Privacy-first, offline Gantt chart for project planning. Own your data.
OwnChart is a browser-based Gantt chart application that respects your privacy. No cloud, no tracking, no accounts. Your data stays on your device.
Use OwnChart now: ownchart.app
No installation needed — open the app and start planning. Your data stays in your browser's local storage, or save it as a .ownchart file to keep full control.
- 100% Local — All data stays on your device, nothing is sent to any server
- Zero Tracking — No analytics, no telemetry, no cookies
- No Accounts — No sign-up, no login, no email required
- File-Based — Save/load
.ownchartfiles you own and control - Open Source — Fully auditable MIT-licensed code
- Drag-to-Move & Resize — Interactive task bars on the timeline
- Task Dependencies — Finish-to-Start links with automatic date propagation
- Multi-Task Drag — Move all selected tasks together
- Summary Task Drag — Moving a summary moves all its children
- Infinite Scroll — Timeline auto-extends as you scroll past/future
- Zoom — 5% to 300% with cursor-centered anchoring
- Task Hierarchy — Summaries, milestones, and regular tasks (3 levels deep)
- Multi-Select — Ctrl/Shift+Click or rectangular marquee selection
- Copy/Paste — Cross-tab clipboard with dependencies preserved
- Insert Tasks — Add above/below with toolbar buttons or placeholder row
- Undo/Redo — 100-step command history for all operations
- PNG Export — High-resolution raster images
- PDF Export — Vector graphics that scale perfectly for large prints
- SVG Export — Editable vector output
- Live Preview — Figma-style export dialog with real-time preview
- Page Options — A4, A3, Letter, Legal, Tabloid with orientation and margins
- 5 Color Modes — Manual, Theme, Summary Group, Task Type, Hierarchy
- UI Density — Compact, Normal, or Comfortable row heights
- Holiday Support — 199 countries with timeline highlighting
- Working Days Mode — Business day calculations for scheduling
- Task Labels — Position before, inside, after, or hide labels
- View Toggles — Show/hide today marker, weekends, holidays, dependencies, progress
- Ribbon UI — MS Office-style tabbed interface (File, Task, View, Help)
- Keyboard Shortcuts — Efficient navigation and editing
- Help Panel — Built-in shortcut reference (press
?) - Welcome Tour — Guided introduction for first-time users
- Security — 6-layer file validation against XSS/injection
| Shortcut | Action |
|---|---|
Ctrl+Z |
Undo |
Ctrl+Shift+Z / Ctrl+Y |
Redo |
Ctrl+C / Ctrl+V / Ctrl+X |
Copy / Paste / Cut |
Ctrl+A |
Select all tasks |
Del |
Delete selected tasks |
Tab / Shift+Tab |
Indent / Outdent |
F |
Fit timeline to view |
T |
Toggle today marker |
D |
Toggle dependencies |
P |
Toggle progress |
H |
Toggle holidays |
? |
Open help panel |
| Browser | Minimum Version |
|---|---|
| Chrome / Edge | 90+ |
| Firefox | 88+ |
| Safari | 14+ |
Works on Windows, macOS, and Linux.
# Clone the repository
git clone https://github.com/kitikonti/ownchart.git
cd ownchart
# Install dependencies
npm install
# Start development server
npm run devOpen http://localhost:5173 to start developing.
- React 18 — UI framework with hooks
- TypeScript — Type-safe development
- Zustand — Lightweight state management
- TailwindCSS — Utility-first styling
- Vite — Lightning-fast build tool
- D3.js — Timeline rendering
- Vitest + Playwright — Comprehensive testing
npm run dev # Start dev server
npm run build # Production build
npm run preview # Preview production build
npm run lint # Lint code
npm run format # Format with Prettier
npm run type-check # TypeScript validation
npm run test:unit # Unit tests with coverage
npm run test:e2e # E2E tests with Playwright
npm run ci:local # Run all checks (pre-commit)
npm run release # Create new release with changelogownchart/
├── src/
│ ├── components/ # React components
│ ├── store/ # Zustand state slices
│ ├── utils/ # Helper functions
│ ├── types/ # TypeScript definitions
│ └── hooks/ # Custom React hooks
├── tests/ # Unit, integration, E2E tests
├── docs/ # Comprehensive documentation
└── CLAUDE.md # AI assistant guide
Comprehensive documentation is available in the /docs folder:
- Product Requirements — Vision and requirements
- Roadmap — Development phases
- Technical Architecture — System design
- Data Model — Data structures
- Testing Strategy — QA approach
- CI/CD Pipeline — Deployment process
OwnChart is designed with privacy as the foundation:
- Zero Telemetry — No analytics, no tracking
- Local-Only — No data ever leaves your device
- No Accounts — No sign-up, no login required
- File Validation — 6-layer security pipeline (XSS, prototype pollution prevention)
- Open Source — Fully auditable code
v1.0 milestone reached — OwnChart is stable and feature-complete for professional Gantt chart creation and editing. See the changelog for details.
Next Up (V1.1):
- Advanced dependencies (Start-to-Start, Finish-to-Finish, Start-to-Finish)
- Custom fields UI
- Multi-project management
- Named snapshots
See the Roadmap for the full development plan.
Contributions are welcome! Please read our contributing guidelines before submitting PRs.
Development Workflow:
- Fork the repository
- Create your feature branch (
git checkout -b feature/amazing-feature) - Commit your changes (
git commit -m 'feat: add amazing feature') - Push to the branch (
git push origin feature/amazing-feature) - Open a Pull Request
Commit Convention: We use Conventional Commits for automated changelog generation.
MIT License — Feel free to use OwnChart for any purpose.
- App: ownchart.app
- Repository: github.com/kitikonti/ownchart
- Issues: Report a bug or request a feature
- Changelog: See what's new
Built with care for privacy-conscious project managers.
OwnChart — Because your project data belongs to you, not in someone else's cloud.