100% Client-Side • Formula-Backed Excel • Clean Print PDF

Free Invoice Generator & Excel Exporter

Build and download professional invoices in seconds. Exports genuinely formula-backed Microsoft Excel (.xlsx) spreadsheets and print-ready PDF formats without login walls.

Generate Professional Invoices Offline in Your Browser

How does client-side invoice generation work? Client-side invoice generation calculates line item subtotals, VAT or regional sales tax, and balance totals directly in browser memory without sending customer billing records to a web server. When exporting to Microsoft Excel, the tool embeds active spreadsheet formulas (such as =SUM() and multiplication operators) directly into the generated .xlsx file for effortless future adjustments.

Freelancers, independent contractors, and agency founders frequently need to issue quick, professional billing invoices without subscribing to expensive accounting SaaS platforms or exposing client rates to third-party databases. Traditional invoice generators often place watermarks on documents, demand account registration, or store sensitive business numbers on external servers.

TabKit Tools provides an open, private alternative. Enter your business details, bill-to client credentials, line item hours or project deliverables, and applicable taxes. You can immediately print to PDF or download an editable Excel sheet ready for corporate accounting records.

Frequently Asked Questions

Does the downloaded Excel file contain active formulas?

Yes. Unlike converters that only output static numerical strings, TabKit exports valid spreadsheet formulas so that modifying quantity or unit rate values inside Excel automatically recalculates the line totals and final balance due.

Are my client addresses or invoice amounts saved to a database?

No. TabKit is strictly client-side. No customer names, tax IDs, or invoice figures ever leave your local computer. All rendering is performed directly in your browser.

How can I save the invoice as a PDF file?

Click the "Print / PDF" button. In your browser's print dialog, select "Save as PDF" as the destination printer. The document includes dedicated print CSS to remove UI buttons and output a clean, single-page business invoice.