Privacy Policy

We collect account identifiers, authentication session data, saved vocabulary, notebooks, review progress, language settings, lookup history when enabled, chat sessions, and support messages you send to us.

We process text you select, type, double-click, Shift-hover, translate, save, or ask Onlydict to analyze. For video learning, we process subtitle text and timing metadata needed to show the learning overlay.

We do not sell personal data. We do not use your learning data for behavioral advertising. We do not intentionally collect full page contents to profile you.

We do not automatically save every lookup into your notebook. Saving vocabulary requires a clear user action, unless you enable a feature that explicitly records history.

For privacy questions, data export, correction, or deletion, contact [email protected] from the email address connected to your Onlydict account so we can verify ownership.

This policy was last updated on July 24, 2026. Material changes will be reflected on this page.

Onlydict uses Supabase Auth for email/password login and supported OAuth providers such as Google and Apple. Supabase stores authentication identifiers, session tokens, provider identities, and related metadata needed to keep you signed in.

Your account may include your email address, display name, avatar URL, OAuth provider identifiers, sign-in timestamps, and active sessions.

When you use the web app, we may store notebooks, saved words and sentences, language settings, quiz/review state, lookup history, translation history, grammar analysis requests, chat sessions, chat messages, and uploaded file metadata needed to run the feature you requested.

AI and translation features may send your prompt, selected text, or uploaded content to configured AI, translation, dictionary, or search providers. Provider keys and billing controls stay server-side.

We keep account and learning data while your account remains active or as needed to provide the product, prevent abuse, comply with legal obligations, resolve disputes, and maintain backups.

You can request deletion of account data using the Data Deletion tab on this page.

Onlydict processes text you actively select, double-click, Shift-hover, normal-hover when enabled, type into the popup, or interact with in video subtitles to provide dictionary lookup, translation, pronunciation, save-to-notebook, and review features.

For YouTube, Netflix, and similar video learning pages, the extension may read subtitle text, subtitle timing, video page metadata, and the current playback position needed to show the subtitle overlay and lookup words inside captions.

Website access is used so the extension can show lookup UI on pages you choose to read and on supported video sites. Context menu access is used for selected text actions. Scripting is used for page-level bridges needed by some subtitle and lookup workflows.

Storage permission is used for extension settings, UI state, selected preferences, short-lived caches, and the extension session after you connect your Onlydict account through the web auth bridge.

You can disable triggers such as selection icon, double-click, Shift-hover, normal hover, and video subtitles in extension settings.

You can disconnect your account by signing out of the extension. You can also remove local extension data by uninstalling the extension or clearing extension storage in Chrome.

Onlydict processes user-selected text and video subtitles only to provide lookup, translation, vocabulary saving, notebook sync, and review features. User learning data is stored after login. Onlydict does not sell personal data or use learning data for behavioral advertising.

Email [email protected] with the subject "Delete my Onlydict data" from the email address connected to your Onlydict account.

Tell us whether you want to delete your full Onlydict account or specific account data associated with the account.

For a full account deletion request, we delete or anonymize account profile data, OAuth identities, notebooks, saved vocabulary, lookup history, translation history, review progress, chat sessions/messages, and related user-owned learning data, except records we must retain for security, fraud prevention, legal compliance, billing, or backup integrity.

For a partial deletion request, we delete or disconnect the specific user-owned account data you request where technically available after ownership verification.

We verify ownership before deleting account data. We normally complete verified deletion requests within 30 days, unless a longer period is required for security, legal, or operational reasons.

Local browser data stored by the Chrome extension may remain on your device until you sign out, clear extension storage, or uninstall the extension.

Use this URL for account data deletion instructions: https://onlydict.com/privacy#data-deletion

Supabase is used for authentication, database storage, user-owned learning data, Row Level Security, sessions, and account state.

Cloud hosting, Cloudflare tunnel/DNS, and related infrastructure may process request metadata such as IP address, user agent, timestamps, routes, and security logs.

Dictionary, translation, AI, and search features may send the text you ask us to process to configured providers so the requested feature can return a result.

Examples of provider categories include translation APIs, dictionary APIs, AI model providers, search providers, and media sites that provide subtitles or page content you ask the extension to use.

If paid plans are enabled, payment processors may handle billing data, transaction identifiers, subscription state, and payment method metadata. Onlydict does not store raw card numbers.

Support requests you send by email may include your email address, account details you provide, and technical details needed to resolve the request.

Onlydict is provided for personal language learning, lookup, translation, notebook, review, and AI-assisted study workflows. You are responsible for the content you submit and for complying with laws and site terms that apply to the pages, videos, or text you use with Onlydict.

Do not use Onlydict to abuse third-party services, violate intellectual property rights, bypass access controls, send unlawful content, or interfere with the reliability or security of the product.

Onlydict may change, pause, or discontinue features as the product evolves. Some features depend on third-party providers and may be limited by provider availability, pricing, or policy changes.

We may update these terms and this privacy policy by posting changes on this page. Continued use after changes means you accept the updated terms.

For terms, privacy, or account questions, contact [email protected].