What is the Number Formatter?
Add thousands separators and format numbers by locale. The Number Formatter is a free online tool that works instantly in your browser — no installation, no signup and nothing to upload. It sits alongside other Number tools on DevNibble such as Number Base Converter, Roman Numeral Converter, Number to Words.
How to use the Number Formatter
- Paste or type your data into the input panel.
- Adjust the formatting options if you need to.
- Copy or download the formatted result.
Features
- Runs 100% in your browser — your data is never uploaded or stored.
- Free forever, with no account, no ads and no tracking.
- Copy or download your result in one click.
- Fast and responsive on desktop, tablet and mobile.
Frequently asked questions
Is the Number Formatter free to use?
Yes — Number Formatter is completely free with no sign-up, no ads and no limit on how many times you can use it.
Is my data private when I use the Number Formatter?
Everything happens locally in your browser. Your input is never sent to a server, which makes Number Formatter safe to use with private or sensitive data.
How do I use the Number Formatter?
Paste your code or data into the input box and the formatted, indented result appears instantly. Use the Copy or Download button to save it.
Do I need to install anything to use the Number Formatter?
No installation and no account required — Number Formatter runs entirely in your web browser on desktop and mobile. Add thousands separators and format numbers by locale.