---
id: flask-bootstrap
version: "3.3.7.1"
license: BSD
license_treatment: permissive
maintenance: dormant
---

# Flask-Bootstrap — An extension that includes Bootstrap in your project, without any boilerplate code.

License: permissive · Maintenance: dormant · Downloads: 441.1K/mo

## What it is and what it does

Flask-Bootstrap is a Flask extension that bundles Bootstrap into your application, eliminating the need to manually download or link Bootstrap resources. It provides a blueprint with pre-built template blocks where you can inject your content, and can serve Bootstrap either from your application or from a CDN.

The extension is straightforward to use—a single call to Bootstrap(app) makes templates available—but it has been dormant since 2017-01-11. While the repository remains accessible and has accumulated 1562 stars, there have been no releases for an extended period. This age raises questions about compatibility with recent Flask versions, modern Bootstrap releases, and current Python versions, particularly since the package declares no explicit Python version requirement.

Use it for:

- Quickly add Bootstrap styling to a Flask prototype or small project without manually managing CSS and JavaScript files.
- Create Flask applications with pre-styled templates that include Bootstrap's grid, components, and utilities out of the box.
- Serve Bootstrap from a CDN in Flask templates without writing custom link tags or managing static file paths.
- Build internal tools or admin dashboards where Bootstrap 3's styling is sufficient and rapid setup is prioritized.

## Worth the install?

AI-flagged interpretation of the facts above — verify before relying.

Flask-Bootstrap packages Bootstrap CSS and JavaScript into a Flask extension, providing pre-built templates and CDN links to add Bootstrap styling to web applications with minimal setup.

No—install friction is high, maintenance is dormant (last release 2017-01-11), and compatibility with modern Flask, Bootstrap, and Python versions is unverified. For new projects, use a modern Flask template engine or a current Bootstrap integration. For legacy applications already using this package, it may still work, but upgrading is strongly recommended.

## Install

pip install flask-bootstrap
uv add flask-bootstrap
poetry add flask-bootstrap

## Installing Flask-Bootstrap

Before you install: High install friction due to a single large source distribution. Maintenance is dormant—last release was 2017-01-11, with no updates since then, though the repository remains accessible with 1562 stars and a final commit in 2023-11-06.

License in practice: Licensed under BSD (permissive), which allows commercial and private use with minimal restrictions. No notable licensing constraints for most projects.

Quickstart:

pip install Flask-Bootstrap==3.3.7.1

from flask import Flask
from flask_bootstrap import Bootstrap

app = Flask(__name__)
Bootstrap(app)

Requires Flask; no explicit Python version constraint declared, though classifiers indicate Python 2 and 3 support.

Verify before relying:

- Whether Flask-Bootstrap 3.3.7.1 is compatible with current Flask versions and modern Python releases.
- Whether Bootstrap 3 (packaged by this extension) meets current web design and accessibility standards.
- Whether the pre-built templates and CDN approach align with modern Flask project structures.
- Whether dormancy since 2017-01-11 indicates abandonment or stable maintenance.

## Package facts

- License: BSD (permissive)
- Python support: unspecified
- Install friction: high
- Maintenance: dormant
- Downloads: 441.1K/month (top 15,000 on PyPI)
- Known vulnerabilities: none known

## Tags

flask bootstrap integration, bootstrap css flask templates, flask web ui framework, bootstrap cdn flask, flask frontend templates, flask-extension, bootstrap-integration, dormant

[View on SkillFed](https://skillfed.io/packages/flask-bootstrap) · [View on PyPI](https://pypi.org/project/flask-bootstrap/)