StructuredLabs/preswald
Preswald is a WASM packager for Python-based interactive data apps: bundle full complex data workflows, particularly visualizations, into single files, runnable completely in-browser, using Pyodide, DuckDB, Pandas, and Plotly, Matplotlib, etc. Build dashboards, reports, and notebooks that run offline, load fast, and share like a document. observed · 2026-08-28
Health v2 · maintenance only
62/100
- Activity 87
- Release rhythm 40
- Longevity 44
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 4
- age_days: 627
- days_rel: 454
- days_push: 83
- n_releases_24m: 26
Adoption not part of the score
4279 stars · 648 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Preswald is a Python framework and static-site generator for building interactive data apps that bundle compute, data access, and UI into a single self-contained HTML file. It runs entirely in the browser via a WASM runtime (Pyodide, DuckDB), requiring no server or local dependencies and working offline.
Use cases
- build interactive dashboards in python
- share a data report as a single html file
- run data analysis offline in the browser
- package a pandas/duckdb workflow for a stakeholder
- create a self-contained data notebook
- prototype data apps without a backend server
- keep sensitive data analysis fully local
When to choose
- you need to distribute a data app as one shareable file
- recipients shouldn't install anything or run a server
- data privacy requires fully local, offline execution
- you want reactive python dashboards with built-in UI components
When to avoid
- you need a multi-user server-backed web application
- your datasets are too large for in-browser WASM memory
- you need heavy server-side compute or database connections
- you require fine-grained control over frontend JS frameworks
Facets
framework · maturity active
data-visualization static-site-generator web-framework charts wasm analytics data-visualization data-science web-development analytics developer-tools python browser wasm cross-platform pyodide duckdb single-file-apps offline-apps dashboards data-apps reactive-ui
2 sources
- readme: https://github.com/StructuredLabs/preswald · fetched 2026-08-28 · 29ea9a0d446f
- homepage: https://www.preswald.com/ · fetched 2026-08-29 · 600086e7f8a5
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| StructuredLabs/preswald | main | 62 |
For agents
markdown · JSON · MCP: product_card(name="StructuredLabs/preswald")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem