Free GST Invoice Generator — Create Professional Invoices with UPI QR & Digital Signature

Creating a professional, GST-compliant invoice should not require accounting software subscriptions or Excel templates that break. Whether you are a freelancer in Bangalore, a small business in Mumbai, or a consultant billing international clients, you can now generate a complete tax invoice in under two minutes — with automatic GST calculation, a scan-to-pay UPI QR code, and your real signature on it. Completely free, right in your browser.

What Makes a GST Invoice Valid in India?

A legally compliant GST tax invoice must contain specific elements:

• Supplier name, address, and 15-digit GSTIN
• Sequential invoice number and date of issue
• Customer name, address, and GSTIN (for B2B invoices)
• Place of supply with state name and state code
• HSN code (goods) or SAC code (services) for each item
• Taxable value, GST rate, and tax amount per item
• CGST + SGST for intra-state sales, or IGST for inter-state sales
• Total invoice value in figures and in words
• Signature or digital signature of the supplier

CGST + SGST vs IGST — Which Applies to Your Invoice?

This is the most common GST invoicing mistake. The rule is simple: if you and your buyer are in the same state, the tax splits into CGST (central) and SGST (state) — half each. If you are in different states, the full tax is charged as IGST (integrated). For example, an 18% GST sale within Maharashtra is billed as 9% CGST + 9% SGST. The same sale from Maharashtra to Karnataka is billed as 18% IGST. A good invoice tool detects this automatically from the state codes so you never file incorrectly.

Features of the WowShortcuts Invoice Generator

• Automatic CGST/SGST/IGST: select your state and the client's state — the correct tax split is applied automatically
• Per-item GST rates: mix 5%, 12%, 18%, and 28% items on the same invoice with a correct per-rate breakdown
• HSN/SAC summary table: the compliance table GST officers expect, generated automatically
• GSTIN validation: instant format checking that also verifies the state code inside the GSTIN matches your selected state
• UPI scan-to-pay QR code: your client scans the QR with GPay, PhonePe, or Paytm and the exact invoice amount is pre-filled
• Digital signature: draw with your mouse or finger, type your name in a signature font, or upload your real signature — then drag it anywhere on the invoice
• Amount in words: automatic conversion including Lakh and Crore formatting for INR
• Client book: save your clients once, load them with one click on every new invoice
• Invoice history: every invoice is saved in your browser — reopen, duplicate with auto-incremented numbers, or mark as PAID
• Status stamps: mark an invoice as Paid and a green PAID stamp is printed across it
• 30+ currencies: INR, USD, EUR, GBP, AED, SGD and more with correct local formatting
• 6 document types: Tax Invoice, Invoice, Proforma Invoice, Quotation, Receipt, and Credit Note

How to Create a GST Invoice in 5 Steps

1. 1Open the WowShortcuts Invoice Generator and fill in your business details with your GSTIN and state — these are remembered for next time.
2. 2Add your client (or load a saved one) including their state — intra/inter-state tax is detected automatically.
3. 3Add line items with HSN/SAC codes, quantities, rates, and the GST rate for each item.
4. 4Add your UPI ID for the scan-to-pay QR code, and add your signature (draw, type, or upload — then drag to position).
5. 5Click Download PDF. The invoice is saved to your history automatically.

Why a UPI QR Code on Your Invoice Gets You Paid Faster

The hardest part of freelancing is not the work — it is getting paid. When your invoice includes a UPI QR code with the amount pre-filled, your client can pay the moment they open the PDF: scan, confirm, done. No typing account numbers, no IFSC lookups, no "I'll do the bank transfer this weekend." Invoices with embedded payment options are typically paid significantly faster than invoices that require manual bank transfers.

Is It Safe to Create Invoices Online?

With WowShortcuts, yes — and here is why it is different from other invoice websites: everything runs in your browser. Your business details, client information, invoice amounts, bank details, and signature never leave your device. There is no account, no server-side storage, and no database that could be breached. Your invoice data is stored only in your own browser's local storage, under your control.

Conclusion

A professional invoice builds trust, gets you paid faster, and keeps you GST-compliant. With automatic tax calculation, UPI scan-to-pay, digital signatures, and complete privacy, the WowShortcuts Invoice Generator gives freelancers and small businesses everything paid invoicing software offers — free, with no signup and no watermarks.