Random London Postcode Generator

Enter a count from 1 to 15 and press the button. The Random London Postcode Generator returns that many made-up postcodes that start with one of London's real postcode area letters (E, EC, N, NW, SE, SW, W or WC), each on a card labeled "London, United Kingdom" with a copy icon. They are placeholders for forms, mockups and sample data, not real deliverable postcodes.

What you can set

Only the count. There is no borough or area picker and no outer-London option; every result comes from a fixed list of 500 codes spread across the eight central London area letters. Press Generate Post Code again for a new set. With 500 entries and up to 15 per press, repeats are uncommon but possible.

What each result looks like

A card with the code in large text, a "London, United Kingdom" line underneath, and a copy button that copies just the code (not the city line). Results look like SW1A J7G or E9 J8P: a real London area letter, a district number, a space, and three more characters.

Read the small print before wiring these into a validator. The outward half (before the space) uses London's real letters, but the inward half (after the space) is random letters and digits rather than the strict digit-letter-letter pattern of a real UK postcode, and some district numbers (WC3 to WC9, EC5 to EC9) do not exist. The codes are fine for filling a text box or a mockup; they will fail a proper UK postcode regex and will never match an address lookup. If you need format-valid UK codes, use the Random UK Postcode Generator.

How London postcodes actually work

A UK postcode has two halves. The outward code (area letters plus a district number, sometimes with a letter) routes mail to a sorting office; the inward code (one digit and two letters) narrows it to a street or part of a street. Buckingham Palace is SW1A 1AA; 10 Downing Street is SW1A 2AA.

• The eight London area letters come from the compass points of the Victorian London postal district: E (east), EC (east central), N (north), NW (north west), SE (south east), SW (south west), W (west) and WC (west central).
• District numbers run E1 to E20, EC1 to EC4, N1 to N22, NW1 to NW11, SE1 to SE28, SW1 to SW20, W1 to W14 and WC1 to WC2. Outside the number 1 districts, numbering is alphabetical by the old sub-district name, not geographic, which is why N2 (East Finchley) is nowhere near N1.
• Central districts are subdivided by a letter because they are so dense: EC1A to EC1Y, WC1A to WC1X, W1A to W1W, SW1A to SW1Y, E1W, N1C, NW1W, SE1P.
• Inward codes never use the letters C, I, K, M, O or V, to avoid confusion with digits and each other.
• Greater London goes further. Outer boroughs use other areas entirely: BR (Bromley), CR (Croydon), DA (Dartford), EN (Enfield), HA (Harrow), IG (Ilford), KT (Kingston), RM (Romford), SM (Sutton), TW (Twickenham), UB (Uxbridge) and WD (Watford). This generator does not produce any of those.

Ways people use it

• Placeholder text in UI mockups. Delivery address forms, order confirmations and map cards for a London-based product.
• Sample rows in a spreadsheet. A demo dataset of London customers needs something in the postcode column that reads as London at a glance.
• Teaching the shape of a postcode. The area-letter half is accurate, so it works for explaining what E, SE and WC mean before showing real examples.
• Fiction and games. A flat in "N7" or a shop in "EC1" in a story or a tabletop campaign set in London, without pointing at a real doorstep.

For codes from elsewhere, the site has a Random Postal Code Canada tool, a Random US ZIP Code Generator, a general Random Zip Code Generator and a Random Zip Code in UK page for people who search with the American term. See all address and postal code generators for the full list.