pip install preswald && preswald init my_app

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_app

Interactive Dashboard

Your data analysis becomes interactive instantly.

Filter

All Data ▼

Range

50%

A B C D E F

Group A

Group B

Item 1

123

Value A

Active

Item 2

456

Value B

Active

Item 3

789

Value C

Inactive

Show me the data

Here’s your interactive data analysis. You can filter, sort, and explore the results.

The 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

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.