What is Number Thousands Formatting?

Number thousands formatting is the process of separating digits every three places with a separator to make large numbers more readable. For example, formatting 1234567 as 1,234,567. Different countries and regions use different separators. This tool supports custom thousands separator, decimal separator, decimal places, and rounding mode, suitable for financial reports, data display, internationalization applications and other scenarios.

Core Features

Support single and batch formatting modes

Custom thousands separator (comma, dot, space, apostrophe, underscore, etc.)

Custom decimal separator (dot or comma)

Flexible decimal places control (auto preserve or specify 0-6 places)

Multiple rounding modes (round, floor, ceil, truncate)

Real-time preview of formatting effect (single mode)

Support formatting of positive numbers, negative numbers, and zero

One-click copy result or download as TXT file

100% frontend local operation, data secure and reliable

How to Use

Select format mode: single format or batch format
Enter or paste numbers to format in the input box
Configure format options: thousands separator, decimal separator, decimal places, and rounding mode
Formatting happens automatically in batch mode; view preview in real-time for single mode
Click the "View Example" button to view example data
After formatting, click the "Copy Result" button to copy the formatted result
Click the "Download TXT" button to download the result as a text file
Click the "Clear" button to clear all input and output

Common Use Cases

Internationalization: Format numbers according to different regional conventions (e.g., European format: 1.234.567,89)

Financial Reports: Format amount numbers into readable format (e.g., 1,234,567.89)

Data Display: Format large numbers in reports and charts to improve readability

Development Debugging: Quickly format test data to verify if number format is correct

Batch Processing: Format multiple numbers at once to improve work efficiency

Precise Calculation: Control number precision through rounding mode, suitable for financial calculations and other scenarios

Frequently Asked Questions

What is thousands formatting?

Thousands formatting is separating digits every three places with a separator to make large numbers more readable. For example, formatting 1234567 as 1,234,567. Different countries and regions use different separators, and this tool supports customization.

How to set European number format?

European format uses dot as thousands separator and comma as decimal separator. Setting method: select "Dot (.)" for thousands separator and "Comma (,)" for decimal separator, then 1234567.89 will be formatted as 1.234.567,89.

How to control decimal places?

Select "Auto" to preserve original decimal places, or select a specific number (0-6 places) to uniformly format to that number of places. Combined with rounding mode (round, floor, etc.), you can precisely control number precision, suitable for financial calculations and other scenarios.

What rounding modes are supported?

Four rounding modes are supported: round, floor, ceil, and truncate. Round is the most commonly used; floor and ceil are suitable when you need to ensure the result does not exceed or fall below a certain value; truncate directly removes excess decimal places.

Is the data secure?

Absolutely secure! This tool uses pure frontend technology. All formatting operations are completed locally in your browser and no data is sent to any server. The numbers you input and the formatted results are not uploaded, stored, or recorded.

How are invalid numbers handled in batch formatting?

In batch formatting, if a line input is not a valid number, that line will display as "Invalid number", but it will not affect the formatting of other valid numbers. You can check the input data, correct invalid numbers, and reformat.

Number Thousands Formatter