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Add / Remove Line Numbers

Add 1-based line numbers or remove matching numeric prefixes.

Convert in your browser · No sign-up

Remove mode recognizes only a leading number followed by a period and a space. Blank lines are numbered too.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Add 1-based line numbers or remove matching numeric prefixes.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

apple
banana → 1. apple
2. banana

Details and limitations

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: