settings (languages, volumes, video sync, theme and the like) are stored in the extension’s local storage in your browser. The key is sent only to Google (generativelanguage.googleapis.com); the settings never leave your browser. To suggest a dub language, the extension looks at your browser’s language list and time zone, on your device only.

Video sync on YouTube

Sync dub with video delays the video picture so it lines up with the dub. It is on by default and works only on youtube.com, which is the only website the extension has access to. While it is on, a small script on YouTube pages changes when the player shows each video frame and hides captions while you dub with a delay. It reads no page content and sends nothing anywhere. You can turn it off in the popup, or restrict the extension’s site access in Chrome’s extension settings.

When you open the popup, the extension checks the current tab’s address only to tell whether it is a Chrome page (where capture is not allowed) or a YouTube page (where video sync can work). The address is not stored or sent. The extension has no accounts, collects no browsing history or personal details, and loads no code from outside itself. Links to our website and Telegram open only when you click them.

The only service the extension sends data to is Google’s Gemini API: the audio of the tab you dub, your chosen language and your API key. Because the key is yours, Google processes this data under your agreement with Google, the Gemini API Additional Terms of Service and the Google Privacy Policy. We have no access to it.

Please note: under Google’s terms, content sent with a free-tier key may be used to improve Google’s products and may be reviewed by people, while content sent from a Google Cloud project with billing enabled is not. The rules can differ by region, so check Google’s current terms, and avoid dubbing confidential conversations with a free key.

The use of information received from Google APIs will adhere to the Chrome Web Store User Data Policy, including the Limited Use requirements.

Contact form

If you write to us through the contact form, we receive your name, email address, message and the page language. To block spam we also store your browser’s user-agent and a one-way hash of your IP address, not the address itself. Messages are kept on our own server and may be emailed to us through Resend. We use them only to reply to you.

Statistics and cookies

• We count visits with Umami on our own server. It sets no cookies, stores no IP address, and does not count you if your browser sends Do Not Track.
• When enabled, Microsoft Clarity shows us in aggregate how pages are used. It sets cookies and masks what you type into forms; see the Microsoft Privacy Statement.
• Your language choice is kept in a cookie (NEXT_LOCALE, one year) and your theme in local storage. Some languages load fonts from Google Fonts. Our server keeps short-lived technical logs to run and protect the site.
• The support section only shows a TON wallet address. The site processes no payments.

• Extension: we hold no extension data. Remove your API key in the extension’s settings, or uninstall the extension to erase everything. Data already sent to Google is governed by Google’s terms.
• Contact messages: kept as long as needed to answer them, and deleted sooner if you ask.
• Statistics: Umami records contain nothing that identifies you. Clarity data is kept by Microsoft under its own terms.

Depending on where you live, you may have the right to access, correct, delete or export personal data we hold about you, and to complain to a data protection authority. In practice, the only personal data we may hold is a message you sent us; write to us and we will answer within 30 days. Double Kon is not directed at children under 13, and we do not knowingly collect their data.

When this policy changes, we update the date at the top of this page. If the extension ever handles data in a new way, we will say so in the extension and ask for your consent where required.

• Email: …
• Telegram: t.me/doublekon
• The contact form on our website