Free Invoice Generator: Create and Print Invoices Online
This free invoice generator builds a professional, ready-to-send invoice right in your browser. Fill in your business details and line items on the left, watch the invoice take shape on the right, then print it, download it as a PDF from the print dialog, or copy it as plain text to paste into an email. Nothing you type is saved or sent anywhere.
Below the tool, this guide also covers what a complete invoice needs, the most common mistakes that slow down payment, and how Updoot turns this same invoice into part of a connected system that tracks a sale from time worked or items ordered all the way through to payment received.
Quick Answer
Fill in the fields below to generate an invoice with a live preview. It needs an invoice number, a date and due date, who it is billed to, a line-item list of what was delivered, and payment terms. Add a tax rate or a flat discount if either applies, then print, copy as text, or start over with Clear.
Key Takeaways
- This generator is free, requires no sign-up, and nothing you type leaves your browser.
- A complete invoice needs an invoice number, dates, both parties' details, line items, a total, and payment terms.
- Tax and discounts calculate automatically and appear as their own line on the invoice.
- If a purchase order exists for the sale, reference its PO number so accounts payable can match the two documents.
- Print directly from the page, or use your browser's print dialog to save the invoice as a PDF instead.
Table of Contents
What Every Invoice Needs
An invoice is the document that requests payment for goods or services already delivered, so it needs to give the person paying it everything they need to approve and process that payment without going back and forth. At minimum, that means a unique invoice number, the invoice date and a due date, your business name and contact details, the customer's billing information, a clear line-item list of what was delivered with quantities and prices, the total amount due, and your accepted payment methods.
If a purchase order was issued for the sale, the invoice should also reference that PO number. Accounts payable teams commonly match the invoice against the original PO before releasing payment, and an invoice missing that reference is one of the more common reasons a payment gets held up for clarification instead of paid on the first pass.
Free Invoice Generator
Fill in the fields below. The invoice on the right updates as you type. When it looks right, print it, copy it as plain text, or click Clear to start over.
Line Items
How to Use This Invoice Generator
- Add your business details. Your name, email, phone, and address appear at the top of the invoice as the sender.
- Fill in the invoice details. Give it a unique invoice number, set the invoice date and due date, and enter who it is billed to. Add the related PO number if one exists.
- List each item or service. Enter a description, quantity, and unit price for each line. Click "+ Add line item" for more rows; the subtotal updates automatically.
- Add tax or a discount if they apply. Enter a tax rate as a percentage, a flat dollar discount, or both. Leave either blank to skip it.
- Set your payment terms. Note when payment is due (e.g. Net 30), how you accept payment, and any notes for the customer.
- Print, copy, or clear. Print sends only the finished invoice to your printer or PDF, Copy as text puts a plain-text version on your clipboard, and Clear resets every field.
Common Invoice Mistakes That Delay Payment
Most late payments are not disputes, they are friction. A missing invoice number makes an invoice hard to reference in a reply. A due date left off, or buried in a payment-terms line the customer has to decode, gets treated as "whenever." Line items that are vague ("services rendered") instead of specific give an approver a reason to ask questions instead of approving on sight. And an invoice that should reference a PO number but does not is one of the most common reasons a payment gets kicked back for clarification instead of paid on the first pass.
The fix for all of it is the same: fill in every field, be specific on the line items, and make the total and the due date impossible to miss. That is exactly what this generator is set up to produce by default.
Stop rebuilding invoices from scratch
Updoot Purchasing and time tracking turn approved work straight into a numbered invoice, so it is never retyped from a template and always references the PO or hours it is billing for.
Start Free TodayDoing This Automatically With Updoot
This generator is a real improvement over building an invoice from a blank document every time, and it will serve a small business well for occasional use. But once invoicing happens every week, doing it by hand means re-typing the same customer details, re-entering line items that already exist somewhere else in a time sheet or purchase order, and manually checking that the invoice actually matches what was ordered or worked.
Updoot handles that automatically. Approved hours, completed projects, or a received purchase order can become a numbered invoice without anyone retyping it, and it stays linked back to the record it came from. It lives inside the same $5-per-user platform as time tracking, projects, purchasing, and HR, so a small business gets real invoicing without a separate tool bolted on the side.
Frequently Asked Questions
It is a browser-based tool that builds a professional invoice from the fields you fill in, with a live preview you can print, copy as text, or start over. It is free to use, with no sign-up, no watermark, and no limit on how many invoices you create.
No. Everything runs in your browser and nothing you type is saved or sent anywhere. If you close the page or refresh it, the fields clear, so print or copy your invoice before you navigate away.
A complete invoice needs an invoice number, the invoice date and due date, your business name and contact information, the customer's billing information, a line-item list of what was delivered with quantities and prices, the total due, and your payment terms and accepted payment methods.
Yes. The generator has a tax rate field that calculates tax on your line-item subtotal automatically, and a flat discount field that subtracts from the total before it is due. Both show up as their own line on the printed invoice.
Yes. There is an optional related PO number field. If your customer issued a purchase order for the work, entering that number on the invoice makes it easier for their accounts payable team to match the two documents before paying.