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100% free · no signupRuns in your browser

Invoice Generator

Create professional invoices with itemized billing, tax and totals.

Best for: Billing clients as a freelancer or small business, invoicing one-off sales, or replacing spreadsheet invoices with something presentable.

Complete guide
Currency / Country:

Input

Items

How it's calculated & sources
The Invoice Generator uses the standard formula for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Figures are educational estimates, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

How it works

Subtotal = Σ(qty × price)

Tax = Subtotal × Tax% · Total = Subtotal + Tax

Example

2 hours of consulting at $100/hr + 1 design package at $300 = $500 subtotal. With 10% tax, total invoice = $550.

Frequently asked questions

Is this invoice legally valid?+

Yes for most regions, as long as it includes your business name, client details, date, itemized charges and totals.

Can I save the invoice as a PDF?+

Use Copy and paste into any document editor, or use your browser's Print → Save as PDF.

Do I need to charge tax?+

It depends on your jurisdiction, registration status and the type of service. Check with a local accountant.

Continue your journey

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Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Invoice?
The Invoice Generator creates a professional, itemized invoice as a PDF — line items, quantities, rates, tax and totals — ready to send to a client.
Why does Invoice matter?
A complete, dated record of what you're charging and why. The total is what the client owes; the itemization is what prevents disputes.
How is Invoice calculated?
You fill in your business details, the client's details and each billable line; the tool computes line amounts, applies your tax rate, totals everything and lays it out as a clean A4 PDF in your browser. Formula: line amount = qty × rate; subtotal = Σ lines; total = subtotal + tax − discount.
What are common invoice mistakes?
Reusing an invoice number — duplicates wreck reconciliation and look unprofessional.
When should you use the Invoice Generator?
Billing clients as a freelancer or small business, invoicing one-off sales, or replacing spreadsheet invoices with something presentable.

What is the Invoice Generator?

The Invoice Generator creates a professional, itemized invoice as a PDF — line items, quantities, rates, tax and totals — ready to send to a client.

How the Invoice Generator works

You fill in your business details, the client's details and each billable line; the tool computes line amounts, applies your tax rate, totals everything and lays it out as a clean A4 PDF in your browser.

line amount = qty × rate; subtotal = Σ lines; total = subtotal + tax − discount
  1. Enter your business name and details, and the client's.
  2. Set an invoice number and date — keep numbers sequential for clean bookkeeping.
  3. Add each line item with quantity and rate; the amounts total automatically.
  4. Apply tax (GST/VAT/sales tax) and any discount.
  5. Download the PDF and send it; save a copy for your records.

Common mistakes to avoid

  • Reusing an invoice number — duplicates wreck reconciliation and look unprofessional.
  • Leaving off payment terms and due date; 'net 15/30' sets expectations.
  • Forgetting tax registration numbers (GSTIN/VAT ID) where law requires them on invoices.
  • Not keeping your own copy — you'll need it at tax time.

Reviewed sources & methodology

Methodology: Industry Standard · Last reviewed June 2026.

Keywords: invoice, billing, freelance.

Generated entirely in your browser. Check your local invoicing rules (tax IDs, required fields) — requirements vary by country.

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Invoice Generator free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Invoice Generator?+

Invoice Generator uses the standard invoice formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Invoice Generator runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Invoice Generator on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Also worth a look

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Share & publish

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Share-to-grow kit (Reddit, LinkedIn, Medium)
Reddit post
Title: I built/used this free invoice generator — instant, no signup

Body: Create professional invoices with itemized billing, tax and totals. Try it: https://freetoolsgalaxy.com/tools/invoice-generator
LinkedIn post
Invoice Generator on Free Tools Galaxy — Create professional invoices with itemized billing, tax and totals. https://freetoolsgalaxy.com/tools/invoice-generator
Medium intro
# Invoice Generator — the free tool I keep coming back to

Create professional invoices with itemized billing, tax and totals.

Try it: https://freetoolsgalaxy.com/tools/invoice-generator
Quora answer
The fastest way is to use a free in-browser invoice generator: https://freetoolsgalaxy.com/tools/invoice-generator. Create professional invoices with itemized billing, tax and totals.

Embed this tool anywhere

Free embed code for blogs, docs and dashboards. Every embed sends a backlink home — helping you and the galaxy grow together.

HTML iframe
Drop into any site — auto-resizes to its content height, theme-aware.
<iframe src="https://freetoolsgalaxy.com/tools/invoice-generator?embed=1" title="Invoice Generator" loading="lazy"
  style="width:100%;height:600px;border:0;border-radius:16px;background:#0b1020"
  allow="clipboard-write"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="ftg-embed-height"){document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source){f.style.height=e.data.height+"px";}});}});</script>
<p><a href="https://freetoolsgalaxy.com/tools/invoice-generator" target="_blank" rel="noopener">Powered by Invoice Generator on Free Tools Galaxy</a></p>
Responsive wrapper
Aspect-locked container — good for blog post bodies.
<div style="position:relative;padding-bottom:75%;height:0;overflow:hidden;border-radius:16px">
  <iframe src="https://freetoolsgalaxy.com/tools/invoice-generator?embed=1" title="Invoice Generator" loading="lazy"
    style="position:absolute;inset:0;width:100%;height:100%;border:0" allow="clipboard-write"></iframe>
</div>
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Paste in a custom-HTML block or markdown file.
[Invoice Generator — free online tool](https://freetoolsgalaxy.com/tools/invoice-generator)

<iframe src="https://freetoolsgalaxy.com/tools/invoice-generator?embed=1" width="100%" height="600" frameborder="0"></iframe>
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Minimal credit link — best for sidebars and footers.
<a href="https://freetoolsgalaxy.com/tools/invoice-generator" target="_blank" rel="noopener">Try the free Invoice Generator</a>

Share-to-Grow Kit

Pre-written, ready-to-paste posts for every major channel. Help others discover this tool — and earn backlinks.

Title
I built a free word counter that works instantly in the browser — no signup, no ads in your face
Body
Hey r/[subreddit],

I kept needing a quick word counter and most options online were slow or behind paywalls, so I built one that:

• Runs 100% in your browser (your data never leaves your device)
• No signup, no email wall, no popups
• Loads in under a second on mobile

It covers the standard word counter use cases (count, words, characters) and links out to the formula + worked examples if you want to learn the math.

Link: https://freetoolsgalaxy.com/tools/word-counter

Happy to take feedback — what's missing?
Post to a relevant subreddit (e.g. r/InternetIsBeautiful, r/webdev, r/productivity). Avoid spammy subs.
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