TEXT TOOL · PRIVATE
Add Line Numbers Online
Prefix every line with configurable line numbers.
Add consistent numeric prefixes to code snippets, transcripts, lists or review copies. Paste the input, make the change, then read the result before you copy it elsewhere.
Choose a starting number that matches your source.
Ready — input is processed locally.
This utility runs on the current device for the supported workflow. Kaazo does not need the pasted input to calculate the result.
Add Line Numbers: the job it actually does
Add consistent numeric prefixes to code snippets, transcripts, lists or review copies.
Line numbers become part of the copied text
Adding prefixes is useful for review, reference or teaching, but those numbers will travel with the text when you copy the result.
With Add Line Numbers, the main limit is this — text tools work on characters and separators; they don't understand the intent behind every sentence or dataset. Choose a starting number that matches your source.
The point where Add Line Numbers stops helping
Keep an unnumbered source if the text will later be parsed, compiled or imported.
FAQ
What does Add Line Numbers actually do?
Add consistent numeric prefixes to code snippets, transcripts, lists or review copies.
What should I check before I use the output?
Case, spacing, line order and replacement rules may look cosmetic until the text contains IDs, code, URLs or data where exact characters matter. With Add Line Numbers, the main limit is this — text tools work on characters and separators; they don't understand the intent behind every sentence or dataset. Choose a starting number that matches your source.
Can I undo the text operation after I copy the result?
Keep the original before using Add Line Numbers. Text operations can change exact characters, spacing or order that another system may depend on.
Related tools
Keep the original text beside the Add Line Numbers result if another transformation still needs to happen. The text-cleaning guide has broader context if you need it.