Postcode Enricher (Client-only)

Paste UK postcodes, enrich them using the public postcodes.io API, preview the results in the browser, and download a CSV. Runs entirely client-side.

Features

• Light, minimal UI
• Paste postcodes (one per line or comma-separated)
• De-duplicates and normalizes formatting
• Fetches admin data via https://api.postcodes.io/postcodes
• In-page preview table (first 500 rows)
• Download CSV (Blob URL)

Usage

1. Open postcode_retrieval.html in your browser.
2. Paste postcodes.
3. Click “Enrich data”.
4. Preview the table and click “Download CSV”.

Development

• No build or server required; it is a single HTML file.
• Modify the fields in the FIELDS array to include/exclude columns.

License MIT — see LICENSE.