What does minimumFractionDigits do in Intl.NumberFormat?

It sets the minimum number of decimal places shown. With a value of 2, `1250500` renders as `$1,250,500.00`. maximumFractionDigits caps the other end, so you can allow up to 4 places without forcing them.

Does Intl.NumberFormat support the Indian lakh and crore numbering system?

Yes. The hi-IN locale implements it natively — digits are grouped in pairs after the first three, which turns 1250500 into ₹12,50,500.75 automatically, no custom logic required.

What's the difference between style: 'percent' and multiplying by 100?

The percent style treats your input as a fraction — pass 0.45 to get "45%". If your value is already 45, divide it by 100 first, or the formatter will output "4500%".

How do I format a currency for a different country without changing the currency itself?

Set the locale independently from the currency code — for example, format BRL using en-US grouping conventions to get R$1,250,500.75 instead of R$ 1.250.500,75. Both are valid, just different regional conventions.

How do I format a number as currency in JavaScript?

Use `new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(1250500.75)`, which returns "$1,250,500.75". The currency option is required whenever style is set to 'currency'.

Number Formatter

Free online number formatter — add commas, format currency and decimals for 16 locales with live Intl.NumberFormat code output. No signup needed.

Updated June 2026

Quick Mode: Add Commas

→

1,250,500.75

Technical Configuration

Locale

Format Style

Currency

Min. Decimals

Max. Decimals

Use Grouping (Separators)

Formatted Result

$1,250,500.75

Global Locale Comparison

Simultaneous view of 16 geographic formats.

● Live

🇺🇸 en-US

$1,250,500.75

🇩🇪 de-DE

1.250.500,75 €

🇧🇷 pt-BR

R$ 1.250.500,75

🇫🇷 fr-FR

1 250 500,75 €

🇯🇵 ja-JP

￥1,250,500.75

🇮🇳 hi-IN

₹12,50,500.75

🇬🇧 en-GB

£1,250,500.75

🇨🇳 zh-CN

¥1,250,500.75

🇮🇹 it-IT

1.250.500,75 €

🇷🇺 ru-RU

1 250 500,75 ₽

🇪🇸 es-ES

1.250.500,75 €

🇨🇭 fr-CH

1 250 500.75 CHF

🇸🇦 ar-SA

‏١٬٢٥٠٬٥٠٠٫٧٥ ر.س.‏

🇰🇷 ko-KR

₩1,250,500.75

🇵🇹 pt-PT

1 250 500,75 €

🇻🇳 vi-VN

1.250.500,75 ₫

How to format a number online

Paste a number, preview it in any locale

1. Type the number in Quick Mode

The result updates instantly with thousand separators for your browser's locale.

2. Fine-tune it in Advanced Settings

Pick the locale, style (currency, decimal or percent), currency code and decimal places.

3. Copy the result or the code

"Copy Result" grabs the formatted string; "Copy Code" generates the matching Intl.NumberFormat snippet.

What this number formatter does

The full Intl.NumberFormat API, without writing a line of code

16 locales supported

From en-US and pt-BR to hi-IN and fr-CH, each with its own grouping rules baked in.

Ready-to-copy code

The Intl.NumberFormat snippet updates live as you change locale, style or decimal options.

3 formatting styles

Currency, decimal or percent, with configurable minimum and maximum fraction digits.

Locale independent of currency

Show a BRL value using US grouping conventions, or any other locale/currency combination.

Same number, different locales

How 1,250,500.75 looks around the world

Locale — style

Output

en-US — currency (USD)

$1,250,500.75

de-DE — currency (EUR)

1.250.500,75 €

hi-IN — currency (INR)

₹12,50,500.75 — lakh/crore grouping

fr-CH — currency (CHF)

CHF 1'250'500.75 — Swiss apostrophe

When you'll reach for this tool

The scenarios that come up most often

E-commerce price display

Format the same price for every storefront locale with one Intl.NumberFormat call instead of hand-rolled string logic.

Financial dashboards

Show portfolio balances and revenue with the correct thousand separators for each region your users are in.

Invoices and reports

Generate correctly-localized number strings for documents sent to clients in different countries.

Learning and prototyping

Try option combinations and see the exact output before locking in a formatting config in production code.

Common mistakes

Confusing style: 'percent' with multiplying by 100

Intl.NumberFormat treats the value as a fraction — pass 0.45 to get "45%", not 45. Passing 45 outputs "4500%".

Assuming every locale groups digits in threes

hi-IN groups in pairs after the first three digits — that's the lakh/crore system, and it's easy to miss if you've only tested en-US.

Writing a manual regex for thousand separators

Intl.NumberFormat already handles edge cases like the Swiss apostrophe or Indian grouping — a hand-written regex will get those wrong.

Why use this number formatter

It exposes the full power of the native Intl.NumberFormat API — not just thousand separators — and hands you the exact code snippet that reproduces the result, so there's nothing to reverse-engineer later.

It covers real regional quirks, like India's lakh/crore grouping and the Swiss apostrophe separator, that generic "add commas" formatters routinely get wrong.

Frequently asked questions

Use new Intl.NumberFormat('en-US').format(1250500) — it returns "1,250,500". Swap the locale to 'de-DE' if you want periods as thousand separators instead.

References

MDN — Intl.NumberFormat

The official reference covering every constructor option and supported locale.

Unicode CLDR — Number and Currency Formats

The underlying data browsers use for regional separators and grouping rules.

Global Locale Comparison

How to format a number online

1. Type the number in Quick Mode

2. Fine-tune it in Advanced Settings

3. Copy the result or the code

What this number formatter does

16 locales supported

Ready-to-copy code

3 formatting styles

Locale independent of currency

Same number, different locales

When you'll reach for this tool

E-commerce price display

Financial dashboards

Invoices and reports

Learning and prototyping

Common mistakes

Confusing style: 'percent' with multiplying by 100

Assuming every locale groups digits in threes

Writing a manual regex for thousand separators

Why use this number formatter

Frequently asked questions

References

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