Number every line of your text locally - a line-number prefix on each line. Nothing is uploaded.
Running locally on your device ...
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Your files never left your device
No. Everything runs in your browser - your file never leaves your device. How this is verifiable
Numbering lines puts a sequential number in front of every line of your text, the way a code editor or a printed listing shows line numbers. This tool adds 1, 2, 3 and so on before each line, separated by a tab, so the numbers line up and the original text stays intact after them.
Numbered lines are handy for referring to a specific line in a discussion, preparing a numbered list, reviewing a log or a script, or quoting a passage by line. The text is processed exactly as pasted, and blank lines are numbered too.
Everything runs entirely locally in your browser (no upload, even offline) - your text never leaves your device. The numbering starts at 1 and increases by one for every line; nothing else about the text is changed.
| Input formats | Text input |
|---|---|
| Output format | TXT |
| Batch processing | No |
| Processing | Locally in your browser (JavaScript) |
| File upload | None |
Limitations: Adds a sequential number (starting at 1) and a tab before every line, including blank lines. Pure text in, pure text out; nothing else about the content is changed.
No. The numbering runs entirely locally in your browser - even offline. Your text never leaves your device.
By a tab, so the numbers align in a column and the original line follows unchanged.
Yes. Every line gets a number, including empty ones, so the count matches the real line positions.
At 1, increasing by one for each following line.