synthux

AI-powered UX audit in your browser. Evaluate any page with synthetic user profiles and Nielsen's 10 heuristics using local AI.

synthux evaluates any web page using AI-powered analysis based on Nielsen's 10 Usability Heuristics and synthetic user profiles. What's New in v1.9.0 • Flow Builder — Visual canvas for mapping multi-page user journeys. Connect pages, add sticky notes, and run cross-page UX analysis • Multi-Flow Saves — Save, name, load, and delete multiple flows independently • Session Tracking — Each analysis gets a unique session ID, preventing stale results from previous runs • Dynamic Vision Detection — Automatic capability check for Ollama vision models Key Features • Issue Heatmap — Toggle a live severity heatmap on the analyzed page. Critical = red, moderate = yellow, minor = green • Hover-to-Highlight — Hover any issue to instantly highlight the affected element on the live page • WCAG Audit (axe-core) — Automated WCAG 2.2 AA compliance testing with impact severity and fix references • Vision Analysis — Full-page screenshot capture for visual hierarchy, color harmony, and CTA visibility • Custom User Profiles — Create up to 5 custom personas with age, tech level, accessibility needs, and goals • Code Fix Suggestions — Concrete before/after code snippets for each issue • PDF & Markdown Export — Professional reports ready for stakeholders • Accurate Cost Tracking — Real-time token usage and cost estimation How It Works 1. Open any web page and click the synthux icon 2. Choose Quick (3 heuristics), Deep (10 heuristics), or Custom scan mode 3. AI evaluates from multiple perspectives: First-Time Visitor, Power User, Accessibility User, and your custom profiles 4. Get detailed scores (0-100), issues, recommendations, and code fixes 5. Toggle the heatmap to see issue density, hover issues to highlight elements 6. Use Flow Builder to analyze complete user journeys across multiple pages 7. Export as PDF or Markdown AI Providers • Local: Ollama (free, 100% private) • Cloud: Google Gemini, OpenAI, Anthropic Claude (BYOK — bring your own key) Privacy • No telemetry, no analytics, no data collection • BYOK — API keys stored only in your browser • Open source — github.com/synthuxapp/synthux