io.github.cc1a2b/arabicfmt-mcp

Official

by cc1a2b · TypeScript

Arabic formatting: 22 Arab currencies (Saudi riyal U+20C1), Hijri dates, تفقيط, RTL/bidi fixes.

The io.github.cc1a2b/arabicfmt-mcp MCP server provides Arabic-first formatting capabilities for JavaScript and TypeScript. Its scope includes currency formatting for 22 Arab League countries (including Saudi riyal U+20C1), Hijri (Islamic calendar) dates, تفقيط, and RTL/bidi-related fixes, with support for number-to-words and multiple plural forms.

🛠️ Key Features

Formats 22 Arab League countries’ currency symbols
Handles Hijri/Islamic calendar dates
Supports تفقيط
Provides RTL/bidi corrections
Includes number-to-words output
Mentions 6 plural forms
Includes full TypeScript types and zero dependencies

🚀 Use Cases

Localizing Arabic language (i18n/l10n) output
Displaying Arabic currencies, including Saudi riyal (U+20C1)
Rendering Hijri dates in user interfaces
Improving Arabic text layout with RTL/bidi fixes

⚡ Developer Benefits

Zero dependencies
Full TypeScript types
Targets JavaScript & TypeScript formatting workflows

⚠️ Limitations

Coverage is described for 22 Arab League countries; other locales are not specified.

Topics

arabicbidicldrcurrencyhijrii18nintlislamic-calendarjavascriptl10nnumber-to-wordsrtlsaudi-riyaltafqittypescriptumm-al-qurazero-dependencieseastern-arabic-numerals

README.md39 KBView on GitHub

arabicfmt

Arabic-first formatting for JavaScript & TypeScript

Currency symbols · Hijri/Islamic calendar · number-to-words · تفقيط · 6 plural forms · RTL/bidi —
correct for all 22 Arab League countries, with zero dependencies and full TypeScript types.

أرقامٌ وعملاتٌ وتواريخُ هجريةٌ ولغةٌ عربيةٌ سليمة — في سطرٍ واحد.

downloads

npm · Live demo · GitHub

arabicfmt is the only JavaScript library that handles the entire Arabic formatting stack in one zero-dependency package — currency symbols, number precision, Hijri/Islamic calendar dates, RTL bidirectional text, Arabic number-to-words and تفقيط — with full TypeScript types. Works in Node, the browser, Deno, Bun and React Native.

New in 0.1.5: every currency sign from the Unicode 17.0/18.0 transition — SAR U+20C1, MVR U+20C2, AED U+20C3, OMR U+20C4 — plus the tooling to actually render them: typed parts, a generated @font-face, price ranges and a date-aware transition registry.

npm install arabicfmt

What other libraries get wrong

Problem	Other libraries	arabicfmt
Saudi riyal U+20C1	Emits ﷼ (U+FDFC) — the Iranian rial	Correct U+20C1 with a safe text fallback
The Unicode 18.0 signs (MVR/AED/OMR)	Unencoded, or still the old abbreviation	All four signs, plus `transitionStatus()` and a generated `@font-face`
Styling a new sign	Regex the symbol back out of a formatted string	`formatCurrencyToParts()` — the sign is its own typed part
Iraqi dinar (IQD) decimals	0 (CLDR practical)	3 decimals — ISO 4217 legal standard
Hijri date output	Varies between Node, Chrome, Safari, Hermes	Frozen Umm al-Qura tables — identical on every engine
Arabic plurals	1–2 forms; Arabic legally needs 6	Full CLDR 6-form system (zero/one/two/few/many/other)
Number to Arabic words	No zero-dep solution	`arabicToWords(1234)` → "ألف ومئتان وأربعة وثلاثون"
Spell money for cheques (تفقيط)	Build it yourself, get the grammar wrong	`spellCurrency(1234.5, {currency:"SAR"})` → "ألف ومئتان وأربعة وثلاثون ريالاً وخمسون هللةً"
Ordinals (ترتيبية)	Missing or gender-blind	`arabicOrdinal(25)` → "الخامس والعشرون", gender-aware
Spoken durations	`Intl.DurationFormat` barely supported	`formatDuration(7_500_000)` → "ساعتان وخمس دقائق" with full agreement
RTL broken sentences	Phone numbers flip mid-sentence	Unicode isolates wrap LTR runs automatically
Eastern Arabic digit parsing	`parseInt("١٢٣")` → NaN	`parseNumber("١٬٢٣٤٫٥٦")` → 1234.56
Arabic URL slugs	Strip to empty or mojibake	`slugify("مدينة جدة")` → "mdynh-jdh"
IBAN / Saudi ID checks	Regex that accepts bad numbers	Real ISO 7064 mod-97 + Luhn checksums

Install

npm install arabicfmt
# or
yarn add arabicfmt
# or
pnpm add arabicfmt

Requirements: Node.js ≥ 18 · TypeScript ≥ 4.7 (optional) · zero runtime dependencies.

Browser / CDN — no build step

Every release is mirrored on the jsDelivr and unpkg CDNs automatically. Import the browser-ready ESM bundle straight from a URL — no install, no bundler:

html

<script type="module">
  import { formatCurrency, formatHijri } from "https://cdn.jsdelivr.net/npm/arabicfmt/+esm";

  console.log(formatCurrency(1234.5, { currency: "SAR", numerals: "arab" })); // ١٬٢٣٤٫٥٠ ر.س
  console.log(formatHijri(new Date(), { numerals: "arab" }));                 // ٢٧ ذو الحجة ١٤٤٧ هـ
</script>

Subpaths work too — e.g. https://cdn.jsdelivr.net/npm/arabicfmt/dist/currency/index.js for just the currency module. Pin a version for production, e.g. arabicfmt@0.1.

Quick start

import {
  formatCurrency,      // correct symbol + precision for every Arab currency
  formatCurrencyRange, // "1,000.00 – 5,000.00 ر.س"
  formatCurrencyToParts, // typed parts — font-scope just the new Unicode sign
  transitionStatus,    // "none" | "announced" | "encoded" for any date
  signFontFaceCSS,     // the scoped @font-face the new signs need
  formatCompact,       // 1,200,000 → "1.2M" / "١٫٢ مليون"
  arabicToWords,       // 1234 → "ألف ومئتان وأربعة وثلاثون"
  spellCurrency,       // تفقيط: 1234.5 SAR → "...ريالاً وخمسون هللةً"
  arabicOrdinal,       // 25 → "الخامس والعشرون"
  formatDuration,      // 7_500_000ms → "ساعتان وخمس دقائق"
  formatFileSize,      // 1536 → "1.5 كيلوبايت"
  formatRelativeTime,  // "منذ ٣ أيام"
  formatList,          // ["أحمد","علي"] → "أحمد وعلي"
  parseCurrency,       // "١٬٢٣٤٫٥٠ ر.س" → 1234.5
  arabicPlural,        // full 6-form Arabic plural selection
  sortArabic,          // Arabic-locale collation
  slugify,             // "مدينة جدة" → "mdynh-jdh" (URL slugs)
  isValidIBAN,         // ISO 7064 mod-97 IBAN checksum
  isValidSaudiId,      // Saudi national ID / Iqama check digit
  isolateForeign,      // fix broken RTL sentences
  normalizeForSearch,  // search-key normalization
  detectLocale,        // auto-detect from browser / Node environment
} from "arabicfmt";

import { formatHijri, toHijri } from "arabicfmt/umalqura"; // deterministic Hijri calendar

// Currency
formatCurrency(1.2,   { currency: "KWD" });                      // "1.200 د.ك"
formatCurrency(1234,  { locale: "ar-SA", numerals: "arab" });    // "١٬٢٣٤٫٠٠ ر.س"
formatCurrency(-500,  { currency: "SAR", accounting: true });    // "(500.00 ر.س)"
formatCurrencyRange(1000, 5000, { currency: "SAR" });            // "1,000.00 – 5,000.00 ر.س"
formatCompact(1_500_000, { locale: "ar", numerals: "arab" });    // "١٫٥ مليون"

// The Unicode currency-sign transition, as data
transitionStatus("AED");                          // "encoded" (Unicode 18.0)
transitionStatus("AED", new Date("2026-01-01"));  // "announced"
transitionStatus("KWD");                          // "none" — Kuwait has no sign
signFontFaceCSS({ src: "/fonts/signs.woff2" });   // @font-face … unicode-range: U+20C1…U+20C4

// Number to Arabic words
arabicToWords(1234);                     // "ألف ومئتان وأربعة وثلاثون"
arabicToWords(1_000_000);               // "مليون"
arabicToWords(5, { gender: "female" }); // "خمس"

// Spell money for invoices & cheques (التفقيط)
spellCurrency(1234.5, { currency: "SAR" });
// "ألف ومئتان وأربعة وثلاثون ريالاً وخمسون هللةً"
spellCurrency(100, { currency: "SAR", suffix: true }); // "مئة ريال فقط لا غير"

// Ordinals — gender-aware
arabicOrdinal(1);                        // "الأول"
arabicOrdinal(25);                       // "الخامس والعشرون"
arabicOrdinal(1, { gender: "female" });  // "الأولى"

// Duration & file size
formatDuration(7_500_000);               // "ساعتان وخمس دقائق"
formatFileSize(1536);                    // "1.5 كيلوبايت"

// Lists
formatList(["أحمد", "محمد", "علي"]);                    // "أحمد ومحمد وعلي"
formatList(["تفاح", "موز"], { type: "disjunction" });   // "تفاح أو موز"

// Hijri dates (deterministic — same output on Node, Chrome, Safari, Hermes)
formatHijri(new Date("2025-09-23"));                            // "1 ربيع الآخر 1447 هـ"
formatHijri(new Date("2025-09-23"), { numerals: "arab" });     // "١ ربيع الآخر ١٤٤٧ هـ"
toHijri(new Date("2025-09-23"));                               // { year: 1447, month: 4, day: 1 }

// Relative time
formatRelativeTime(new Date(Date.now() - 3 * 86400_000));      // "منذ 3 أيام"

// Parse formatted strings back to numbers
parseCurrency("١٬٢٣٤٫٥٠ ر.س");   // 1234.5
parseCurrency("(500.00 SAR)");    // -500

// RTL
isolateForeign("اتصل على +1 (555) 234-5678 الآن"); // phone stays intact in RTL

// Locale auto-detection
detectLocale(); // "ar-SA" in a Saudi browser, "ar-EG" in Node with LANG=ar_EG

Currency formatting

Symbol strategy: `symbolMode`

The Saudi riyal received its own Unicode symbol (U+20C1) in September 2025. Most libraries either emit the wrong ligature (U+FDFC, the Iranian rial) or fall back to SAR. arabicfmt gives you full control:

import { formatCurrency, resolveCurrencySymbol, getCurrencyInfo } from "arabicfmt/currency";

formatCurrency(1234.5, { currency: "SAR" });
// → "1,234.50 ر.س"   (auto: safe text symbol, renders everywhere today)

formatCurrency(1234.5, { currency: "SAR", symbolMode: "new" });
// → "1,234.50 ⃁"     (U+20C1 — use with a webfont; see webfont guide below)

formatCurrency(1234.5, { currency: "SAR", symbolMode: "code" });
// → "1,234.50 SAR"   (ISO code — for accounting tables)

`symbolMode`	SAR	AED	OMR	Use when
`auto` (default)	`ر.س`	`⃃` U+20C3	`⃄` U+20C4	Default. AED/OMR use the dedicated sign; SAR stays on safe text
`new`	`⃁` U+20C1	`⃃` U+20C3	`⃄` U+20C4	Force the dedicated sign (needs font support)
`text`	`ر.س`	`د.إ`	`ر.ع.`	Always the safe text symbol — renders everywhere
`code`	`SAR`	`AED`	`OMR`	ISO code

Unicode 18.0 (16 September 2026): the AED (U+20C3), OMR (U+20C4) and MVR (U+20C2) signs are now live, and auto prefers them. Need maximum compatibility today? Use symbolMode: "text". The Saudi riyal keeps its safe text default by design. See the transition section for the full table.

Correct decimal precision — all 22 Arab League countries

Generated from CLDR 48.2.0 at build time and verified on every build:

formatCurrency(1.2, { currency: "KWD" });  // "1.200 د.ك"  ← 3 decimals
formatCurrency(1.2, { currency: "BHD" });  // "1.200 د.ب"  ← 3 decimals
formatCurrency(1.2, { currency: "IQD" });  // "1.200 ع.د"  ← 3 decimals (ISO 4217, not CLDR's 0)
formatCurrency(500, { currency: "KMF" });  // "500 ف.ج.ق"  ← 0 decimals
formatCurrency(500, { currency: "SAR" });  // "500.00 ر.س" ← 2 decimals

Decimals	Currencies
3	KWD, BHD, OMR, JOD, IQD, LYD, TND
0	DJF, KMF
2	SAR, AED, QAR, and the rest

All currency options

// Resolve from locale region — no need to know the currency code
formatCurrency(99.9,  { locale: "ar-BH" });                  // "99.900 د.ب"
formatCurrency(1234,  { locale: "ar-AE", numerals: "arab", symbolMode: "text" }); // "١٬٢٣٤٫٠٠ د.إ"  (auto → U+20C3 sign)

// Accounting notation (negatives in parentheses)
formatCurrency(-1234.5, { currency: "SAR", accounting: true }); // "(1,234.50 ر.س)"

// Hide/override
formatCurrency(100, { currency: "SAR", showSymbol: false, fractionDigits: 0 }); // "100"

// Currency metadata
getCurrencyInfo("SAR");
// {
//   code: "SAR", digits: 2,
//   symbols: { auto: "ر.س", text: "ر.س", code: "SAR", new: "⃁" },
//   unicode: { codepoint: "U+20C1", unicodeVersion: "17.0", live: true, autoDefault: false },
//   displayName: "ريال سعودي"
// }

Price ranges

import { formatCurrencyRange } from "arabicfmt/currency";

formatCurrencyRange(1000, 5000, { currency: "SAR" })
// "1,000.00 – 5,000.00 ر.س"     ← one symbol, the way ranges are actually set

formatCurrencyRange(1000, 5000, { currency: "SAR", symbolEach: true })
// "1,000.00 ر.س – 5,000.00 ر.س"

formatCurrencyRange(1.2, 2, { currency: "KWD" })
// "1.200 – 2.000 د.ك"           ← both ends share the currency's precision

formatCurrencyRange(1000, 5000, { currency: "SAR", numerals: "arab" })
// "١٬٠٠٠٫٠٠ – ٥٬٠٠٠٫٠٠ ر.س"

formatCurrencyRange(50, 50, { currency: "AED" })   // "50.00 ⃃"  — collapses
formatCurrencyRange(500, 100, { currency: "SAR" }) // throws: reversed range

Pass rangeSeparator for anything other than the default spaced en dash ({ rangeSeparator: " إلى " }), and isolate: true to wrap the whole range when it sits inside a mixed-direction sentence.

Rendering the new signs

A brand-new sign needs two things a string cannot give you: a webfont scoped to its codepoint, and a way to wrap only the symbol in the element that uses that font. Both are one call each.

1. The parts API — the currency counterpart to Intl.NumberFormat.prototype.formatToParts:

import { formatCurrencyToParts } from "arabicfmt/currency";

formatCurrencyToParts(1234.5, { currency: "SAR", symbolMode: "new" });
// [ { type: "integer",  value: "1" },
//   { type: "group",    value: "," },
//   { type: "integer",  value: "234" },
//   { type: "decimal",  value: "." },
//   { type: "fraction", value: "50" },
//   { type: "literal",  value: " " },
//   { type: "currency", value: "⃁", symbolMode: "new",
//     codepoint: "U+20C1", needsFont: true } ]

needsFont is true exactly when the part holds a dedicated Unicode sign, so a component never has to pattern-match a finished string (which is how bidi bugs start):

tsx

<span dir="rtl">
  {formatCurrencyToParts(total, { currency: "SAR", symbolMode: "new" }).map(
    (part, i) =>
      part.needsFont
        ? <span key={i} className="riyal-sign">{part.value}</span>
        : <span key={i}>{part.value}</span>,
  )}
</span>

Part types mirror Intl (integer, group, decimal, fraction, minusSign, plusSign, literal) plus four arabicfmt adds: currency, parenthesis (accounting), isolate (bidi controls) and rangeSeparator.

2. The @font-face rule — generated, with the unicode-range that makes it free on pages that never print a sign:

import { signFontFaceCSS } from "arabicfmt/currency";

signFontFaceCSS({ src: "/fonts/currency-signs.woff2" });
// @font-face {
//   font-family: "Arabicfmt Signs";
//   src: url("/fonts/currency-signs.woff2") format("woff2");
//   font-display: swap;
//   unicode-range: U+20C1, U+20C2, U+20C3, U+20C4;
// }

// Saudi riyal only, into a family name you already use:
signFontFaceCSS({ src: "/fonts/riyal.woff2", family: "Riyal", currencies: ["SAR"] });
// unicode-range: U+20C1;

Because the range is scoped to those codepoints, the browser downloads the font only when one of them is actually painted — body text is untouched. Put the family first in your stack and the rest falls through:

css

:root { font-family: "Arabicfmt Signs", "Noto Naskh Arabic", sans-serif; }

signUnicodeRange() returns just the range string ("U+20C1, U+20C2, U+20C3, U+20C4") for CSS-in-JS. Both helpers reject anything that would break out of the rule, so a URL from config can't inject CSS.

Number formatting

import {
  formatNumber, formatCompact, formatPercent,
  toArabicDigits, toExtendedArabicDigits, toLatinDigits,
  parseNumber, parseCurrency,
  arabicToWords,
  formatRelativeTime,
} from "arabicfmt/number";

// Standard
formatNumber(1_234_567.89, { locale: "en" });              // "1,234,567.89"
formatNumber(1234.5,       { numerals: "arab" });           // "١٬٢٣٤٫٥"

// Compact / short notation — dashboards and data cards
formatCompact(1_500_000);                                   // "1.5M"
formatCompact(1_500_000, { locale: "ar" });                 // "1.5 مليون"
formatCompact(1_500_000, { locale: "ar", numerals: "arab" }); // "١٫٥ مليون"

// Percent
formatPercent(0.853, { locale: "en" });                    // "85.3%"

// Three numeral systems: latn (default), arab, arabext
formatNumber(1234.5, { numerals: "arab" });                // "١٬٢٣٤٫٥"  Eastern Arabic
formatNumber(1234.5, { numerals: "arabext" });             // "۱٬۲۳۴٫۵"  Persian/Urdu

// Transliteration
toArabicDigits("Order #2026");                             // "Order #٢٠٢٦"
toExtendedArabicDigits("2026");                            // "۲۰۲۶"
toLatinDigits("٢٠٢٦");                                     // "2026"  (handles Persian ۰–۹ too)

// Parsing — round-trip support
parseNumber("١٬٢٣٤٫٥٦");         // 1234.56  (Eastern Arabic digits + separators)
parseNumber("1,234.56");          // 1234.56  (Western)
parseCurrency("١٬٢٣٤٫٥٠ ر.س");  // 1234.5
parseCurrency("(500.00 SAR)");   // -500      (accounting notation)

// Relative time
formatRelativeTime(new Date(Date.now() - 3 * 86400_000));            // "منذ 3 أيام"
formatRelativeTime(new Date(Date.now() + 3600_000), new Date(), { locale: "en" }); // "in 1 hour"

Number to Arabic words (`arabicToWords`)

Convert integers to their Arabic word representation — handles gender agreement and all six scale levels.

import { arabicToWords } from "arabicfmt";

// Basic
arabicToWords(0)       // "صفر"
arabicToWords(1)       // "واحد"
arabicToWords(2)       // "اثنان"
arabicToWords(11)      // "أحد عشر"
arabicToWords(25)      // "خمسة وعشرون"
arabicToWords(100)     // "مئة"
arabicToWords(350)     // "ثلاثمئة وخمسون"

// Thousands
arabicToWords(1000)    // "ألف"
arabicToWords(2000)    // "ألفان"
arabicToWords(5000)    // "خمسة آلاف"
arabicToWords(11000)   // "أحد عشر ألفاً"
arabicToWords(100000)  // "مئة ألف"

// Millions / billions
arabicToWords(1_000_000)    // "مليون"
arabicToWords(2_000_000)    // "مليونان"
arabicToWords(5_000_000)    // "خمسة ملايين"
arabicToWords(1_000_000_000)// "مليار"

// Large composite
arabicToWords(1_234_567)
// "مليون ومئتان وأربعة وثلاثون ألفاً وخمسمئة وسبعة وستون"

// Gender agreement — feminine noun (ليرة، روبية…)
arabicToWords(3, { gender: "female" })  // "ثلاث"
arabicToWords(5, { gender: "female" })  // "خمس"

// Negative
arabicToWords(-42)  // "سالب اثنان وأربعون"

// Decimals — opt in (default truncates, stays backward compatible)
arabicToWords(3.14, { fraction: "digits" })  // "ثلاثة فاصلة واحد أربعة"
arabicToWords(3.14, { fraction: "number" })  // "ثلاثة فاصلة أربعة عشر"

// Common fractions (denominators 2–10)
import { arabicFraction } from "arabicfmt";
arabicFraction(1, 2)  // "نصف"
arabicFraction(3, 4)  // "ثلاثة أرباع"
arabicFraction(2, 3)  // "ثلثان"

Spell money in words — التفقيط

spellCurrency is the tafqit every Arabic invoice, cheque and contract needs: it turns a numeric amount into its full legal Arabic wording, splitting major and minor units and inflecting every noun for correct grammatical agreement (singular / dual / plural / accusative).

import { spellCurrency } from "arabicfmt";

spellCurrency(1234.5, { currency: "SAR" })
// "ألف ومئتان وأربعة وثلاثون ريالاً وخمسون هللةً"

// Unit agreement is automatic (العدد والمعدود)
spellCurrency(1,   { currency: "SAR" })   // "ريال واحد"      (singular)
spellCurrency(2,   { currency: "SAR" })   // "ريالان"         (dual)
spellCurrency(3,   { currency: "SAR" })   // "ثلاثة ريالات"   (plural, 3–10)
spellCurrency(11,  { currency: "SAR" })   // "أحد عشر ريالاً" (accusative, 11–99)
spellCurrency(100, { currency: "SAR" })   // "مئة ريال"       (genitive singular)

// Minor-unit precision comes from CLDR — KWD = 1000 fils, SAR = 100 halalas
spellCurrency(1.5, { currency: "KWD" })   // "دينار واحد وخمسمئة فلس"
spellCurrency(0.75, { currency: "SAR" })  // "خمس وسبعون هللةً"

// Cheque-ready ending and locale-derived currency
spellCurrency(100, { currency: "SAR", suffix: true }) // "مئة ريال فقط لا غير"
spellCurrency(-5,  { locale: "ar-AE" })               // "سالب خمسة دراهم"

Full Arabic noun paradigms are bundled for all 22 Arab League currencies (SAR, AED, KWD, BHD, QAR, OMR, JOD, EGP, IQD, LYD, TND, DZD, MAD, SDG, LBP, SYP, YER, SOS, DJF, KMF, MRU). Inspect or extend them via the exported CURRENCY_WORDS table.

Ordinal numbers — الأعداد الترتيبية

import { arabicOrdinal } from "arabicfmt";

arabicOrdinal(1)    // "الأول"
arabicOrdinal(2)    // "الثاني"
arabicOrdinal(10)   // "العاشر"
arabicOrdinal(11)   // "الحادي عشر"
arabicOrdinal(25)   // "الخامس والعشرون"

// Gender agreement
arabicOrdinal(1, { gender: "female" })   // "الأولى"
arabicOrdinal(25, { gender: "female" })  // "الخامسة والعشرون"

// Indefinite (drop the article ال)
arabicOrdinal(3, { definite: false })    // "ثالث"
arabicOrdinal(25, { definite: false })   // "خامس وعشرون"

Duration — spelled Arabic

formatDuration turns a time span into its spoken Arabic form, with correct dual/plural/accusative agreement on every unit — something Intl.DurationFormat (still barely supported) does not give you.

import { formatDuration } from "arabicfmt";

formatDuration(7_500_000)                  // "ساعتان وخمس دقائق"  (2h 5m)
formatDuration(90, { input: "s" })         // "دقيقة واحدة وثلاثون ثانيةً"
formatDuration(3_600_000, { largest: 1 })  // "ساعة واحدة"
formatDuration(2 * 86_400_000)             // "يومان"
formatDuration(500)                        // "أقل من ثانية"

// Restrict the units considered
formatDuration(125 * 60_000, { units: ["minute"], largest: 1 })
// "مئة وخمس وعشرون دقيقةً"

largest (default 2) caps how many units appear, biggest first. Want to drive the noun agreement yourself? countedNoun(n, forms) is exported for any custom counted noun.

File size — Arabic data units

import { formatFileSize } from "arabicfmt";

formatFileSize(0)                          // "0 بايت"
formatFileSize(1536)                       // "1.5 كيلوبايت"
formatFileSize(5 * 1024 * 1024)            // "5 ميجابايت"
formatFileSize(1_500_000, { base: 1000 })  // "1.5 ميجابايت"  (decimal/SI)
formatFileSize(2048, { numerals: "arab" }) // "٢ كيلوبايت"
formatFileSize(2048, { unitStyle: "latin" })// "2 KB"

Units scale through بايت · كيلوبايت · ميجابايت · جيجابايت · تيرابايت · بيتابايت, with base: 1024 (binary, default) or base: 1000 (decimal).

Arabic plural rules (6 forms)

Arabic has six plural forms — more than any other major language. Standard i18n libraries handle 1–2 forms and break for Arabic.

import { arabicPluralForm, arabicPlural } from "arabicfmt";

// Get the CLDR form name
arabicPluralForm(0)    // "zero"
arabicPluralForm(1)    // "one"
arabicPluralForm(2)    // "two"
arabicPluralForm(5)    // "few"   (3–10)
arabicPluralForm(15)   // "many"  (11–99)
arabicPluralForm(100)  // "other"

// Select the right string
const forms = {
  zero:  "لا كتب",
  one:   "كتاب واحد",
  two:   "كتابان",
  few:   "كتب",       // 3–10
  many:  "كتاباً",    // 11–99
  other: "كتاب",
};

arabicPlural(0,   forms)  // "لا كتب"
arabicPlural(1,   forms)  // "كتاب واحد"
arabicPlural(2,   forms)  // "كتابان"
arabicPlural(5,   forms)  // "كتب"
arabicPlural(25,  forms)  // "كتاباً"
arabicPlural(100, forms)  // "كتاب"

Hijri / Islamic calendar dates

Two engines with an identical API:

	`arabicfmt/date`	`arabicfmt/umalqura`
Algorithm	Tabular arithmetic	Official Umm al-Qura tables
Accuracy	±1–2 days	Exact
Bundle	Tiny (no tables)	Larger (frozen ICU tables)
Range	Any year	AH 1300–1599
Deterministic	Yes	Yes — same on Node/Chrome/Safari/Hermes

import { toHijri, fromHijri, formatHijri, umalquraToGregorian } from "arabicfmt/umalqura";

// Convert
toHijri(new Date("2025-09-23"))        // { year: 1447, month: 4, day: 1 }
umalquraToGregorian(1447, 9, 1)        // JavaScript Date — first day of Ramadan 1447

// Format — Arabic
formatHijri(new Date("2025-09-23"))
// "1 ربيع الآخر 1447 هـ"

formatHijri(new Date("2025-09-23"), { numerals: "arab" })
// "١ ربيع الآخر ١٤٤٧ هـ"

// Format — English
formatHijri(new Date("2025-09-23"), { locale: "en" })
// "1 Rabi al-Thani 1447 AH"

// Format — ISO-style numeric
formatHijri(new Date("2025-09-23"), {
  locale: "en", month: "2-digit", day: "2-digit", order: "ymd", era: false,
})
// "1447/04/01"

Month and weekday name tables

import {
  HIJRI_MONTHS_AR,     // Arabic Hijri month names
  HIJRI_MONTHS_EN,     // English Hijri month names
  GREGORIAN_MONTHS_AR, // Arabic Gregorian month names (يناير، فبراير…)
  GREGORIAN_MONTHS_EN,
  ARABIC_WEEKDAYS_AR,  // Arabic weekday names (الأحد، الاثنين…)
  ARABIC_WEEKDAYS_EN,
} from "arabicfmt/date";

HIJRI_MONTHS_AR[8]        // "رمضان"  (index 0 = Muharram)
GREGORIAN_MONTHS_AR[0]    // "يناير"  (index 0 = January)
ARABIC_WEEKDAYS_AR[5]     // "الجمعة" (index 0 = Sunday)

Bidirectional (RTL) text helpers

Stop phone numbers and English words from scrambling Arabic sentences:

import { detectDirection, isolate, isolateForeign, stripBidi } from "arabicfmt/bidi";

// Before fix: "+1 (555) 234-5678" flips the area code in RTL context
// After fix:  the phone number is wrapped in Unicode isolates — sentence intact
isolateForeign("اتصل على +1 (555) 234-5678 الآن");

detectDirection("مرحبا");   // "rtl"
detectDirection("Hello");   // "ltr"

isolate("9:41 AM");         // FSI … PDI isolate around a mixed run
stripBidi(dirtyStr);        // remove every Unicode bidi control character

Text normalization for Arabic search

Match Arabic text despite diacritics, alef variants, hamza and taa marbuta differences:

import {
  stripTashkeel,
  normalizeArabic,
  normalizeForSearch,
  sortArabic,
  compareArabic,
} from "arabicfmt/text";

stripTashkeel("مُحَمَّد")        // "محمد"
normalizeArabic("الأحمد")        // "الاحمد"  (alef variants unified)

// Robust search — these two strings produce the same key:
normalizeForSearch("مُؤسَّسة") === normalizeForSearch("موسسه")  // true

// Arabic-locale collation
sortArabic(["ياسر", "أحمد", "بسام"])   // ["أحمد", "بسام", "ياسر"]
["ج", "أ", "ب"].sort(compareArabic)    // ["أ", "ب", "ج"]

List formatting

Join values into a grammatical Arabic list. Wraps Intl.ListFormat and degrades gracefully on runtimes without it.

import { formatList } from "arabicfmt";

formatList(["أحمد", "محمد", "علي"])                      // "أحمد ومحمد وعلي"
formatList(["تفاح", "موز", "برتقال"], { type: "disjunction" }) // "تفاح أو موز أو برتقال"
formatList([1, 2, 3], { numerals: "arab" })              // "١ و٢ و٣"

Transliteration & URL slugs

Romanize Arabic script to readable Latin, or turn it into URL-safe slugs for routes, filenames and CMS permalinks. Deterministic — short vowels appear only when the text is vowelled (carries tashkeel).

import { transliterate, slugify } from "arabicfmt";

transliterate("مُحَمَّد")    // "muhammad"   (vowelled)
transliterate("محمد")        // "mhmd"       (bare → consonant-only)
transliterate("الرياض")      // "alryad"
transliterate("غرفة ٢٠١")    // "ghrfh 201"  (digits converted)

slugify("مدينة جدة")                      // "mdynh-jdh"
slugify("الرياض 2026")                    // "alryad-2026"
slugify("Hello العالم", { separator: "_" }) // "hello_alalm"
slugify("Hello World", { lowercase: false }) // "Hello-World"

Note: this is a pragmatic, reversible-ish romanization, not a strict academic transliteration (DIN 31635 / ISO 233). It is built for slugs, search keys and readable IDs.

Validation — IBAN & Saudi ID

Real checksums, not regex guesses. isValidIBAN runs the ISO 7064 mod-97 algorithm with SWIFT-registry length checks; isValidSaudiId runs the Luhn check digit and classifies citizen vs. resident.

import { isValidIBAN, formatIBAN, isValidSaudiId, saudiIdType } from "arabicfmt";

isValidIBAN("SA03 8000 0000 6080 1016 7519")  // true
isValidIBAN("SA03 8000 0000 6080 1016 7510")  // false (bad checksum)
formatIBAN("SA0380000000608010167519")        // "SA03 8000 0000 6080 1016 7519"

isValidSaudiId("1012345672")                  // true
saudiIdType("1012345672")                     // "citizen"
saudiIdType("2100000005")                     // "resident"  (Iqama)

Registry lengths are enforced for SA, AE, KW, BH, QA, JO, LB, EG, IQ, PS, TN, MR, LY (plus common partners). Unknown-country IBANs are validated by checksum and the general 15–34 length bound, never accepted on structure alone.

Framework usage

React / Next.js

tsx

import { formatCurrency, detectLocale } from "arabicfmt";
import { formatHijri } from "arabicfmt/umalqura";

export function PriceTag({ amount, currency }: { amount: number; currency: string }) {
  const locale = detectLocale();
  return (
    <span dir="rtl">
      {formatCurrency(amount, { currency, locale })}
    </span>
  );
}

export function HijriDate({ date }: { date: Date }) {
  return <time>{formatHijri(date, { numerals: "arab" })}</time>;
}

Vue 3

import { formatCurrency } from "arabicfmt";

// composable
export function useArabicCurrency(currency: string) {
  return (amount: number) =>
    formatCurrency(amount, { currency, numerals: "arab" });
}

Node.js / Express

import { formatCurrency, detectLocale } from "arabicfmt";
import { formatHijri } from "arabicfmt/umalqura";

app.get("/invoice/:id", (req, res) => {
  const locale = req.headers["accept-language"]?.split(",")[0] ?? "ar-SA";
  const total  = formatCurrency(order.total, { locale });
  const date   = formatHijri(order.date, { locale: "ar" });
  res.json({ total, date });
});

Locale auto-detection

import { detectLocale } from "arabicfmt";

// Browser: reads navigator.language
// Node.js: reads LANG / LANGUAGE / LC_ALL / LC_MESSAGES env vars
// Fallback: "ar"

const locale = detectLocale(); // "ar-SA", "ar-EG", "en-US", …
formatCurrency(1234, { locale });

Subpath imports — tree-shakeable

Pick only what you need for the smallest possible bundle:

import { formatCurrency, spellCurrency } from "arabicfmt/currency";
import { formatNumber, arabicToWords, formatDuration, formatFileSize } from "arabicfmt/number";
import { formatHijri, toHijri }  from "arabicfmt/date";       // tabular core (tiny)
import { formatHijri, toHijri }  from "arabicfmt/umalqura";   // accurate, opt-in
import { isolateForeign }        from "arabicfmt/bidi";
import { normalizeForSearch, arabicPlural, slugify } from "arabicfmt/text";
import { isValidIBAN, isValidSaudiId }      from "arabicfmt/validate";

Measured cost of each entry point (esbuild --bundle --minify, gzipped — v0.1.5):

Import	What you get	min + gzip
`arabicfmt`	everything below	13.2 kB
`arabicfmt/currency`	22 currencies, تفقيط, parts, ranges, transition registry	7.6 kB
`arabicfmt/number`	words, ordinals, fractions, parse, duration, …	3.6 kB
`arabicfmt/umalqura`	300 years of official Umm al-Qura tables	2.4 kB
`arabicfmt/text`	normalize, plurals, collation, lists, slugs	1.7 kB
`arabicfmt/date`	tabular Hijri core	1.6 kB
`arabicfmt/bidi`	direction detection + isolates	0.8 kB
`arabicfmt/validate`	IBAN + Saudi ID checksums	0.7 kB

The complete Arabic formatting stack costs less than a single small image.

Full API reference

Every public function, by module. Full signatures and options are in the sections above and in the bundled TypeScript types.

Module	Functions
`arabicfmt/currency`	`formatCurrency` · `formatCurrencyToParts` · `formatCurrencyRange` · `spellCurrency` · `getCurrencyInfo` · `resolveCurrencySymbol` · `transitionStatus` · `getCurrencyTransition` · `listCurrencyTransitions` · `signFontFaceCSS` · `signUnicodeRange`
`arabicfmt/number`	`formatNumber` · `formatPercent` · `formatCompact` · `parseNumber` · `parseCurrency` · `toArabicDigits` · `toExtendedArabicDigits` · `toLatinDigits` · `shapeDigits` · `arabicToWords` · `arabicOrdinal` · `arabicFraction` · `countedNoun` · `formatDuration` · `formatFileSize` · `formatRelativeTime`
`arabicfmt/umalqura`	`formatHijri` · `toHijri` · `fromHijri` · `gregorianToUmalqura` · `umalquraToGregorian`
`arabicfmt/date`	`formatHijri` · `toHijri` · `fromHijri` (tabular core)
`arabicfmt/text`	`stripTashkeel` · `removeTatweel` · `normalizeArabic` · `normalizeForSearch` · `arabicPlural` · `arabicPluralForm` · `sortArabic` · `compareArabic` · `createArabicCollator` · `formatList` · `transliterate` · `slugify`
`arabicfmt/bidi`	`isolateForeign` · `isolate` · `wrapLTR` · `wrapRTL` · `stripBidi` · `detectDirection` · `isRTL` · `charDirection`
`arabicfmt/validate`	`isValidIBAN` · `formatIBAN` · `normalizeIBAN` · `isValidSaudiId` · `saudiIdType`
`arabicfmt` (root)	re-exports everything above + `detectLocale`

MCP server — use arabicfmt from AI agents

AI agents (Claude Desktop, Claude Code, Cursor) can call arabicfmt directly through the arabicfmt-mcp Model Context Protocol server — 21 tools (format_currency, format_currency_range, currency_transition, spell_currency, format_hijri, arabic_to_words, isolate_foreign, validate_iban, …). Add it to your client's mcpServers config:

json

{
  "mcpServers": {
    "arabicfmt": { "command": "npx", "args": ["-y", "arabicfmt-mcp"] }
  }
}

Source and full tool list: mcp/.

Examples

Runnable scripts for every feature live in examples/:

cd examples && npm install
node currency.mjs   # or numbers / words / dates / text / bidi / validate

Engineering


Dependencies	Zero runtime dependencies
Size	~13.2 kB min+gzip for the whole library; subpath imports from 0.7 kB
Formats	Dual ESM + CJS, full `.d.ts` / `.d.cts` types
Tree-shaking	`"sideEffects": false` — pay only for what you import
Data source	CLDR 48.2.0 + ICU — verified at build time, not hand-typed
Test coverage	242 tests — currency transition, parts, ranges, precision, Hijri, plurals, words, tafqit, durations, IBAN/ID
Platforms	Node ≥ 18, all evergreen browsers, React Native / Hermes, Deno, Bun
Published with	npm provenance (GitHub Actions attestation)

Unicode currency-sign transition

Complete as of Unicode 18.0 — released 16 September 2026

Four currencies moved from an ad-hoc abbreviation to a dedicated Unicode sign in this cycle, and arabicfmt carries all four. Note what is not on this list: Kuwait has never issued a dinar sign — KWD is still د.ك / KD, and transitionStatus("KWD") returns "none".

Currency	Sign	Codepoint	Unicode	Announced	`auto` default
Saudi riyal (SAR)	`⃁`	U+20C1	17.0 (9 Sep 2025)	SAMA, 20 Feb 2025	text `ر.س` (conservative)
Maldivian rufiyaa (MVR)	`⃂`	U+20C2	18.0 (16 Sep 2026)	MMA, 3 Jul 2022	sign
UAE dirham (AED)	`⃃`	U+20C3	18.0 (16 Sep 2026)	CBUAE, 27 Mar 2025	sign
Omani rial (OMR)	`⃄`	U+20C4	18.0 (16 Sep 2026)	CBO, 19 Nov 2025	sign

The rufiyaa is not an Arab League currency, but it was encoded in the same batch and sits between the dirham and rial in the Currency Symbols block — carrying it keeps the range contiguous, so one unicode-range covers the whole transition.

Because system-font coverage for brand-new signs still varies, symbolMode: "text" always returns the safe abbreviation, and the Saudi riyal keeps the text symbol as its auto default by design.

The transition as data

Encoding is not rendering. A sign exists in the standard months or years before system fonts draw it, and every product shipping in that window has to decide what to print. That timeline is queryable:

import {
  transitionStatus,
  listCurrencyTransitions,
  getCurrencyTransition,
} from "arabicfmt/currency";

transitionStatus("SAR")                          // "encoded"
transitionStatus("SAR", new Date("2025-03-01"))  // "announced" — SAMA had it, Unicode didn't
transitionStatus("AED", new Date("2026-01-01"))  // "announced"
transitionStatus("KWD")                          // "none" — no sign exists

listCurrencyTransitions({ unicodeVersion: "18.0" }).map((t) => t.code);
// ["MVR", "AED", "OMR"]

getCurrencyTransition("OMR");
// {
//   code: "OMR", sign: "⃄", codepoint: "U+20C4", name: "OMANI RIAL SIGN",
//   unicodeVersion: "18.0", unicodeReleased: "2026-09-16",
//   announced: "2025-11-19", authority: "Central Bank of Oman (CBO)",
//   autoDefault: true, textSymbol: "ر.ع.",
// }

transitionStatus takes a moment in time, so a historical invoice can be re-rendered with the symbol that was correct on its own date.

Live demo

arabicfmt.vercel.app — the whole library, interactive and computed live in your browser. Change any input and watch the Arabic update in real time: currency studio, تفقيط, Hijri converter, plurals, RTL fixes and more.

Run it locally:

cd demo && npm install && npm run dev

Contributing

Issues and pull requests are welcome on GitHub.

License

MIT — free for commercial and personal use.

Author & more projects

Built and maintained by cc1a2b.

If arabicfmt saves you time, please star it on GitHub — it helps other Arabic developers find it. Explore my other open-source projects, or open an issue with ideas, bugs and feature requests.

_{Built for Arabic-first software}

Install

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "arabicfmt-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "arabicfmt-mcp@0.1.1"
      ]
    }
  }
}

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

Topics

arabicfmt

Arabic-first formatting for JavaScript & TypeScript

What other libraries get wrong

Install

Browser / CDN — no build step

Quick start

Currency formatting

Symbol strategy: symbolMode

Correct decimal precision — all 22 Arab League countries

All currency options

Price ranges

Rendering the new signs

Number formatting

Number to Arabic words (arabicToWords)

Spell money in words — التفقيط

Ordinal numbers — الأعداد الترتيبية

Duration — spelled Arabic

File size — Arabic data units

Arabic plural rules (6 forms)

Hijri / Islamic calendar dates

Month and weekday name tables

Bidirectional (RTL) text helpers

Text normalization for Arabic search

List formatting

Transliteration & URL slugs

Validation — IBAN & Saudi ID

Framework usage

React / Next.js

Vue 3

Node.js / Express

Locale auto-detection

Subpath imports — tree-shakeable

Full API reference

MCP server — use arabicfmt from AI agents

Examples

Engineering

Unicode currency-sign transition

The transition as data

Live demo

Contributing

License

Author & more projects

Install

Related servers

Symbol strategy: `symbolMode`

Number to Arabic words (`arabicToWords`)