Bill your customers with a professional invoice in minutes. Enter your business details, the customer’s information, the due date and the line items — the tool calculates the subtotal, discount, 7% VAT, withholding tax and converts the total into Thai words automatically. Add your bank account or PromptPay details so customers can pay you easily, all shown in a beautifully designed live document preview. Add your logo, then print or save as a PDF. Everything runs in your browser; your data never leaves your device. Free, no sign-up required.
The preview below updates instantly. Click “Print” and choose Save as PDF.
Your logo
Invoice
ใบแจ้งหนี้
No.
—
Date
—
Due date
—
From
Example Co., Ltd.
Bill to
Customer Co., Ltd.
#
Description
Qty
Unit price
Amount
Amount in words
—
Subtotal฿ 0.00
Discount฿ 0.00
VAT 7%฿ 0.00
Withholding tax฿ 0.00
Amount due฿ 0.00
How to use
Enter your business name, address, tax ID and upload a logo (optional)
Fill in the customer’s details, the invoice number, issue date and due date
Add line items with quantity and unit price
Set a discount, toggle 7% VAT and choose a withholding-tax rate — the net total recalculates instantly
Enter your bank account or PromptPay details in the payment section
Click “Print / Save PDF” and choose Save as PDF or send it to a printer
Features
Live WYSIWYG document preview that updates as you type
Automatic subtotal, discount (฿ or %), 7% VAT and withholding-tax calculation
Converts the total into Thai words automatically
Bank / PromptPay payment details shown on the invoice for easy transfer
Add your company logo, then print or save as a clean A4 PDF
Runs 100% in your browser — your data never leaves your device
Frequently asked questions
Can I save the invoice as a PDF?
Yes. Click “Print / Save PDF” and in the print dialog choose “Save as PDF” as the destination. You get a clean A4 PDF containing only the document, without any website menus — ideal for emailing the invoice to a customer.
Does it calculate withholding tax (WHT)?
Yes. Choose a withholding-tax rate of 1%, 1.5%, 2%, 3% or 5%. It is deducted from the amount after discount and the net amount due is shown automatically — handy for services where the client withholds tax at source.
Can I show bank or PromptPay details for the customer to pay?
Yes. Enter your bank account number or PromptPay ID in the “Payment details” field and it appears in the “Payment to” box on the invoice, so customers know exactly where to transfer.
How is an invoice different from a tax invoice?
An invoice is a bill requesting payment from a customer, while a tax invoice is a tax document that follows the Revenue Department’s requirements. To issue a tax invoice or receipt, use the dedicated tool for that document.
Is my data sent to a server?
No. Everything is processed in your browser — customer details, line items, payment info and the logo. Nothing is uploaded or stored on a server.
