Invoice Builder
Everything you need to invoice professionally
A full-featured builder that works right in your browser. No installation, no account, no friction.
Document Types
Pick the right document. Generate it free.
Twelve GST-compliant document types — each pre-configured for the correct format and rules, ready to download as a PDF.
Tax Invoice
Standard GST invoice with CGST/SGST/IGST split and ITC eligibility.
Generate →📋Proforma Invoice
Pre-sale quote / estimate with GST indication and validity period.
Generate →↩️Credit Note
Reduce output GST for returns, post-sale discounts, or overcharge.
Generate →🚚Delivery Challan
For goods movement without sale — job work, branch transfer, approval.
Generate →📄Bill of Supply
For composition dealers and exempt supplies — no GST charged.
Generate →↗️Debit Note
Increase output GST for undercharge, price escalation, or additional supply.
Generate →🌐Export Invoice
Zero-rated export invoice — LUT or IGST-with-refund, foreign currency.
Generate →🧾Receipt Voucher
Issued on advance payments — GST applies on service advances.
Generate →↵Refund Voucher
Refunds an advance and reverses the GST from the receipt voucher.
Generate →🔁Payment Voucher
For reverse charge (RCM) — buyer issues voucher to unregistered supplier.
Generate →🪞Self-Invoice
Buyer issues to self for RCM purchases — required to claim ITC.
Generate →✏️Revised Invoice
Cover sales between GST application date and certificate date.
Generate →GST Intelligence
Built for Indian tax compliance
GST math is handled automatically. Set your place of supply and the app does the rest — every time.
HSN / SAC codes
8-digit for goods, 6-digit for services — shown on PDF as required.
Amount in words
"Rupees Forty-Seven Thousand Only" — auto-generated in Indian English.
Reverse charge
Toggle reverse charge — the flag appears on the invoice as required.
Zero-rated & exempt
Export invoices and Bill of Supply handled correctly, zero-GST automatically.
UPI QR on invoice
Add your UPI ID — a scannable QR code prints on every invoice.
Place of supply
State-wise POS determination auto-routes the GST split correctly.
Run your billing, not just make a PDF
Generating invoices is free and unlimited. Pro is for getting paid faster and filing GST without the busywork.
What freelancers say
Loved by Indian freelancers & SMBs
Switched from Zoho last month — haven't looked back. The CGST/SGST split is automatic, and the one-click GSTR-1 export saves my CA hours at the end of every month.
Priya Mehta
Freelance UX Designer · Bengaluru
Had a cross-state client situation I was calculating wrong for months. ZapInvoice just switches to IGST automatically — no more manual guessing, no more wrong invoices.
Rahul Kapoor
Independent IT Consultant · Delhi
I bill 15+ clients a month and used to chase every single one. Now ZapInvoice auto-reminds them on day 3, 7 and 14 — most pay before I even notice. Pro pays for itself.
Anita S.
Owner, Kreative Digital Studio · Pune
Tried Vyapar — too much inventory stuff I don't need. ZapInvoice is just: fill in, download, send. GSTIN auto-fill even detected my client's state and set the taxes correctly.
Sandeep V.
Freelance Photographer · Mumbai
Simple, honest pricing
Start free. Pay only when you need more.
Free
forever
- · Unlimited invoices (free account)
- · All 12 GST document types
- · All 3 invoice templates
- · PDF download + WhatsApp share
- · Public invoice link + payment URL
- · GSTR-1 preview
- · Watermark footer on PDF
Live usage
Trusted by Indian freelancers & SMBs
How it works
From zero to invoice in 60 seconds
No tutorial needed. The form guides you through.
Fill in the form
Enter business details, client info and line items. GST fields adapt automatically to your document type.
Preview in real time
Switch to Preview to see the pixel-perfect PDF — templates, colours, logo and all — before downloading.
Download, share & get paid
Download free, or share a public payment link and via WhatsApp. Pro adds email delivery with automatic reminders.
No sign-up, no credit card. Start in 30 seconds.
How we compare
The simplest GST tool for service businesses
ZapInvoice is purpose-built for freelancers and service businesses — not inventory management or accounting. No bloat, no learning curve.
| Feature | ZapInvoice | Zoho Invoice | Vyapar | Tally | Refrens |
|---|---|---|---|---|---|
| Works without sign-up | — | — | — | — | |
| Free plan available | Trial | — | |||
| GST auto-split (CGST/SGST/IGST) | |||||
| Works in browser — no install | Desktop | Desktop | |||
| 12 GST document types | Partial | Partial | |||
| UPI QR code on invoice | — | — | |||
| PDF generated in browser | — | — | — | — | |
| Recurring invoices + reminders | Partial | — | |||
| GSTR-1 export (for your CA) | Via Books | Add-on | |||
| Inventory management | — |
Comparison based on publicly available information. Features may vary by plan. ZapInvoice is focused on service businesses — it exports GSTR-1 for your CA but isn't a full accounting or inventory suite, which Vyapar and Tally do well for product businesses.
FAQ
Frequently asked questions
Everything you need to know about Zap Invoice.
Is it really free?+
Yes. Anyone can generate 3 invoices per month without signing up. Create a free account (just your email) for unlimited invoices. Pro (₹199/month) adds email sending, automatic payment reminders, recurring invoices, and GSTR-1 export.
What is the watermark on free PDFs?+
A small footer line that reads "Created with [app name] · [domain]". It's subtle and at the bottom — not across the invoice. Upgrade to Pro to remove it entirely.
Do I need a GSTIN to use this?+
No. If you're an unregistered supplier or composition dealer, just leave GST fields blank and choose "Bill of Supply" as the document type. The tool handles it correctly.
Are my invoices saved?+
Anonymous invoices are not stored anywhere — they're generated in your browser and stay private. Sign in to save invoices to your account and access them from any device.
What document types are supported?+
Tax Invoice, Bill of Supply, Proforma Invoice, Export Invoice (with/without GST), Credit Note, Debit Note, Delivery Challan, Self-Invoice, Receipt Voucher, Payment Voucher, and Refund Voucher — 12 types in total.
What's included in Pro?+
No watermarks, all 3 templates with custom branding, send invoices by email with automatic payment reminders, recurring invoices, one-click GSTR-1 export (JSON + CSV), unlimited clients/products/history, and a lite analytics dashboard. ₹199/month or ₹1,499/year.