redrx

A modern, high-performance, and feature-rich self-hosted URL shortener built with Flask, PostgreSQL, Redis, and SQLAlchemy. Features custom QR codes, link rotation, local MaxMind GeoIP analytics, automatic phishing link screening, and strict security hardening. Maintained by arumes31 on GitHub, where it has earned 31 stars from the community.

It's actively developed around dark-theme, flask, geoip, and is a solid reference for anyone building with these tools.