Remove Duplicate Lines from Text
Delete duplicate lines from your text while keeping the first occurrence of every line in its original order, with a case-sensitive option — free, fully in your browser.
- Original line count
- 0
- Lines after removal
- —
🔒 Your text never leaves the browser — not one character is sent anywhere, and nothing is stored
How to use it
- Paste your textInto the first box — the original line count appears instantly.
- Set case sensitivity if neededTurn it on if you want "Hello" and "hello" treated as two different lines.
- Click "Remove duplicate lines"You see how many lines remain afterwards and exactly how many were removed.
- Copy the resultYour original stays in the first box, so you can try different sensitivity settings without pasting again.
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Frequently Asked Questions
How do you decide that two lines are duplicates?
By strict literal matching of the whole line — they must match character for character. A stray space at the start or end of a line makes the two lines different, and we leave it that way rather than trimming them ourselves — any automatic change to your text other than the removal itself would be a decision you never asked for.
Is the first occurrence removed or the last one?
We keep the first occurrence of each line and remove every repetition after it — and the original order stays exactly as it was. So if your list reads "A, B, A, C", the result is "A, B, C" — not "B, A, C" or any other order.
What happens to empty lines?
They are treated exactly like any other line: the first empty line stays, and any empty line after it is removed as a duplicate. Some similar tools silently exempt empty lines to preserve paragraph spacing — we do not, because exempting one particular value from "remove duplicates" turns the phrase into something it does not mean. If you want to keep your paragraph spacing, make sure your empty lines are not actually duplicated in the first place.
What does "case-sensitive" mean?
When enabled, "Hello" and "hello" count as two different lines. When disabled, they are treated as one line, and its first occurrence is kept in its original form. Since Arabic has no upper and lower case to begin with, this option has no effect on Arabic lines at all — it only applies to Latin letters.
If my text ends with a newline (a final Enter), does that count as an extra line?
Yes, and it counts as an independent empty line — counted exactly the same way as our word counter counts it. If there is another empty line before it, that one is removed as a duplicate just like any two adjacent empty lines.
Is my text uploaded to a server?
No, not one character. The whole removal happens inside your browser, from the very first character you type.