Add Line Numbers
Adds a sequential number to each line — choose the starting number, the separator, and zero-padding. Free, instant and 100% private in your browser.
Text Tools Runs in your browser
What does Add Line Numbers do?
Adds a sequential number to each line — choose the starting number, the separator, and zero-padding. Paste your text on the left and NMSnabbit instantly shows the numbered on the right. For example, “a b” gives “1. a 2. b”. Everything runs locally in your browser — nothing is uploaded, so it stays private and works offline. You can process several values at once and copy the result with one click.
How to use the Add Line Numbers
- 1 Type or paste your text into the input box.
- 2 The numbered appears instantly in the output box as you type.
- 3 Tip: try the example “a b” to see “1. a 2. b”.
- 4 Click “Copy output” to copy the result.
What you can use it for
- Quickly adds a sequential number to each line — choose the starting number, the separator, and zero-padding without installing anything.
- Checking results while learning or teaching how text and numbered relate.
- Preparing or debugging data for programming, electronics or homework.
- Working privately when the data shouldn't be uploaded to a server.
Frequently asked questions
How do I use Add Line Numbers?
Paste your text into the input field above. Add Line Numbers runs instantly in your browser and shows the numbered on the right — no button to press and nothing uploaded.
Is Add Line Numbers free and private?
Yes. Add Line Numbers is completely free with no sign-up, and it runs entirely client-side in your browser, so your data never leaves your device.
Can I process more than one value at once?
Yes. Enter several values separated by spaces or new lines and each one is handled independently, so you can batch-process in a single pass.
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