Add Line Numbers
Add sequential line numbers to each line, with a configurable starting number. Reorder, split, join and format text in a single editable workspace. Review randomized or reordered output before using it.
How to use Add Line Numbers
Paste text into the editor, set any options shown, and click Apply. The transformed result replaces the content in the same text box; use Undo to restore the previous text.
What this tool does
Add sequential line numbers to each line, with a configurable starting number. Reorder, split, join and format text in a single editable workspace. Review randomized or reordered output before using it.
Before using the result
Keep a copy of important source text. This tool is intended as a convenience: validate converted content for your particular context, file format, language or software environment.
Frequently Asked Questions
Answers to common questions about Add Line Numbers.
What does Add Line Numbers do?
Add sequential line numbers to each line, with a configurable starting number. Reorder, split, join and format text in a single editable workspace. Review randomized or reordered output before using it.
How do I use Add Line Numbers?
Paste or type the source text, adjust any available options, then click Apply. The result replaces the text in the same editor; use Undo to restore the previous version.
What should I check after using Add Line Numbers?
Check punctuation, whitespace, paragraph boundaries and ordering, because this operation may intentionally rearrange or normalize the source.
Can I use Add Line Numbers with large or complex inputs?
Limits depend on your browser, the size and structure of the input, and the formats supported by the tool. Start with a short sample, then test a larger input and review the result before relying on it.
Does Add Line Numbers upload or store my content?
The transformation is intended to run in your browser. Some tools load JavaScript libraries from third-party CDNs; avoid entering passwords or highly sensitive material unless you have reviewed the page and are comfortable with its processing behavior.