Free Tools
Free tools for Indian businesses
No signup needed. Calculators and generators for GST, WhatsApp marketing, and legal drafting — built by the team behind Astra Atlas, Spark, and Lex.
GST & Billing — Astra Atlas
GST Calculator
CGST, SGST & IGST breakdown for any amount and rate.
Invoice Generator
Create a GST-compliant invoice and download as PDF.
HSN Code Finder
Search any product to find its HSN code and GST rate.
Working Capital Calculator
See how much cash is trapped in slow stock and udhaar.
Shrinkage Risk Quiz
7 questions to check your shop's theft/fraud risk.