Runs entirely in your browser - no upload, no sign-up.
Paste your text and this line numbering tool places a sequential number before each line instantly. Choose the starting number, increment and marker style, then copy the result. You can align numbers with leading zeros and preserve blank lines without counting them, all inside your browser.
Enter or paste the multiline text you want to number, or load the example to try the controls.
Set the starting value and increment, then pick a period, parenthesis, brackets, colon or tab style.
Keep blank lines unnumbered for paragraphs, and turn on zero-padding when aligned digits matter.
Review the live output and copy the numbered text back into your document, message or editor.
Line numbers turn a plain block into text people can reference precisely. They help reviewers point to one sentence in a transcript, one instruction in a checklist or one row in a copied data set. The live preview makes every formatting choice visible before you copy.
The tool preserves your original line breaks, including Windows and Unix endings. Enable Skip blank lines to keep paragraph spacing while continuing the sequence only across lines that contain text.
No. Numbering runs locally with JavaScript in your browser. The text you paste is not sent to a server, so drafts, transcripts, logs and internal notes remain on your device while you work.
Yes. It is free to use with no sign-up, download or fixed usage limit. Paste your text, adjust the numbering options and copy the result as often as you need.
There is no fixed line or character limit. The work happens locally and normal documents update instantly. Extremely large text is limited only by your browser memory and by what is practical to review in a text area.
Yes. Enter any safe whole number in Start at, including 0 or a negative value. You can also change Increment to count by 2, 5 or another non-zero whole number, including a negative step for descending sequences.
Yes. Keep Skip blank lines enabled. Empty and whitespace-only lines remain in the output as visual gaps, but they receive no marker and do not advance the sequence. Turn the option off when every physical line should be numbered.
It adds leading zeros so every numeric part has the same digit width. A sequence that reaches 12 starts as 01, 02 and 03. Negative values keep the minus sign before the padded digits, such as -03.
Yes. Carriage return plus line feed, Unix line feed, old-style carriage returns and Unicode line separators stay unchanged. Only the numeric marker is inserted at the start of each selected line.
Yes. The tool operates on line boundaries rather than words or grammar. It can number text written in any script, along with emoji, punctuation and mixed-language content, without changing the characters inside each line.
