UK Postcode Validator
Validate UK postcode format.
Validate UK postcodes instantly. Free UK postcode checker with format verification.
Calculator Inputs
About UK Postcode
Validate UK postcode format.
Covers all standard UK postcode formats including London SW/EC/WC.
Where it is used
UK address forms, shipping, delivery.
How to use the UK Postcode
- UK Postcode — enter the value (e.g. SW1A 1AA).
- Calculate — press the Calculate button to see the result instantly above.
Formula
AA9A 9AA / A99 9AA / A9A 9AA patterns.
Examples
Buckingham Palace
postcode:SW1A 1AA
Result: VALID ✓
Frequently Asked Questions
- Does it check if postcode exists?
- No — format only. For real lookups use Royal Mail PAF.