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Build interactive data apps with Python
Deploy anywhere. Minutes to build, zero JavaScript. Your data analysis becomes interactive instantly.
pip install preswald && preswald init my_appData App
Interactive Dashboard
Your data analysis becomes interactive instantly.
All Data
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Chart 1
Chart 2
Group A
Group B
Data Table
Item 1
123
Value A
Active
Item 2
456
Value B
Active
Item 3
789
Value C
Inactive
AI Assistant
ReadyThe missing link between data science and web apps
Stop struggling with JavaScript. Start building interactive web apps with Python.
Generate static sites
Run `preswald export` and get a complete static website. Deploy to any hosting platform without servers or complex infrastructure.
Runs anywhere, even offline
Your data stays on your computer. Perfect for sensitive data, air-gapped environments, or when you need to work offline.
Fast and reactive
Built on Python + DuckDB in the browser. Only re-runs what's needed, making complex apps feel instant.
Write in Python, not JavaScript
Use your existing Python skills. No need to learn web frameworks or JavaScript. Just write Python code.
Everything you need to build data apps
Powerful features that work together to create professional data applications
Full Python data stack
DuckDB for fast SQL queries, pandas for data manipulation, and all your favorite Python libraries. Handle large datasets efficiently.
Beautiful visualizations
Plotly, Matplotlib, and custom charts. Create interactive dashboards that respond to user input in real-time.
Interactive data tables
Sort, filter, and explore your data with built-in tables. Export results and drill down into specific data points.
AI-ready chat interface
Built-in chat components for natural language data exploration. Perfect for AI agents and conversational analytics.
Interactive controls
Sliders, dropdowns, text inputs, and checkboxes that automatically update your app. Build dynamic, responsive interfaces.
Works on any device
Automatic responsive design that looks great on desktop, tablet, and mobile. No additional configuration needed.
Deploy anywhere
Export apps as static sites and deploy to any hosting platform. No servers, no backend infrastructure needed.
Smart dependency tracking
Preswald automatically tracks what depends on what. Only recompute what's changed, making your apps fast and efficient.
Custom branding
Add your logo, colors, and styling to match your organization's brand. Professional appearance out of the box.
Get started in 3 minutes
Launch your first interactive data app in just a few simple steps.
1
Install instantly
Get up and running with a single command. No complex setup or dependencies. Just pure Python.
pip install preswald
2
Bootstrap your project
Generate a ready-to-edit app template. Start building with best practices and example code included.
preswald init my_data_app
3
Build, run & share
Write your logic in Python, preview changes live, and share your interactive app with a single export.
cd my_data_app
preswald run
preswald run
Perfect for these use cases
From data exploration to client delivery, Preswald handles it all
Analyst dashboards
Build interactive dashboards for stakeholders who need insights, not code. Deploy as static sites that update with new data.
Example: Sales performance dashboard with drill-down capabilities
Interactive reports
Deliver reports that update live based on user input. Perfect for quarterly reviews and executive presentations.
Example: Financial reporting with parameterized date ranges
Data exploration tools
Explore files, logs, or snapshots with purpose-built UIs. Great for debugging, research, and data discovery.
Example: Log analysis tool with filtering and visualization
Offline field kits
Package apps for fieldwork or secure environments. Perfect for research, compliance, and remote work.
Example: Field data collection with offline processing
Experiment panels
Compare runs, track metrics, and present results in standalone interactive apps. Ideal for ML/AI experimentation.
Example: Model comparison dashboard with performance metrics
AI agent tools
Give AI systems structured, modifiable tools. Apps are fully inspectable and programmable by agents.
Example: Data analysis assistant with conversational interface
Ready to build interactive web apps?
Join data scientists and analysts who are already using Preswald to create interactive, deployable data applications.