Flask-JSON

Flask-JSON is a simple extension that adds better JSON support to Flask application.

Features:

Works on python 3.3+ and Flask 2.2+.
More ways to generate JSON responses (comparing to plain Flask).
Extended JSON encoding support.

Usage

Here is fast example:

from datetime import datetime
from flask import Flask
from flask_json import FlaskJSON, JsonError, json_response, as_json

app = Flask(__name__)
FlaskJSON(app)


@app.route('/get_time')
def get_time():
    return json_response(time=datetime.utcnow())


@app.route('/get_time_and_value')
@as_json
def get_time_and_value():
    return dict(time=datetime.utcnow(), value=12)


@app.route('/raise_error')
def raise_error():
    raise JsonError(description='Example text.', code=123)


if __name__ == '__main__':
    app.run()

Responses:

GET /get_time HTTP/1.1

HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 60

{
  "status": 200,
  "time": "2015-04-14T13:17:16.732000"
}

GET /raise_error HTTP/1.1

HTTP/1.0 400 BAD REQUEST
Content-Type: application/json
Content-Length: 70

{
  "code": 123,
  "description": "Example text.",
  "status": 400
}