E-Invoice Generator
Prepare invoice information and generate structured e-invoice data with automated intra/inter-state GST calculations, live preview, printable PDF, and JSON export.
E-Invoice JSON Generator
Generate structured JSON from invoice information conforming to the official NIC E-Invoice Schema v1.03. Features live syntax preview, copy, and instant file download.
E-Invoice Validator
Check e-invoice JSON and identify common data errors before official submission. Tests syntax, required objects, GSTIN formats, item totals, and assessable value math.
GSTIN Validator
Check the basic format of a GSTIN. Verifies the 15-character statutory format, identifies state codes, examines PAN entity categories, and checks MOD-36 checksum digits.
GST Calculator
Calculate GST, CGST, SGST, and IGST for exclusive and inclusive transactions. Features instant rate slabs (5%, 12%, 18%, 28%), custom percentages, and reverse calculations.
Invoice Generator
Flow-Invoice's flagship free online invoice generator. Create beautiful, professional PDF invoices in seconds with custom brand colors, payment details, and multi-currency support.
GST Invoice Generator
Create formal GST tax invoices with business GSTIN numbers, client addresses, HSN/SAC codes, and tax breakdowns formatted for input tax credit (ITC) claims.
How the Flow-Invoice Suite Works Together
Follow this streamlined 4-step compliance workflow to prepare, verify, and generate your invoicing records without expensive accounting subscriptions.
Verify GSTIN
Use the GSTIN Validator to check client and supplier numbers for state code and checksum accuracy.
Calculate Tax
Determine exact assessable values and CGST/SGST/IGST splits using the GST Calculator.
Validate & Submit
Pre-screen your payload with the E-Invoice Validator before uploading to the official IRP.
The Indian E-Invoice Regulatory Framework
Electronic invoicing under the Goods and Services Tax (GST) has transformed corporate compliance across India. By standardizing the format in which B2B invoices are reported, the government ensures seamless interoperability across diverse accounting systems.
Key benefits of utilizing standardized e-invoice preparation tools:
- Automated ITC Verification: Invoices authenticated by the IRP automatically flow into the buyer's GSTR-2B, eliminating Input Tax Credit mismatch notices.
- Elimination of GSTR-1 Reconciliation: Authenticated invoice payloads populate Table 4 of the seller's GSTR-1 automatically.
- Streamlined E-Way Bill Issuance: Where transport details are captured, Part-A of the E-Way bill is populated simultaneously upon IRN generation.
- 100% Privacy with Flow-Invoice: All tools in this suite execute purely inside your web browser. Your business turnover, customer contacts, and billing totals are never uploaded to our servers.