An all-in-one platform with 5 specialized editors: AI Diagram Generator, Circuit Simulator, AI Workflow Builder, CV & Resume Builder, and Mind Map Editor — all powered by AI.
Live App | Diagram Editor | Circuit Simulator | Workflow Builder | CV Builder | Mind Maps
Examples | Guides | Blog | Pricing
Turn natural language into professional diagrams in seconds.
- AI-Powered Generation — Describe any diagram in plain English, get instant results
- Eraser.io-Style DSL — Human-readable syntax for precise control over shapes, groups, and connections
- 3 Canvas Engines — Excalidraw (hand-drawn), React Flow (node-based), and Draw.io (enterprise)
- Auto-Layout Engine — ELK-based orthogonal layout with clean 90-degree edge routing
- 1000+ Icons — AWS, GCP, Azure, React, Docker, Kubernetes, databases, and more
- 36+ Shape Types — Rectangles, circles, diamonds, databases, actors, hexagons, cylinders, and more
- Multiple Layout Algorithms — ELK, Dagre, D3 hierarchical layouts
- Diagram Types: Flowcharts, Architecture Diagrams, Mind Maps, Sequence Diagrams, ERDs, BPMN Workflows, Cloud Architecture, System Design, Org Charts, Family Trees
- Image Attachments — Attach up to 3 reference images for AI to understand context
- Generate & Refine Modes — Create from scratch or iterate on existing diagrams
- Streaming Preview — Watch diagrams build in real-time as AI generates
- Multi-Format Export — PNG, SVG, JSON, PDF, mxGraph XML
- Interactive Editing — Drag, resize, restyle any element after generation
- Template Library — Pre-built templates organized by category and difficulty
Design and simulate digital logic circuits with AI assistance.
- 36+ Logic Components — AND, OR, NOT, NAND, NOR, XOR, XNOR, flip-flops, multiplexers, and more
- Real-Time Simulation — Live signal propagation through your circuit
- Truth Table Generation — Automatically generate truth tables for any circuit
- Serial Monitor — Visualize output signals in real-time
- AI-Assisted Design — Describe a circuit in natural language, get a working design
- Drag-and-Drop Palette — Browse and place components from an organized component library
- Code Editor — Write HDL/behavioral descriptions alongside visual circuits
- Prompt History — Track and revisit previous AI-generated circuits
Build visual AI agent workflows with a node-based editor.
- Visual Node Editor — Drag-and-drop workflow builder for AI agent pipelines
- LLM Integration — Connect to multiple AI models in your workflows
- Tool & Data Source Nodes — Add API calls, data transformers, and tool nodes
- Export to TypeScript — Generate executable TypeScript code from your visual workflow
- Preset Workflows — Start from pre-built workflow templates
- Node Simulation — Test individual nodes and run full workflow execution
- AI-Assisted Generation — Describe your workflow, AI builds the node graph
- Settings & Configuration — Fine-tune model parameters and node behavior
Create ATS-optimized resumes and cover letters with AI.
- Professional Templates — Clean, recruiter-approved resume layouts
- ATS Optimization — Built-in ATS compliance checker ensures your resume passes automated screening
- AI Content Suggestions — Get AI-powered improvements for bullet points, summaries, and skills
- Cover Letter Builder — Generate tailored cover letters alongside your resume
- Multiple Document Management — Create, duplicate, and manage multiple resumes
- Import Existing Resumes — Upload and edit your current resume
- Live Preview — See changes in real-time as you edit
- One-Click Export — Download as PDF instantly
AI-powered brainstorming and visual note-taking.
- AI Brainstorming — Type a topic, AI expands it into a structured mind map
- Drag-and-Drop Canvas — Freely arrange and connect ideas
- Auto-Organize — One-click layout to clean up your mind map
- Hierarchical Notes — Nest ideas within parent nodes for structured thinking
- Export & Share — Download or share your mind maps
- Multi-Model Support — OpenAI GPT-4o, Claude, and custom models via OpenRouter
- Bring Your Own API Key — Use your own OpenAI, Anthropic, or OpenRouter API key to unlock unlimited AI generations
- Streaming Responses — Real-time generation with live preview
- Auto-Detection — AI automatically selects the best diagram type for your prompt
- Temperature Control — Fine-tune AI creativity for different use cases
- Infinite Canvas — Pan and zoom across unlimited workspace
- Global Style Settings — Edge colors, stroke widths, connector types
- Edge Path Types — Bezier curves, straight lines, smooth step, orthogonal step
- Snap-to-Grid — Precise alignment with configurable grid
- Helper Lines — Smart alignment guides when dragging elements
- Free Draw Mode — Sketch hand-drawn elements directly on canvas
- Presentation Mode — Full-screen slideshow of your diagrams
- Keyboard Shortcuts — Full shortcut support for power users
- Search & Find — Locate nodes and elements across large diagrams
- ELK Layout Panel — Advanced graph layout configuration
- Mind Map Layout Panel — Hierarchical layout controls
- Node Details Panel — Edit individual node properties, colors, shapes
- Icon Picker — Browse and search 1000+ icons
- Icon Image Replacer — Swap icons in existing diagrams
- Library Panel — Cloud asset management with S3 uploads
- Share Panel — Collaboration and sharing controls
- Prompt History — View and reuse previous AI generation requests
- Daily Notes — Side-panel note-taking while working
- React Flow <-> Excalidraw — Bidirectional conversion between canvas types
- React Flow -> Draw.io — Export to enterprise Draw.io format
- Draw.io -> React Flow — Import Draw.io diagrams
- Position Preservation — Maintain layout during format conversion
- Cloud Sync — Projects sync across devices for signed-in users
- Local Storage — Works offline with browser-based storage
- Project Templates — Start from pre-designed templates
- Favorites & Recents — Quick access to your most-used projects
- Bulk Operations — Select, duplicate, or delete multiple projects at once
- Duplicate Projects — Clone any project as a starting point
- Examples Gallery — Categorized examples for every editor (diagrams, circuits, resumes, workflows)
- Step-by-Step Guides — Tutorials organized by difficulty (beginner to advanced)
- Blog — Articles, tutorials, and tips with search functionality
Cloud Architecture [icon: cloud] {
Frontend [icon: react]
API Gateway [icon: server]
Auth Service [icon: lock]
}
Database Layer [icon: database] {
PostgreSQL
Redis Cache
}
Frontend > API Gateway
API Gateway > Auth Service
API Gateway > Database Layer
| Category | Technologies |
|---|---|
| Frontend | React, Next.js, TypeScript, Tailwind CSS |
| Canvas Engines | Excalidraw, React Flow, Draw.io (mxGraph) |
| Layout | ELK.js, Dagre, D3 |
| AI | OpenAI GPT-4o, Claude API, OpenRouter |
| Auth | Clerk |
| Database | PostgreSQL (Neon), Firebase |
| Payments | Paddle |
| Infrastructure | Docker, GitHub Actions |
| Page | URL |
|---|---|
| Live App | calcstack.co |
| Diagram Editor | calcstack.co/editor |
| Circuit Simulator | calcstack.co/circuit-editor |
| Workflow Builder | calcstack.co/ai-agent-editor |
| CV Builder | calcstack.co/cv-editor |
| Mind Maps | calcstack.co/notemap |
| AI Diagram | calcstack.co/ai-diagram |
| DSL Editor | calcstack.co/test-dsl |
| Examples | calcstack.co/examples |
| Guides | calcstack.co/guides |
| Blog | calcstack.co/blog |
| Pricing | calcstack.co/pricing |
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