Synthux

synthux evaluates any web page using AI-powered analysis based on Nielsen's 10 Usability Heuristics and synthetic user profiles.

What's New in v1.8
• Issue Heatmap — Toggle a live severity heatmap directly on the analyzed page. Critical issues glow red, moderate yellow, minor green
• Hover-to-Highlight — Hover any issue in the report to instantly highlight the affected element on the live page with severity-colored borders
• Custom User Profiles — Create up to 5 custom personas with age, tech level, accessibility needs, and goals
• 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 analysis
• Multi-Provider AI — Use local AI (Ollama) for free, or your own API key with Google Gemini, OpenAI, or Claude
• 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 (4 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 on the page
6. Export as PDF or Markdown
AI Providers
• Local: Ollama (free, 100% private)
• Cloud: Google Gemini, OpenAI, Anthropic Claude (BYOK)
Privacy
• No telemetry, no analytics, no data collection
• BYOK — API keys stored only in your browser
• Open source — github.com/synthuxapp/synthux