Privacy notice

Effective July 12, 2026

JargonLens is intended only for users aged 18 or older. It has one purpose: explain difficult technical, financial, business, and industry terminology while a user watches a captioned YouTube video.

Information handled

After consent, JargonLens reads the current YouTube video's ID and URL, title, language, duration, and playback state. Playback position is used locally to schedule overlays and is not sent to the backend. JargonLens does not collect general browsing history or monitor non-YouTube pages.

The video ID, URL, title, language, and duration are sent over HTTPS to the JargonLens backend on Google Cloud Run. The backend sends the video URL and language to Supadata to retrieve its existing timestamped transcript in native-caption mode. The video metadata and transcript are sent to Google's Gemini API to identify terminology and generate plain-English definitions.

When a user requests a detailed explanation, JargonLens sends the selected term, its short definition and domain, and the current video title to Gemini. It does not resend the complete transcript for that action.

JargonLens does not request or collect user accounts, general browsing history, microphone data, camera data, files, payment information, health information, personal communications, or advertising identifiers. It does not sell user data or use it for advertising, creditworthiness, or unrelated purposes.

Storage and retention

The extension stores consent and settings, terms marked “I know this,” up to 20 recent video glossaries, and the latest non-sensitive status locally in Chrome. Users can clear this data from the popup or remove the extension.

JargonLens does not log or permanently store complete transcripts. Its backend keeps only validated terminology results in a bounded in-memory cache for up to two hours of inactivity. Google Cloud may retain standard request metadata such as IP address, timestamp, request path, status, and diagnostic information under its service policies.

Service providers

Supadata processes the public video URL and returns its timestamped transcript.
Google Gemini processes transcript text, video metadata, and requested detailed explanations.
Google Cloud Run hosts the backend and processes standard request and operational data.

Limited use

JargonLens uses and transfers data only to provide or improve its disclosed terminology-explanation features, maintain security, comply with law, or complete a consented support request. It does not allow humans to read transcript or video data except with specific user consent for support, when necessary for security, or when required by law. JargonLens's use of information complies with the Chrome Web Store User Data Policy, including its Limited Use requirements.

Contact and changes

Privacy and support questions can be submitted through the support link on the JargonLens Chrome Web Store listing. Material changes will trigger an updated in-product disclosure and a new consent request.