Add Line Numbers
Add sequential line numbers to any text or list. Customize the start number, padding and separator. Browser-based and private.
Last reviewed by the Radiatus Cloud team
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Turn a plain list into a numbered one
Adding sequential numbers to the front of every line sounds trivial until you have a hundred lines and a text box with no numbering feature. This tool prefixes each line with its number, so a raw list becomes an ordered one you can reference by position, paste into a document, or use to count entries at a glance.
Control where the numbers start and how they look
The starting number is adjustable because your list may be a continuation of something else, or a step sequence that begins at zero. Being able to start at any value means the numbers match the real position rather than always restarting at one. Consistent formatting keeps the numbers aligned so the text stays readable rather than ragged.
A quick way to count and cite
Numbered lines double as a counting tool: the last number is the line count, which is faster than any other way of tallying a pasted block. They also make text easy to talk about, since you can point to "line 14" instead of quoting it. The numbering runs in your browser and the original text is never uploaded.
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Frequently Asked Questions
Can I choose which number to start from?
Yes. The starting number is adjustable, so you can begin at 1, 0, or any value to match a continuation or a step sequence.
Does it number blank lines?
Blank lines are treated as lines, so they receive numbers too, which keeps the numbering aligned with the actual line positions.
How do I find out how many lines I have?
The final number added is the total line count, so numbering a block is also a quick way to count it.
Will the numbers stay aligned?
Yes, the formatting keeps the numbers consistent so the numbered text remains tidy and readable.
Is my text uploaded anywhere?
No. Line numbering runs entirely in your browser.
Privacy & Security
All processing happens locally in your browser — your text is never uploaded.
How to Use
Paste text, set the start number and separator, and numbered lines appear instantly.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
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TextBrowse, search, and copy emojis by category. Collect multiple emojis and copy them all at once. Recently used emojis saved locally.
Text to Speech Player
TextConvert text to natural speech using the Web Speech API. Adjustable voice, speed, pitch, and volume with playback controls.
Speech to Text Transcriber
TextTranscribe speech to text using your microphone. Supports multiple languages with continuous listening, copy, and download features.