Number Formatter
Format numbers with thousands separators and a chosen number of decimal places, in different locale styles. Copy the result instantly.
Separators are never auto-guessed. Choose the input locale that matches the text; invalid grouping is rejected in full.
Locale format examples (same number)
Large magnitudes? Scientific notation · FX amounts: Currency converter.
How to use
Enter a complete number, explicitly choose how its separators should be parsed, then pick decimal places and an output style. Large integers and scientific notation stay in an exact decimal string pipeline.
FAQ
What does it do?
It strictly parses a number using the input locale you choose, then formats it with a selected regional grouping style and decimal precision.
Which styles are supported?
US (1,234.56), European (1.234,56), French (space) and Indian (1,23,456.78) grouping.
Will it preserve large integers?
Yes. Formatting uses a decimal string pipeline rather than JavaScript Number, so integers above 2^53 such as 9007199254740993 are not rounded.
Does scientific notation work?
Yes. Values such as 1e6 and 1.25e-3 are expanded and rounded exactly. Inputs with mixed or ambiguous separators are rejected instead of partially parsed.
Is it private?
Yes — formatting happens locally in your browser.
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