Tax ID Validator
Auto-detect and validate taxpayer, VAT, EIN and GST identifiers in your browser
For Development & Testing Purposes Only - Synthetic Mock Data
Examples
Single validation
DE136695976Valid · Germany VAT IDEach value reports the detected standard or a clear unsupported-format reason.
About this tool
Tax ID Validator compares an input against the suite's supported VAT, EIN, TIN and GST standards and returns the strongest local explanation available.
Generation and validation run entirely in the browser; nothing is stored or uploaded.
Use cases
Import QA
Check fixture files before loading them into a billing, CRM or ERP test database.
Common mistakes
Mistake:Using format validation as an official lookup
Fix:For live EU VAT status, use the official VIES service.
Frequently asked questions
Related guides
References & standards
Related tools
Tetris
Classic Tetris — stack falling pieces, clear lines and chase your best score with keyboard or touch controls. The board auto-saves in your browser.
Snake
Classic snake game — eat, grow and survive. Swipe on mobile or use the keyboard; the game pauses itself when the tab hides and your best score stays local.
Minesweeper
Classic Minesweeper — clear the field without detonating a mine. Three difficulties, flag mode for touch, guaranteed-safe first click, best times saved locally.
Memory Match
Classic memory pairs game — flip two cards at a time, match all pairs and beat your best moves and time. Three grid sizes, three themes, zero downloads.
2048
Classic 2048 tile puzzle — swipe or use arrow keys to merge equal tiles and reach 2048. Auto-save and best score stay in your browser.
VAT Number Generator
Generate VAT numbers for EU, UK, Switzerland, Norway and global tax integration testing.