Add sequential numeric, Roman-numeral or letter labels to each line, including optional text before and after the label. Follow the exact input and settings below to reproduce this example. Open Add Line Numbers.
Prepare the source text
Open Add Line Numbers and choose Write or paste text, or upload a supported UTF-8 text file. The upload opens the editor; it does not run the tool. This example uses the exact source shown in the comparison.
Maximum input and result: 1 MB of UTF-8 text, with a 1,048,576-character input ceiling. Expanding transformations must also fit the result limit.
Use the exact example input
First item Second item Third item
This text operation runs in your browser; its source and result are not sent for conversion. A draft may be kept in this browser tab when session storage is available. Clear removes the current draft; download important work before closing the tab.
Choose the settings
For the recorded example, use these settings: Numbering: Numbers; Letter case: UPPERCASE; Start at: 1; Number prefix: (; Number suffix: ) .
Numbers use decimal labels. Roman numerals use the corresponding numeral sequence, and Letters continue from A through Z to AA and beyond. Start at chooses the first value; it can be from 1 to 1,000,000. Letter case affects Roman and alphabetic labels. Number prefix and Number suffix are inserted around each label before the original line.
The example in this guide
Verified in the i2TEXT browser workflow on November 11, 2026.
- Input
- example.txt
- Output
- add-line-numbers.txt
- Saved result
- 45 bytes
Apply and inspect the result
Select Add Line Numbers when the input and settings are ready. In the saved example, the result begins: "(1) First item".
Blank lines are numbered too. Remove empty lines first if they should not occupy a position in the sequence.
Save the version you reviewed
Review the current result, then use Download text to save a TXT file. The actual download in this example is named add-line-numbers.txt. Copy and download use the current result, so make any final wording changes before saving. Continue to can carry the result into a compatible next tool, where you review it before running another operation.
example.txtadd-line-numbers.txt
Common questions
Which settings produced this example?
Numbering: Numbers; Letter case: UPPERCASE; Start at: 1; Number prefix: (; Number suffix: ) .
What should I check before using the result?
Blank lines are numbered too. Remove empty lines first if they should not occupy a position in the sequence.
Where is this text processed?
This text operation runs in your browser; its source and result are not sent for conversion. A draft may be kept in this browser tab when session storage is available. Clear removes the current draft; download important work before closing the tab.
Try Add Line Numbers with your own text.
Use your own source and review the result before sharing.
