Free tool
GSTR-1 / GSTR-3B JSON Builder
Build compliant GST return JSON files for the GSTN portal. Add invoices, ITC claims, and supplementary entries. Validate data and export in GSTN-ready format.
3 issue(s) to fix
Return Header
GSTR-1
B2B Invoices4A - Registered persons taxable supplies
B2B Invoices
No entries yet. Click "Add Row" to start.
GSTR-3B
Summary
GSTR-1
GSTR-3B
Outward Supplies
0.00+0.00
ITC Claims
0.00-0.00
Total Entries0
Total Taxable Value0.00
Total Tax0.00
Grand Total₹0.00
About This Tool
This builder helps you prepare JSON files for official GSTN portal filing. Enter your return data section-wise and export compliant JSON/CSV.
GSTR-1 captures all outward supplies. File by the 11th of the following month.
GSTR-3B is a monthly summary return. File by the 20th of the following month.
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