What is postcodes.io?

Postcodes.io is a free, open-source UK postcode API. It uses data from Ordnance Survey, National Statistics, and other government sources under the Open Government Licence. No API key is required for basic lookups.

Does it work for partial postcodes?

You can enter a full postcode for precise results. The autocomplete feature will suggest valid postcodes as you type based on a partial outward code.

What are "nearby postcodes"?

The tool shows the nearest postcodes to the one you looked up, using the postcodes.io nearest endpoint. This can be useful for finding neighbouring areas or expanding a search radius.

UK Postcode Finder — Lookup Area, Lat/Lng, County

How to Use uk-postcode-finder

Paste or enter your input into the text field.
Configure any options (format, delimiter, encoding, or mode) using the controls above the output.
The result updates instantly — no submit button required for most operations.
Click Copy or Download to take the output to your next step.

Look up any UK postcode — area, ward, county, lat/lng, country. Completely free and browser-only: your data never leaves your device, no uploads involved.

How uk-postcode-finder Works

uk-postcode-finder is a browser-side location utility built for speed and simplicity. Paste your input and the result appears within milliseconds. The tool handles edge cases — empty inputs, special characters, large datasets — without crashing or producing silent incorrect output. If you need a related operation, check the Related Tools section below.

Accepts large inputs — no size limits imposed by this tool
Handles edge cases: empty fields, special characters, and Unicode
Copy-to-clipboard and file download for every output
Works on Chrome, Firefox, Safari, and Edge without any extensions

Frequently Asked Questions

What does uk-postcode-finder do?

uk-postcode-finder look up any uk postcode — area, ward, county, lat/lng, country. Results appear immediately — no page reloads, no waiting for a server response.

What input does uk-postcode-finder accept?

Paste text directly into the input field, or type your data. Most operations handle Unicode, special characters, and multi-line inputs without issue.

How large an input can I process?

There is no hard limit imposed by this tool. Very large inputs (multi-MB text) process within your browser's available memory. For files larger than 50 MB, a command-line tool may be faster.

Can I download the output?

Yes — every output panel includes a Copy to Clipboard button and a Download as file option. Outputs are saved as plain text or the appropriate file format for the operation.

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