Tax & Invoice Generator

Calculate taxes or create legally valid PDF invoices with ID validation.

Calculation
Subtotal$100.00
GST/VAT (10%)+$10.00
TOTAL$110.00

Exclusive Tax: You have a net price ($100) and need to add tax to bill a client ($110).
Inclusive Tax: You bought something for $110 and need to know how much tax was inside it (Reverse Calculation).

Professional Invoice Generator & Tax Calculator

Freelancers and small businesses need more than just a calculator. UnitMaster combines a powerful GST/VAT calculator with a Legal Invoice Generator. Create compliant PDF invoices, validate Tax IDs check automatically, and send professional estimates to clients. All running offline.

Legal PDF Invoices

Generate professionally formatted PDF invoices that are ready to send to clients.

Tax ID Validation

Automatically validate formats for GSTIN, VAT, and other tax registration numbers.

Inclusive/Exclusive

Instantly switch between adding tax on top (Exclusive) or extracting tax from a total (Inclusive).

Why choose UnitMaster?

  • Create invoices free.
  • Ensure tax compliance.
  • Save time on math.
  • 100% Private Data.

Frequently Asked Questions

Privacy Dashboard

Processing ModeOffline Ready
Client-Side (WASM)

Calculations happen locally. No data sent to servers.

Network Requests
DESTINATION
STATUS
AnalyticsAllowed
AdSenseAllowed
File UploadsNone

Incognito Mode

Tax & Invoice Generator - GST, VAT & Legal Invoices | UnitMaster - Offline Developer Tools