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Privacy Policy

Last updated: April 24, 2026 · Effective date: April 21, 2026

Overview

synthux is an open-source Chrome extension that performs UX/UI analysis using local AI. We are committed to protecting your privacy. This policy explains what data synthux accesses, how it is processed, and what is stored.

Data Collection

What synthux accesses

When you initiate an analysis, synthux temporarily reads the following data from the active browser tab:

• DOM structure: HTML headings, forms, links, buttons, navigation elements, and landmarks
• Accessibility attributes: ARIA roles, alt text, tab order, and focus indicators
• Page metadata: Title, description, language, viewport settings
• Visual metrics: Screenshot of the visible area (for report reference only)
• Performance indicators: DOM size, image count, script count

What synthux does NOT access

• Passwords, form inputs, or autofill data
• Cookies or session tokens
• Browser history or bookmarks
• Files on your computer
• Data from other tabs or windows
• Any data when analysis is not actively running

Data Processing

All analysis is performed entirely on your local machine using Ollama, an open-source local AI runtime:

• Page data is sent to Ollama running on localhost:11434
• The AI model processes the data locally
• No data is transmitted to external servers, cloud services, or third parties
• No API calls are made to remote AI services unless the user explicitly configures a BYOK (Bring Your Own Key) provider

Data Storage

• Analysis reports are saved in chrome.storage.local (browser-local storage)
• Reports remain on your device and are never synced or uploaded
• Settings (endpoint, model, language) are stored in chrome.storage.local
• You can delete all stored data by removing the extension
• Maximum 20 reports are retained; older reports are automatically removed

Data Sharing

synthux does not share any data with:

• The extension developers
• Third-party analytics services
• Advertising networks
• Any external server or API

Permissions Explained

Permission	Purpose	Data Impact
activeTab	Read the current page's DOM for analysis	Page content accessed only during active analysis
scripting	Inject the content script that extracts page data	Required for DOM reading; runs only when triggered
sidePanel	Display the analysis UI in Chrome's Side Panel	No data access
storage	Save settings and report history locally	Local-only, never synced
tabs	Read the current tab's URL and title for reports	URL/title only; no browsing history

Host Permissions

Host	Purpose
http://localhost:11434/*	Communicate with local Ollama AI server
<all_urls>	Enable analysis on any website the user visits

Why <all_urls>? synthux needs to inject a content script to read page structure on any website the user chooses to analyze. This permission is only exercised when the user actively initiates an analysis. The extension does not run background scripts on pages or monitor browsing activity.

Children's Privacy

synthux is a developer/designer tool and is not directed at children under 13. We do not knowingly collect data from children.

Open Source Transparency

synthux is fully open source under the MIT License. You can:

• Inspect the source code at github.com/synthuxapp/synthux
• Verify these claims by reviewing the codebase
• Build from source to ensure the extension matches the published code

Changes to This Policy

We may update this privacy policy from time to time. Changes will be documented in the CHANGELOG and reflected in the "Last updated" date above.

Contact

If you have questions about this privacy policy, please open an issue on our GitHub repository.

© 2026 synthux. Open source under MIT License.