ZipCodeAPI

API

Free US Zip Code Distance, Radius & Location Geocoding API

Overview

ZipCodeAPI offers RESTful endpoints for US zip code geocoding tasks: calculate distance between two zips (miles/km), find zips within a radius of a given zip, and retrieve location details (city, state, lat/long) for any valid US zip. Responses are JSON-formatted for seamless integration. Use cases include building store locators, validating delivery areas, targeted marketing, and logistics planning. It requires an API key, with rate limits varying by plan (free tier for basic needs).

Example Integration (JavaScript)

script.js JS


fetch('https://www.zipcodeapi.com')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful Endpoints
JSON Response Format
Distance Calculation (Miles/Km)
Radius Search
Location Lookup
US Zip Code Coverage

Frequently Asked Questions

? Is ZipCodeAPI free to use?

Yes, it offers a free tier with limited monthly requests. Paid plans are available for higher usage volumes and additional features.

? Does it require an API Key?

Yes, you must register on the official website to obtain an API key before accessing any endpoints.

? What is the response format?

All API responses are in JSON format, which is lightweight and easy to parse in most programming languages.

Top Alternatives

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Tool Info

Pricing Freemium

Category Geocoding

Platform Public API

Pros

⊕ Accurate US Zip Data
⊕ Easy Integration
⊕ Flexible Distance Units
⊕ Multiple Use Cases

Cons

⊖ US-Only Coverage
⊖ Requires API Key
⊖ Rate Limits on Free Tier