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Extract telephone numbers

Find telephone numbers in any form and write them the international way.

It runs entirely in this browser tab: the text you paste is never uploaded, and the tool makes no network request while it works. Open your browser's network panel and try it — nothing leaves the page. There is no sign-up and no limit beyond what your own browser can hold.

Settings

Normalise: Reduces each number to a plus and digits, in the international form.
Country code: Used for numbers that have none. 421 for Slovakia, 420 for Czechia.
No repeats: On or off. Starts on.
Sort: On or off. Starts off.
Output as: Choices: One per line, Comma, CSV.

How to use it

Paste your text into the box above, or open a file.
Adjust the settings beside it until the result is what you wanted.
Copy the result, or save it as a file. The result updates as you type.

Questions

Is my text uploaded anywhere?: No. This page carries the whole tool as WebAssembly and runs it on your own device. Nothing you paste is sent anywhere.
Is there a size limit?: No fixed limit. Very large text is processed in full but is not laid out in the editing box, because drawing several megabytes of text sixty times a second would make typing unusable; the tool says so when that happens.
Can I get this result again later?: The settings travel in the page's address, after the #, so a link reproduces them exactly — and the fragment of an address is never sent to a server. Your last settings are also remembered on this device.
Is there a version that is not a web page?: Yes. The same tools are built as a desktop application from the same code, with a save dialog instead of a download and no network code at all.

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Extract telephone numbers

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