Privacy Policy

Last updated: June 9, 2026 · Effective date: June 9, 2026

The short version: synthux does not collect, transmit, or share any personal data. Analysis runs locally with Ollama, or through your own API key directly to your chosen provider — no middleman.

Overview

synthux is an open-source Chrome extension that performs UX/UI analysis using AI. You can run analysis locally with Ollama (free, nothing leaves your machine), or use your own API key with a cloud provider (Google Gemini, OpenAI, Anthropic Claude). 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

Local AI (Ollama)

When using Ollama, all analysis is performed entirely on your local machine:

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

Cloud AI (BYOK — Bring Your Own Key)

When using a cloud provider, page data is sent directly from your browser to the provider's API using your own API key:

Provider	Data sent to	Privacy policy
Google Gemini	`generativelanguage.googleapis.com`	Gemini API Terms
OpenAI	`api.openai.com`	OpenAI Privacy
Anthropic	`api.anthropic.com`	Anthropic Privacy

Important:

synthux does not proxy your requests through any intermediary server
Your API key is stored locally in chrome.storage.local and sent directly to the provider
synthux developers have no access to your API key or the data you analyze
Each provider's own privacy policy governs how they handle data sent to their API

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
API keys are stored per-provider in chrome.storage.local, never transmitted to synthux or any third party
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

synthux is developed by Ufuk Aydın (@ufhouck).

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