Simple Invoice Generator
Create professional PDF invoices in seconds. No cloud storage.
Invoice Details
Line Items
$
Summary
Subtotal$500.00
Tax (10%)$50.00
Total$550.00
No Data Retention. All information remains local to your device session.
Freelancers and small businesses: create a professional invoice in minutes. Enter your details, add line items, and download a clean PDF — no sign-up, no subscription, and your financial data never leaves your browser.
Last Updated: May 6, 2025Privacy: 100% Local Browser Processing
What is the Invoice Generator?
The Invoice Generator is a lightweight tool for creating professional PDF invoices without needing a subscription, accounting software, or account registration. It handles basic tax calculations, multiple currencies, and unlimited line items, producing a clean, high-quality PDF that you can send directly to clients. All data processing happens in your browser — your financial information is never uploaded to any server.
How to Use
- 1Enter your business details and the client's information.
- 2Add line items with description, quantity, and price.
- 3Select your preferred currency ($/€/£ and more).
- 4Review the calculated subtotal, tax, and total.
- 5Click 'Download PDF' to generate the final document.
Pro Tips & Best Practices
- Include your business registration number and tax ID on the invoice if required in your jurisdiction — add them in the business details section.
- Always use a unique invoice number for each invoice — sequential numbering (INV-001, INV-002) is the standard practice for accounting records.
- Download the PDF immediately after creation — the tool does not save your data between sessions. Bookmark or save your invoice template details separately.
- For recurring invoices with the same line items, keep a template in a text file that you can paste in each time.
Real-World Use Cases
- Freelance billing — generate invoices for completed projects, hourly work, or retainer agreements to send to clients.
- Small business operations — create invoices for product sales, service agreements, or subscription renewals.
- Contractor payments — generate formal invoices for contract work submissions that require documentation.
- Quick quotations — use the invoice format to create price quotes or estimates for prospective clients.
Technical Deep Dive
The invoice generation pipeline starts with a structured data model: business details (name, address, email), client information, line items (description, quantity, unit price), tax rates, and currency. The tool calculates subtotals by multiplying quantity × unit price for each item, sums them for the subtotal, applies tax calculations, and computes the final total. The PDF is generated using jsPDF, a pure JavaScript PDF generation library that creates PDF documents programmatically by positioning text, lines, and shapes on a virtual page. The output follows a professional invoice template with proper typography hierarchy, aligned columns, and clear visual separation between sections. Multi-currency support is handled by storing the currency symbol alongside numeric values and formatting the output according to the selected currency's conventions.