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Download the UK Postcode Mapper Firefox extension here:

UK Postcode Mapper


This is my first Firefox Extension. It searches the current page you are browsing for any UK Postcode. It then shows you a list of all postcodes on a small popup window. Then you just click on the postcode you would like to see on a map and (by default) a new tab opens with the postcode mapped in Google Maps. You can change the settings to open in a new window and also change the default map provider from Google to MultiMap or StreetMap.
I built this extension to learn how Firefox Extensions work and also to make my life easier as I always seem to be cutting and pasting postcodes into Google Maps to see where places are in London. After installing this you can see any UK postcode on a map in only 2 clicks! (That is saving a copy + open new window + type in + paste + an enter!)

Here you can change the default settings

I’d recommend adding a button to your Toolbar. This can be done by right-clicking on your toolbar and selecting ‘Customise…’. Then you can drag and drop the ‘Map postcodes’ button.

This extension can also be accessed from the Tools menu.

Please leave me any feedback, suggestions or complaints in the comments.