How do I add line numbers to text?

Paste your text and line-numbered output appears instantly. Click Copy.

Yes, completely free — no account, no limits.

No. Everything runs in your browser.

When should I add line numbers?

Use it when creating numbered instructions or steps, adding reference numbers to code for review feedback, creating numbered lists for documents, and referencing specific lines in collaborative editing.

What format are the line numbers?

Lines are prefixed with the number followed by a period and space: "1. ", "2. ", etc.

Can I add line numbers to code snippets?

Yes. Paste any code or text and get numbered output. For syntax-highlighted code, a code editor is better — but for plain-text sharing or review, this tool works perfectly.

Text Formatting

Add Line Numbers Tool — Add Numbered Prefixes to Text Lines Instantly

Prefix each line of your text with a sequential line number.

Input Text

0 words0 chars

Output Text

What Is Add Line Numbers?

Prefix each line of your text with a sequential line number.

Adding line numbers to text is essential in specific technical contexts. Code review, pair programming, and bug reporting all benefit from numbered output — "the error is on line 47" is only actionable when both parties are looking at the same numbered text. Line-numbered output is also required when submitting code to some competitive programming platforms, when presenting terminal output in documentation, and when generating numbered reference lists for legal or academic documents.

This tool prepends a sequential number to the start of each line, producing output like "1. First line" and "2. Second line" — ready to paste anywhere line references matter.

Example

Apple
Banana
Cherry

→

1. Apple
2. Banana
3. Cherry

When to Use the Add Line Numbers

→Code review and debugging — numbered code snippets make error reporting precise ("the bug is on line 23, not line 24")
→Creating numbered reference lists — legal documents, academic citations, and formal reports require sequentially numbered items
→Preparing content for online judge platforms — competitive programming submission systems often require numbered input or reference specific line numbers
→Documenting log output — numbered log lines make it faster to reference specific events when filing bug reports or writing postmortems
→Generating numbered question lists — quiz creators, survey designers, and teachers need numbered questions in their materials