Remove Duplicate Lines
Keep only the first occurrence of the same line and remove duplicates.
Input
The example value has been entered. Check it immediately or change the value.
Input is processed in the browser. Refreshing returns a sample value.
Result
Check or change the value using the example value result.
Up to 50,000 characters. Input and results are processed in this page’s memory and not saved. Line breaks use LF.
Share result
Share the tool link and result text together. No URL is included in the result. Check the below content and then share it.
Calculation·conversion criteria
Keep only one line of identical text.
Input example
Apple / banana / apple → apple / banana
Entering A, B, and A as separate lines keeps A and B in the order they appear. Since they are not sorted, the original order is preserved.
How to use
- Use the entered example value or change the input text item.
- Click Verify result and check the following result.
- Result can be copied if needed.
Frequently Asked Questions
Why is the same line that looks the same not removed repeatedly?
Accurately compare the entire string including uppercase, lowercase, and spaces. A and a, A with a space after are different. If needed, clean spaces or perform Unicode normalization first.
Calculation criteria and reference materials
The calculation formula and scope of this tool are disclosed in the above description. Examples can be checked by substituting input values into the formula or following the specified string and calendar handling rules.
Verification of calculation criteria: · Calculation·verification principles · Report errors