Build Full‑Stack Python Apps in Minutes with Replit’s New replit.web Framework

Replit enables developers to quickly build applications. With the new replit.web Python framework, you can launch a server, store data in Repl DB, and authenticate users with Repl Auth without manually wiring components.

Quick start example

import flask
from replit import db, web

app = flask.Flask(__name__)
users = web.UserStore()

@app.route("/")
@web.authenticated
def index():
    hits = users.current.get("hits", 0) + 1
    users.current["hits"] = hits
    return f"You have visited this page {hits} times"

web.run(app)

Repl Auth

Repl Auth is the built‑in authentication system for every Replit app. The replit.web library extends Flask, allowing you to protect routes with the @web.authenticated decorator and access the current user via web.auth.name.

@app.route("/")
@web.authenticated
def index():
    return f"Hello, {web.auth.name}"

Repl DB

Repl DB provides a fully managed cloud database for each repl, usable like a normal Python dict and supporting nested structures.

db["bob"] = {"score": 0}
db["bob"]["score"] += 100
db["bob"].get("friends", []).append("Alice")
print(db["bob"])  # => ObservedDict(value={'score': 100, 'friends': ['Alice']})

The framework also offers utilities such as rate limiting and parameter validation. The demo app ReplTweet, a Twitter‑like prototype for Replit users, is built in about 150 lines of code.

For more details, see the documentation at https://replit-py.readthedocs.io/en/latest/index.html .