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Minify flask text/html mime type responses. Just add MINIFY_HTML = True to your deployment config to minify HTML and text responses of your flask application.


To install Flask-HTMLmin, simply use pip:

pip install Flask-HTMLmin

Or use pipenv:

pipenv install Flask-HTMLmin

Or use poetry:

poetry add Flask-HTMLmin

Or alternatively, you can download the repository and install it manually by doing:

git clone
cd Flask-HTMLmin
python install


from flask import Flask, render_template
from flask_htmlmin import HTMLMIN
app = Flask(__name__)
app.config['MINIFY_HTML'] = True

htmlmin = HTMLMIN(app)
# or you can use HTMLMIN().init_app(app)
# pass additional parameters to htmlmin
# HTMLMIN(app, **kwargs)
# example:
# htmlmin = HTMLMIN(app, remove_comments=False, remove_empty_space=True, disable_css_min=True)

def main():
    # index.html will be minimized !!!
    return render_template('index.html')

def exempted_route():
    # index.html will be exempted and not blessed by holy htmlmin !!!
    return render_template('index.html')

if __name__ == '__main__':


  • Test cases
  • Route (or URL rule) exemption
  • Caching (in progress)
  • Minify inline CSS
  • Minify inline Javascript
  • Type hints