Free GST Tools for Indian Businesses
Quick, accurate utilities for everyday GST work — calculate tax, generate invoices, validate GSTINs, and find HSN/SAC codes. Everything runs in your browser.
GST Calculator
Add or remove GST from any amount. See CGST + SGST or IGST split instantly for all GST rates.
Open toolGST filing features
GST Invoice Generator
Create a clean, GST-compliant invoice in your browser and print or save it as a PDF. Free, no signup.
Open toolInvoicing features
GSTIN Validator
Check any GSTIN for correct format and checksum. See the state, embedded PAN, and entity code breakdown.
Open toolGST compliance features
HSN / SAC Code Finder
Search 22,000+ HSN and SAC codes by code or description to classify your goods and services correctly.
Open toolInventory features
Need more than one-off tools?
Brihat Books handles GST invoicing, inventory, e-invoicing, and GSTR filing in one place — built for Indian small businesses.
Start invoicing free with Brihat Books