Hey Product Hunt 👋 I built DiagramPreview because I kept running into the same problem: AI tools can generate Mermaid, PlantUML, draw.io XML, Grafana dashboards, Prometheus rules, JSON Schema, and many other technical snippets, but they usually do not give you a good way to preview, debug, edit, or export the result. DiagramPreview started as a simple Mermaid preview tool, then gradually became a browser-based workspace for developers, technical writers, architects, and product teams who work with visual scripts and structured files. Today it supports 70+ tools, including: - Mermaid, PlantUML, Graphviz, D2, draw.io, Markdown previews - AI diagram generation and fixing - JSON/YAML/XML/CSV visualizers - OpenAPI, SQL, Prisma, DBML, GraphQL, Protobuf diagram tools - Docker, Kubernetes, Terraform, GitHub Actions, Nginx, Helm visualizers - Grafana dashboard and Prometheus alert rule generators - SEO/debug tools like robots.txt tester, sitemap viewer, Open Graph preview debugger The main idea is simple: paste text or generated output, preview it instantly, debug it visually, then export or continue editing. I would love feedback from developers, DevOps engineers, technical writers, and anyone who often works with diagrams-as-code or AI-generated technical docs. What tool or format should I add next?

DiagramPreview

Paste Mermaid/PlantUML/OpenAPI/SQL and export diagrams

Paste Mermaid/PlantUML/OpenAPI/SQL and export diagrams