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Diagrams that look like you meant them. Designed, not generated — Mermaid, PlantUML, draw.io in, sleek, modern visuals out.

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Hub

Your diagram library.

Keep Mermaid, PlantUML, draw.io, and SVG-based diagrams organized in one place. Signed-in users can save source, reopen diagrams in the editor, track history, share read-only links, and export polished SVG or HD PNG versions when the diagram is ready.

Log in to view your hubOpen editorView templates

Organize with folders

Group Mermaid, PlantUML, draw.io, and SVG imports by project, client, or team so nothing gets buried.

Share via private link

Send a read-only link to collaborators without exporting files.

Reopen and iterate

Keep version history, reopen saved diagrams in the editor, and export a cleaner SVG or HD PNG when the diagram changes.

PreviewHere's what your hub looks like once you're in.
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Product
MERMAIDToday

Onboarding flow

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Billing
PLANTUMLYesterday

Payment retry logic

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Platform
DRAW.IO3 days ago

Infra overview

Start points
Open editor

Paste Mermaid, PlantUML, draw.io XML, or SVG and preview the beautified result.

View templates

Start from reusable flowchart, architecture, product, and planning examples.

Browse diagram types

Compare flowcharts, sequence diagrams, Gantt charts, ER diagrams, state diagrams, and PlantUML activity diagrams.

Browse use cases

Find workflows for Mermaid beautification, PlantUML activity diagrams, draw.io import, SVG export, and PNG export.

Compare tools

Choose between Beauty Diagram, Mermaid Chart, Eraser, draw.io, SVG, PNG, and source-first workflows.

Read guides

Learn workflows for beautifying, exporting, importing, and sharing diagrams.

See pricing

Compare export, watermark, AI, draw.io import, and saved history options.

Hub capabilities
What is saved in Diagram Hub?

Signed-in users can save diagram source, selected format, theme settings, folders, and history so the diagram can be reopened without rebuilding it from scratch.

Can public visitors see private diagrams?

No. This page is a public overview. Actual saved diagrams are only rendered for the signed-in account that owns them.

Where should I start if I do not have a saved diagram yet?

Open the editor for a blank workflow or browse templates when you want a ready-made Mermaid starting point.