Number Formatter

Format a long number with thousands separators so it's readable.

100% freeNo sign-upRuns in your browserNo upload · data stays private

📖 Read the full Number Formatter guide — how it works, examples & FAQ →

How to use this tool

  1. Enter a number.
  2. Pick a separator.
  3. Copy the formatted number.

Example

1234567 → 1,234,567

Why it's private

This tool runs entirely in your browser using JavaScript. Whatever you paste is processed on your own device — it is never uploaded to a server, logged, or stored. Built by Calabi, which also strips AI metadata and C2PA signals from images and video.

Related tools