UtilityKit
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Line Numberer
Add line numbers to text with custom start, padding, separator, and empty-line handling.
About Line Numberer
Line Numberer adds consistent line numbers to any multiline text directly in your browser. You can set a custom starting value, pick automatic or fixed width padding, choose a separator, and optionally skip blank lines while preserving the original text flow. It is useful for code review snippets, legal drafts, logs, transcripts, and any workflow where line-level references make collaboration faster and clearer.
Why use Line Numberer
- Create clear references for long text, logs, and code snippets.
- Control format with start value, padding width, and separator text.
- Optionally skip empty lines while keeping readable structure.
How to use Line Numberer
- Paste text into the input area.
- Set the start number and choose auto or fixed padding.
- Set your separator and toggle skip-empty-lines if needed.
- Copy the numbered output for sharing or review.
When to use Line Numberer
- Preparing code snippets for team review.
- Adding references to legal or compliance drafts.
- Annotating transcripts and long logs with stable line IDs.
Frequently Asked Questions
Does this upload my text to a server?
No. Processing is done in your browser.
Can I start from a number other than 1?
Yes, set any positive start value.
What does auto padding do?
It pads numbers to the width of the largest visible line number.
Can blank lines be excluded from numbering?
Yes, enable skip-empty-lines to leave blank lines unnumbered.
Can I customize the separator after the number?
Yes, enter any separator text such as `. `, `: `, or ` - `.