Add Line Numbers

Add numbers to each line

Processes in your browserFree, with no account

🔒 100% Private⚡ Instant Results🆓 Free Forever

Add Line Numbers workspaceProcesses input in your browser

INPUT

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0 chars0 words

RESULT

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💡 Tip:: Press Ctrl+Enter to copy result. Drag & drop files to load them.

Made for the task in front of you

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What is the Add Line Numbers?

The Line Numbering tool adds sequential numbers to the beginning of each line in your text. Perfect for referencing specific lines in code reviews, creating numbered lists from plain text, preparing documents for legal or academic reference, and adding line markers to log files.

How to Use the Add Line Numbers

Paste or type your text

Enter the input this tool accepts. You can paste or type text, choose a sample, or use a file picker only where the tool provides one.

Instant automatic processing

Choose the relevant options and run Add Line Numbers. Some tools update as you type; others use a clear action button and show the result when it is ready.

Copy or download your results

Use the copy, download, or export option available in the result area. Your completed result is ready to use in the next app or document.

Why Choose Our Add Line Numbers?

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Lightning Fast Real-Time Results

No loading screens, no server round-trips. Get instant results as you type. Process thousands of lines in milliseconds with client-side processing.

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Privacy & processing

Processing location depends on the tool. Tools that send input to an external service identify that before use; see our Privacy Policy for analytics and data-use details.

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Completely Free Forever — No Limits

No signups, no subscriptions, no paywalls, no daily usage limits. Every single one of our tools is free to use — today, tomorrow, and always.

Frequently Asked Questions — Add Line Numbers

Can I customize the line number format?

Our tool adds right-aligned line numbers followed by a pipe separator (|) for clean formatting. Numbers are automatically padded to align properly regardless of the total line count.

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