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Developer & Data

Duplicate Line Remover

Remove repeated lines while retaining their first occurrence.

Calculations run in your browser. The tool does not send your inputs to a server.

01Your inputs

Local workspace

Start with the sample below, or enter your own values.

The sample is editable. Keep the input format consistent with the action you choose.

02Your result

Your result will appear here. Choose an action after checking your inputs.

A quick guide

How to use this tool

  1. Check the example and the unit beside each input.
  2. Enter your values and choose Clean.
  3. Review the result and assumptions, then copy what you need.

Reset example restores the starting values. Clear removes text and number inputs, returns choices to their first valid option, and removes the result.

Reference guide

Explanation and worked examples

Matching is exact and case-sensitive. Leading or trailing spaces make otherwise similar lines different.

Use in day-to-day IT work

Inspect a configuration fragment, log extract or structured-data sample during troubleshooting.

Checks before applying the result

  • Keep the original file and compare the output before replacing a configuration.
  • Check the target parser and encoding. Converting or formatting does not validate application-specific meaning.
New to the terminology?
UTF-8
A common encoding that represents text as bytes.
Encoding
Changing representation; this does not necessarily provide secrecy.
Validation
Checking specified rules, which may cover syntax or data structure.

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