Free GST Invoice Generator for Indian Businesses
Create professional, fully compliant GST tax invoices in seconds. Automatically calculate CGST, SGST, and IGST, print on A4/A5 sheets, and manage billing effortlessly 100% offline.
GST Rule 46 Compliant
Includes all required legal bill columns
Auto Tax Calculation
0%, 5%, 12%, 18%, 28% GST brackets
A4, A5 & Thermal Ready
Works with standard and POS printers
100% Offline Ready
Never get stuck during internet downtime
Live GST Invoice Calculator & Preview
Add items, adjust rates, and preview how fast GST invoices compute in OKBill:
Invoice Details
Shree Ganesh Enterprises
GSTIN: 24AABCP1234F1Z5
31/10/2026
| Item | HSN | Qty | Rate | Total |
|---|---|---|---|---|
| Cotton Fabric Roll | 5208 | 2 | ₹1,200 | ₹2,400 |
| Packaging Bags Box | 3923 | 5 | ₹450 | ₹2,250 |
How to Create a GST Invoice in 4 Easy Steps
With OKBill, billing takes seconds without requiring complex accounting knowledge:
Enter Business & Customer Details
Add your business name, address, and GSTIN. Select or quickly import customer details from your contacts list.
Add Items via Product Code or Name
Use OKBill’s innovative product code shortcut. Simply type the numeric item code and quantity to add items in milliseconds.
Automated Tax Split (CGST/SGST/IGST)
The system automatically recognizes intra-state vs inter-state sales and splits tax accurately into CGST/SGST or IGST.
Print A4/A5 or Share via SMS
Instantly print in A4 or A5 paper format via Bluetooth/WiFi printer, or share the invoice directly via SMS and WhatsApp.
Frequently Asked Questions
What is a GST Invoice Generator?
A GST Invoice Generator is a tool or software that automatically creates tax-compliant bills according to Indian GST law. It computes CGST, SGST, or IGST, applies HSN/SAC codes, and formats invoices to meet GST Rule 46 requirements.
Is OKBill GST Invoice Generator completely free?
Yes! OKBill is 100% free to download and use. There are no subscription fees, no credit card requirements, and it functions seamlessly offline without internet.
What is the difference between CGST, SGST, and IGST?
For intra-state transactions (within the same state), GST is split equally into CGST (Central GST) and SGST (State GST). For inter-state transactions (goods moving between two different states), Integrated GST (IGST) is applied.
Can I print invoices in both A4 and A5 formats?
Yes, OKBill supports flexible printing in standard full-page A4, compact half-page A5, and POS thermal receipts. You can also share PDF invoices directly via WhatsApp or SMS.
Start Creating GST Invoices in Seconds Today
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