Free GST Tools for Indian Businesses

Calculators, lookups and invoice utilities to make GST compliance simpler. Every tool is free and needs no login.

Calculators

Work out the 18% interest on a late GST payment.

Estimate late fees for GSTR-1, 3B, 4 and 9.

Every GST filing deadline, month by month.

Find the HSN code and GST rate for any product.

Find the SAC code and GST rate for any service.

Build a compliant invoice number series.

Design a GST invoice template and download it.

Make UPI payment and invoice QR codes.

GSTClear turns these one-off checks into an always-on workflow — invoices, deadlines and compliance scoring. Free to start.