Comma Separator
Free online comma separator tool. Add or remove thousands separators from any number instantly. 100% client-side.
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What is Comma Separator?
The Comma Separator tool is a free, browser-based utility that adds or removes thousands separators from numbers. Paste a plain number like 1234567.89 and instantly get 1,234,567.89, or paste a formatted number and strip the separators back out. It supports five separator styles (comma, space, dot, underscore, apostrophe), adjustable decimal precision, trailing-zero trimming, and batch formatting of entire lists. A smart parser even handles mixed formats such as European decimal commas and dot separators. Everything runs locally in your browser, so your numbers never leave your device.
Key Benefits
- Add or remove thousand separators with a single click — no formulas or spreadsheets required
- Five separator styles plus a no-separator mode for any locale or convention
- Adjustable decimal precision from 0 to 10 places with optional trailing-zero trimming
- Batch format entire columns or comma-separated lists at once
- Smart parser handles European decimal commas, dot separators, and mixed formats
Common Use Cases
- •Format prices, revenue, or population figures for reports and presentations
- •Clean up exported data by stripping separators before importing into a database or API
- •Convert between locale conventions (e.g. European 1.234,56 to English 1,234.56)
- •Prepare large numbers for CSV files, JSON payloads, or SQL queries
- •Quickly format statistics for blog posts, dashboards, or financial documents
How to Use the Comma Separator Tool
- Choose a Direction: Pick "Add Separators" to insert thousand separators into plain numbers, or "Remove Separators" to strip them back out.
- Select a Separator Style: Choose comma, space, dot, underscore, apostrophe, or none. Comma is the default for English locales.
- Set Decimal Precision: Adjust the number of decimal places (0–10) and toggle trailing-zero trimming to control how fractions are displayed.
- Paste and Copy: Paste one number per line or a comma/space-separated list. The formatted result appears instantly — click Copy to copy it.
Key Features
- Add or remove thousands separators from any number with a single click
- Five separator styles: comma, space, dot, underscore, and apostrophe — plus a no-separator mode
- Adjustable decimal precision from 0 to 10 places with optional trailing-zero trimming
- Batch formatting: paste a column or a comma-separated list and format every number at once
- Smart parsing handles mixed formats including European decimal commas and dot separators
- Live counts of numbers found, lines formatted, and unrecognized tokens
Frequently Asked Questions
How do I add commas to a number?
Paste your number (for example 1234567.89) into the input box, make sure the direction is set to "Add Separators," pick "Comma (,)" as the separator style, and the formatted result (1,234,567.89) appears instantly. Click Copy to copy it to your clipboard.
Can I remove thousand separators from a number?
Yes. Switch the direction to "Remove Separators" and paste your formatted number. The tool strips out commas, spaces, dots, underscores, and apostrophes and returns a plain number. You can also control how many decimal places the result should have.
What separator styles are supported?
You can choose comma (1,000,000), space (1 000 000), dot (1.000.000), underscore (1_000_000), apostrophe (1'000000), or none (1000000). This covers the conventions used in English, European, Swiss, and programming contexts.
Does the tool handle European decimal commas?
Yes. The smart parser detects whether a comma or dot is being used as the decimal mark. For example "1.234,56" (German style) is parsed as 1234.56 and reformatted according to your chosen separator style.