How to use
- Paste the VAT into the validation field.
- Review format and check-digit feedback.
- Fix the input if needed — nothing is sent to a server.
What it's for
Validate VAT values for United Kingdom workflows during development and QA. Checks run in your browser with no uploads.
About UK VAT
UK VAT numbers have a defined length and checksum. Use them to exercise checkout VAT fields without live trader IDs.
Also useful
Need a sample value? Try the VAT generator.
FAQ
- Can I look this VAT up on GOV.UK?
- No. Fictional checksum-valid numbers for local validation tests.
- Does data leave my browser?
- No. Everything runs locally on your device.
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