Substack Read Aloud — Chrome Extension
Last updated: August 3, 2026
✅ Substack Read Aloud does NOT collect, store, or transmit any personal data.
Substack Read Aloud ("the Extension") is a Chrome browser extension that reads Substack newsletter articles aloud and optionally translates them into other languages. This Privacy Policy explains how the Extension handles user data.
We are committed to protecting your privacy. The Extension is designed to function entirely within your browser without collecting or transmitting any personal information.
We do not collect any personal information. Period.
The Extension does not collect, store, or transmit:
The Extension performs the following operations, all of which occur locally in your browser:
translate.googleapis.com) to be translated into your selected language. See Section 5 for details.chrome.storage.local and are never transmitted externally.The Extension requests the following browser permissions, each for a specific and necessary purpose:
| Permission | Purpose |
|---|---|
| tts | Read article text aloud using Chrome's built-in text-to-speech engine |
| activeTab | Access the content of the current Substack tab when you trigger the read-aloud action |
| scripting | Inject a content script to extract article text from Substack pages |
| storage | Save your preferences (language, speed, voice) locally on your device |
| contextMenus | Add a "Read Selected Text" option to the right-click menu on Substack pages |
| translate.googleapis.com | Send article text to Google Translate for translation (only when you use the "Translate & Read" feature) |
When you use the "Translate & Read" feature, the article text is sent to Google Translate
(translate.googleapis.com) for translation. This is a Google-operated service.
Only the article text content is sent — no personal data, cookies, or identifiers are included in these requests.
Google's privacy policy applies to data processed by Google Translate: https://policies.google.com/privacy
The Extension uses Chrome's built-in TTS engine to convert text to speech. This processing occurs locally within your browser and no data is sent to external servers for TTS.
The Extension's popup interface loads the "Inter" font from Google Fonts (fonts.googleapis.com).
This is a standard CSS resource request. Google's privacy policy applies:
https://policies.google.com/privacy
The Extension stores the following data locally on your device only:
This data is stored using Chrome's chrome.storage.local API and never leaves your device.
You can clear this data at any time by uninstalling the Extension.
We do not sell, trade, rent, or transfer any user data to third parties for any purpose.
Since we do not collect or store any personal data on external servers, there is no risk of data breach from our end. All user preferences are stored locally within Chrome's secure storage system.
The Extension does not knowingly collect any personal information from anyone, including children under 13. Since no personal data is collected, the Extension is safe for users of all ages.
We may update this Privacy Policy from time to time. Any changes will be reflected on this page with an updated "Last updated" date. We encourage you to review this page periodically.
If you have any questions about this Privacy Policy or the Extension, please contact us: