ABN Validator
Validate Australian Business Numbers (ABN). Check the 11-digit ABN format and verify the check digit algorithm.
How to Validate an Australian Business Number
- 1 Enter the 11-digit ABN in the input field
- 2 Click the Validate button
- 3 View the validation result showing if the ABN is valid or invalid
- 4 Copy the formatted ABN if needed
Frequently Asked Questions
Is my code or data stored anywhere? ▼
No. All developer tools process data locally in your browser. Nothing is sent to any server or logged.
Can I use these tools offline? ▼
Yes! After the initial page load, most developer tools work without an internet connection.
Are there API limits? ▼
No limits. Since processing happens in your browser, you can use the tools as much as you need.
Is the output compatible with production use? ▼
Yes. Our tools produce standard-compliant output suitable for production environments.
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Last updated: January 15, 2026 · v2.1