What is an Online Invoice Generator?
An online invoice generator is a web-based tool that lets you fill in your business details, add line items, apply GST, and download a professional PDF — without installing any software. The best ones support Indian GST formats, CGST/SGST/IGST calculations, and let you customise your logo and brand colours.
How to Create a Free Invoice in 60 Seconds
- 1Open the invoice generator — no signup required on Bizflow's free tool
- 2Enter your business details — name, address, GSTIN
- 3Add buyer details — name, address, and GSTIN for B2B invoices
- 4Add line items — description, HSN code, quantity, rate
- 5Select GST rate — 5%, 12%, 18%, or 28% — the tool auto-calculates CGST+SGST or IGST
- 6Preview and download PDF — or send directly via WhatsApp or email
Features to Look for in a Free Invoice Generator
- GST-compliant format with CGST, SGST, and IGST support
- HSN/SAC code lookup built in
- Multiple invoice templates and branding options
- PDF download and WhatsApp sharing
- Invoice history and client database
- Payment tracking — mark invoices as paid or unpaid
- No watermark on downloaded invoices
Free vs Paid Invoice Software
Free invoice generators are ideal for freelancers and micro-businesses with low invoice volume. As your business grows, you'll benefit from paid features like:
- Recurring invoices and automated payment reminders
- Multi-user access for your accountant and sales team
- Integrated online payments — UPI, cards, net banking
- e-Invoice generation (mandatory above ₹5 crore turnover)
- Expense tracking and real-time profit & loss reports
- GSTR filing data export
Start with Bizflow — Free Forever
Bizflow's free plan lets you create unlimited invoices, manage up to 50 clients, and download PDFs without any watermarks. Upgrade only when you need advanced features like recurring billing, POS, or expense management.