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DiagramPreview
Paste Mermaid/PlantUML/OpenAPI/SQL and export diagrams
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?
No comment highlights available yet. Please check back later!
About DiagramPreview on Product Hunt
“Paste Mermaid/PlantUML/OpenAPI/SQL and export diagrams”
DiagramPreview was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #65 on the daily leaderboard. Preview and convert Mermaid, PlantUML, Markdown, Graphviz, D2, draw.io, mind maps, JSON, YAML and developer diagrams online.
DiagramPreview was featured in Design Tools (260.8k followers), Open Source (68.5k followers), Developer Tools (514.5k followers) and GitHub (41.3k followers) on Product Hunt. Together, these topics include over 148.5k products, making this a competitive space to launch in.
Who hunted DiagramPreview?
DiagramPreview was hunted by peng li. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how DiagramPreview stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
peng li