BitBill

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  Invoice Output Page - The page showing the generated invoice and totals

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  Invoice Generator Form (input page) - Shows how users enter data and add items

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  Downloaded Text Receipt (.txt) - Shows your custom export feature

BitBill is a Python Flask web application that generates professional invoices using strict Object-Oriented Programming (OOP) principles.

• It features a dynamic JavaScript frontend for adding unlimited items, while the backend automatically calculates VAT, discounts, and change due.
• I implemented a custom feature that allows users to download a formatted .txt receipt, using Flask Sessions to persist data across requests without a database.
• The code is architected with a clear separation between business logic and routing, ensuring clean, testable, and maintainable code.

Built With

• css3
• flask
• html5
• javascript
• jinja
• linux
• python