Which Arabic dialect does this use?

It uses Modern Standard Arabic (الفصحى) cardinal numbers in the common masculine form, which is what is used in writing and formal documents across the Arab world.

Does it handle the special forms like مئتان and ألفان?

Yes — it uses the dual forms مئتان (200) and ألفان (2000), the plural آلاف/ملايين/مليارات for 3-10, and the connector و between groups.

Is my number sent anywhere?

No — the conversion runs entirely in your browser with no network requests.

Number to Words in Arabic

Convert any number into Modern Standard Arabic words, in your browser.

Spell numbers in Arabic

Type any whole number and this tool spells it out in Modern Standard Arabic (الفصحى) — for example 1234 becomes ألف ومئتان وأربعة وثلاثون.

It handles thousands (ألف), millions (مليون) and billions (مليار) with the correct dual and plural forms, and uses the connector و between groups the way Arabic is normally written. Everything happens in your browser — nothing is uploaded.