GPS Visualizer's Address Locator

Convert multiple addresses to GPS coordinates

NOTE: You'll need to get your own free API key to process a large number of addresses using this page. (Get a key: Bing, MapQuest, Google)


Type of data:    Source:   
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Google Map of your locations:

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output format:
[more map options]

To use this free utility, simply enter addresses in the box to the left, one per line, and click "Start geocoding" to find their latitude and longitude. If your data is in a tabular format with a descriptive header at the top of each column, choose "tabular" for type of data (and make sure the headers make sense!). If you have a raw jumble of address data, that's okay too; choose "raw list mode," but be aware that everything should at least look like an address, and any non-address data such as names, descriptions, or other fields might confuse things.

You can choose from three different sources of coordinates: Bing Maps, MapQuest Open, or Google. Each has their pros and cons, but none of them is guaranteed to be 100% correct -- use them at your own risk!

Also note that if you try to geocode thousands of addresses, you will probably end up with blank results after a while, because the provider will decide that you're trying to process too many addresses in a short time. If that happens, it's a sign that you should be looking into commercial geocoding services. (Or at least break your data into smaller batches.)

How this page works

Many mapping sites provide a geocoding "API" -- a way for other programs to quickly and easily access their services. But they only allow a certain number of queries per day, based on your "key." This form uses JavaScript-On-Demand (JSON) code that causes your Web browser to be the one making the request (rather than's server).

Lookup limits

The sites providing the data only allow each user to perform a few thousand lookups per day. For most individuals, that's more than enough, but if all of GPS Visualizer's users were allowed to geocode as many addresses as they want, the quota would be reached quickly. That's why there's a slot where you can enter YOUR key. When you use your key on this page, you get the benefits of nearly unlimited lookups without having to do any programming.

Verifying strange results

Sometimes the geocoder returns coordinates that don't seem right. For example, if you enter nothing but "CO", you might get Colombia rather than Colorado; adding ", US" to the end should take care of that. Another common source of errors (aside from missing, misspelled, or poorly-aligned header rows) is non-street addresses that look like addresses, like P.O. Boxes or named buildings. For example, "200 Jackson Building, 333 2nd Street" might be interpreted as "200 Jackson Street." There's really no way to get around this, other than ensuring that your "address" column contains actual street addresses.

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