Mask a 12-digit Aadhaar number to show only the last 4 digits, in the standard format for safely sharing masked Aadhaar.
Enter exactly 12 digits.
Validate and format an Indian mobile number with country code.
Check whether a GSTIN matches the standard 15-character format and extract its PAN and state code.
Convert a rupee amount into words (lakh, crore).
Check whether a PAN matches the correct format.
Add or remove GST from an amount, with category-based rates and a CGST/SGST/IGST split.