Flask-Assets
Asset management for Flask, to compress and merge CSS and Javascript files.
Decision gist · record as of 2026-08-14
Yes, if your Flask project has simple, stable asset needs and you are comfortable with dormant maintenance. The package is lightweight, permissive-licensed, and has no known vulnerabilities. If you require active support, modern tooling integration, or complex asset pipelines, consider a standalone build tool instead.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low install friction with only 2 runtime dependencies (Flask and webassets).
- Maintenance is dormant—last commit was 2023-12-15—so expect no active bug fixes or feature updates, though the repository remains publicly available.
License · maintenance · safety
BSD (permissive) — BSD license is permissive, allowing commercial and private use with minimal restrictions; you may use this package in most projects without licensing concerns.
last release 2023-10-22 (1027 days) · last repo commit 2023-12-15 · 460 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 188,829 downloads/mo, #9,937 on PyPI
Alternatives
Verify before relying
pip install Flask-Assets
from flask import Flask
from flask_assets import Environment, Bundle
app = Flask(__name__)
assets = Environment(app)
css_all = Bundle('css/style.css', filters='cssmin', output='gen/packed.css')
assets.register('css_all', css_all)- Whether webassets itself is actively maintained or has known limitations with modern CSS/JS tooling
- Whether the package works with current Flask versions beyond what classifiers indicate
What it is and what it does
Flask-Assets wraps the webassets library to handle CSS and JavaScript asset pipelines within Flask applications. It lets you define bundles of static files, apply filters (minification, compilation), and output optimized versions—reducing the number of HTTP requests and file sizes in production.
The package is straightforward: you create an Environment tied to your Flask app, define Bundles with source files and filters, and register them. It integrates cleanly with Flask's static file system. However, maintenance is dormant (last commit 2023-12-15), so it receives no active development; use it if your asset needs are stable and you don't require ongoing support.
Use it for
- Minify and merge CSS/JavaScript files in a Flask app to reduce HTTP requests and bandwidth in production.
- Compile SASS or LESS stylesheets to CSS as part of the Flask request/build pipeline.
- Bundle multiple JavaScript files into a single compressed output for faster page loads.
- Manage asset versioning and cache-busting by automatically generating output filenames.
- Integrate asset processing into a Flask development workflow without external build tools.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if your Flask project has simple, stable asset needs and you are comfortable with dormant maintenance.
The package is lightweight, permissive-licensed, and has no known vulnerabilities. If you require active support, modern tooling integration, or complex asset pipelines, consider a standalone build tool instead.
Install
flask-assets on PyPI
Before you install
Low install friction with only 2 runtime dependencies (Flask and webassets). Maintenance is dormant—last commit was 2023-12-15—so expect no active bug fixes or feature updates, though the repository remains publicly available.
License in practice
BSD license is permissive, allowing commercial and private use with minimal restrictions; you may use this package in most projects without licensing concerns.
Quickstart
pip install Flask-Assets
from flask import Flask
from flask_assets import Environment, Bundle
app = Flask(__name__)
assets = Environment(app)
css_all = Bundle('css/style.css', filters='cssmin', output='gen/packed.css')
assets.register('css_all', css_all)Verify before relying
- Whether webassets itself is actively maintained or has known limitations with modern CSS/JS tooling
- Whether the package works with current Flask versions beyond what classifiers indicate
Package facts
| License | BSD permissive |
| Python support | Not specified |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 2 packagesFlaskwebassets |
| Maintenance | Dormant 1,027 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 188,829 / month, #9,937 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Environment :: Web EnvironmentIntended Audience :: DevelopersLicense :: OSI Approved :: BSD LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3Topic :: Internet :: WWW/HTTP :: Dynamic ContentTopic :: Software Development :: Libraries :: Python Modules |
Evidence: Flask_Assets-2.1.0-py3-none-any.whl
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See also webassets · Flask-Minify · django-compressor · django-pipeline · django-libsass · pytest-html-merger · mkdocs-minify-plugin · django-vite · Frozen-Flask · litestar-htmx