Beauty Diagram makes your Mermaid and PlantUML diagrams beautiful. Pick from curated themes, animate the flow, and export as SVG, PNG, or GIF. Use the web editor, CLI, or API to drop diagrams straight into docs, PRs, and presentations.
Hey Product Hunt 👋
I'm Levi. Mermaid and PlantUML are great for *writing* diagrams fast,
but the moment I drop one into Notion, GitHub, or Confluence, two things
happen: the layout breaks in weird ways, or it renders fine but looks
so plain it clashes with the rest of my slide deck.
So I'd end up redrawing in Figma, or screenshotting and hoping nobody
zooms in. Both terrible.
Beauty Diagram fixes this. Paste your Mermaid or PlantUML code, hit
beautify, pick a theme that matches your doc or deck — done. For
higher-stakes moments (kickoffs, demos, exec reviews), there's also
animated playback you can export as a GIF.
Same engine ships as a web editor, a `bd` CLI, and an HTTP API, so it
fits whether you're polishing one diagram or wiring it into CI.
Free tier for everyday use, paid for teams and higher limits.
Two things I'd love feedback on:
1. Which doc tool's rendering frustrates you most? (Notion / GitHub / Confluence / other)
2. Which theme would you actually pick for a real document?
I'll be in the thread all day 🙏
Japan-based founder here. One Japan-specific thought: diagram tools often need CJK text checks before they feel reliable here. Japanese fonts, line breaks, labels, and dense stakeholder diagrams can break the experience quietly.
The strongest local angle may be dev docs / PRDs / stakeholder presentations with Japanese templates, rather than only “beautiful diagrams.”
the Figma detour is the tax every Mermaid user knows too well. the CLI/API angle is the right call for making this actually stick in a workflow rather than being a one-off tool. curious about the GIF export specifically for animated playback: is the animation sequenced to follow the actual logic flow of the diagram, or is it more of a visual fade-in? that distinction matters a lot for whether it communicates the flow or just looks nice
The CLI integration is the one I want to understand better. If I've got Mermaid diagrams living inside markdown files in a repo, can the CLI watch a directory and output styled SVGs automatically as part of a build step? Or is it more of a manual "run this, get that" thing?
Congrats on the launch Levi! The GIF export for exec reviews is such a specific and real pain point, that alone would've saved me multiple "let me just screenshot this real quick" moments. Notion's rendering frustrates me the most honestly, which theme works best for dark mode docs?
ngl this is something I didn’t realize I wanted but makes sense
I always end up screenshotting or redoing diagrams when they need to look decent 😅
this feels like a shortcut for that
A great idea as a SaaS solution. Especially since I recently needed a mind map.
I tested your tool and have a question: Can fonts and colors be customized individually to match your own corporate design? Or are you currently limited to the theme settings?
About Beauty Diagram on Product Hunt
“Diagrams that don't look like they were auto-generated”
Beauty Diagram launched on Product Hunt on May 1st, 2026 and earned 91 upvotes and 18 comments, placing #10 on the daily leaderboard. Beauty Diagram makes your Mermaid and PlantUML diagrams beautiful. Pick from curated themes, animate the flow, and export as SVG, PNG, or GIF. Use the web editor, CLI, or API to drop diagrams straight into docs, PRs, and presentations.
Beauty Diagram was featured in Productivity (650.7k followers), Developer Tools (511.7k followers) and Data Visualization (3.5k followers) on Product Hunt. Together, these topics include over 198k products, making this a competitive space to launch in.
Who hunted Beauty Diagram?
Beauty Diagram was hunted by Levi.l. 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 Beauty Diagram stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Levi.l