Add Line Numbers, Prefix & Suffix Online
Quickly add sequential line numbers, Roman numerals, bullets, or custom prefix and suffix to each line of text or code. Fast and runs completely in your browser.
Input Text 0 lines
Numbered Result 0 lines
Add Line Numbers & Wrap Lines Online
Adding sequential line numbers, Roman numerals, or custom delimiters to raw lists, scripts, and logs is a frequent requirement in writing, editing, and data prep. The Add Line Numbers tool formats text instantly in your browser, with customizable numbering sequences, zero padding, starting counts, step intervals, and prefix/suffix wrapping.
Numbering Styles & Formatting Options
- Sequential Numbers (1, 2, 3...): Classic numeric indexing. Customize the separator with a period (
1.), closing parenthesis (1)), hyphen (1 -), or colon (1:). - Padded Zeroes (01, 02... / 001, 002...): Automatically pads line numbers with leading zeroes to keep indentation visually aligned across multi-digit rows.
- Roman Numerals (i, ii, iii... / I, II, III...): Generates lowercase or uppercase Roman numerals, standard for legal document outlines, academic indexes, and formal agendas.
- Alphabetical Indexing (a, b, c... / A, B, C...): Labels lines with alphabet characters, perfect for multiple-choice quiz questions or ordered sub-lists.
- Markdown Bullets & Checkboxes: Prepends list bullets (
-,*) or interactive task checkboxes ([ ]) for markdown documents. - Prefix & Suffix Wrapping: Wrap every line with surrounding characters. For example, add quotes
"around each item and a comma,at the end to quickly format SQLIN ('...')lists or JSON string arrays. - Skip Blank Lines: Keeps empty lines blank without consuming a number, maintaining clean paragraph breaks.
Popular Use Cases
- Preparing Code for Print or Slides: Add neat line numbers to source code snippets so students or audience members can follow along with references.
- Formatting SQL / Programming Arrays: Wrap hundreds of raw text values with quotes and commas simultaneously.
- Creating Step-by-Step Instructions: Convert unformatted brainstorming notes into an ordered, numbered tutorial.
Related Line & Text Utilities
Pair line numbering with our other text utilities:
- Sort Text Lines — sort items alphabetically or by length before applying line numbers.
- Remove Empty Lines — eliminate accidental blank rows from your text.
- Join Lines — merge numbered lines into a single delimited string.
- Remove Duplicate Lines — strip redundant lines and keep only unique list entries.
- Character Counter — measure character and line totals in real time.