UniDiagram

UniDiagram

Text-to-Diagram Studio

All-in-one Diagram Editor

Launch Editor (Free)
Mermaid
Markdown Diagrams
PlantUML
Enterprise UML
D2 Lang
Modern Architecture
Graphviz DOT
Dependency Networks
Flowcharts
Process Trees
Sequence Diagrams
Interaction Lifelines
Class Diagrams
OOP Structures
State Graphs
FSM Stateflows
Component Maps
Deployment Specs
ER Diagrams
Database Entities
Mermaid
Markdown Diagrams
PlantUML
Enterprise UML
D2 Lang
Modern Architecture
Graphviz DOT
Dependency Networks
Flowcharts
Process Trees
Sequence Diagrams
Interaction Lifelines
Class Diagrams
OOP Structures
State Graphs
FSM Stateflows
Component Maps
Deployment Specs
ER Diagrams
Database Entities

One editor. Four rendering engines.

Switch syntax dynamically. Press keys, compile, preview, and copy vector outputs without switching tabs.

unidiagram.davidtran.dev/app
v0.8.4
editor_source.mermaid
ReadOnly Mockup
1flowchart TD
2  Client[Client Browser] -->|HTTPS| API[API Service]
3  API -->|SQL Query| DB[(Main Database)]
4  API -->|Cache Lookup| Cache[(Redis Cache)]
Engine: MermaidReady
Client BrowserHTTPSAPI ServiceSQL QueryDatabaseLookupRedis Cache
Scale: 100%|Format: SVG Vector
Click the tab buttons above to dynamically switch code examples and visualization outputs.
Autosave Snapshots
Local DB
Active Diagram Draft
Modified: Just now (32 lines)
Current
Client Database Schema
Modified: 10 minutes ago
Draft #1: Authentication Logic
Modified: 2 hours ago

Auto-save draft history.
Fully client-side.

Every letter you type triggers an automatic transaction to your browser's private database. Collapse the history panel to view chronologically indexed drafts, restore snapshot points, or copy legacy code in one click.

Zero Server Dependencies

Your code drafts are stored entirely in your local sandbox, keeping architecture records private.

High-fidelity output formats.

Deliver architecture specifications instantly. Copy transparent PNG images straight to your system clipboard for Slack messages or Notion documents. Export infinite-scale vector SVGs or clean PDF documents for engineering wikis.

Clipboard Copy

One-click copy exports diagram graphics directly to your system clipboard.

Pro Vector Export

Export SVG or PDF files for crystal-clear visuals at any zoom factor.

Export ControlsOptions
PNG Image
Raster snapshot. Perfect for chat applications.
SVG VectorPRO
Vector graphics. Best for websites and scaling.

Zen workspace.
Command-driven layout.

Maximize your workspace layout instantly. Fire up the built-in Command Palette using ⌘K to search tools, switch compiler engines, or run actions. Double-click dividers or toggle Focus Mode to hide sidebars and write code in a distraction-free view.

Click to toggle the mockup view
⌘KCommand Menu
Standard
History
active_draft.svg
database_schema.puml
network_flow.d2
Editor (Mermaid)
1# Compiler: mermaid
2title: App Architecture
3client -> server: API Call
4server -> db: Save record
Preview Canvas
Client BrowserHTTPSAPI ServiceSQL QueryDatabaseLookupRedis Cache

Share Diagram Link

PRO Feature
Require Security AccessEncrypt URL link with a temporary password

Secure sharing.
Collaborator approved.

Need quick design feedback or client approval? Generate production-grade sharing URLs directly from your canvas. Set precise link expirations, toggle password access, and let teammates view, inspect, or clone drafts instantly into their own editor sandbox.

Presigned Password Security

Optionally encrypt shared diagrams with randomized access tokens, preventing unauthorized directory crawls.

Autosave Engine

No save buttons required. The editor continuously checks your code syntax and commits logs to local index files automatically.

Hotkeys / Focus Mode

Power-user controls. Clear canvas, filter syntax, search directories, and toggle preview layouts instantly via keystrokes.

Grid Themes

Analyze diagram visibility. Switch canvas grids to inspect how elements render in both light grids and dark environments.

Presigned Access

Generate secure, client-ready links with configurable expirations (15m, 1h, 1d, 7d) to share work temporarily.

Cross-Engine Caching

Switch compilers on the fly. Active buffers for D2, PlantUML, Mermaid, and Graphviz are stored in independent caches.

No Signup Required

Zero friction. Launch the editor immediately to design specs. Sign up only if you need cloud hosting and sync features.

Ready to build your next diagram?

Launch the UniDiagram editor immediately. Start writing code to generate high-quality system layouts.

Open Diagram Editor