Remove duplicate lines
Keep the first occurrence of each line and remove repeats.
Text is processed only on this device. Standard limit: 5 MiB; JSON and Base64: 2 MiB.
0 characters · 0 words · 0 lines · 0 sentences
How to use
Paste the text you want to remove duplicate lines, choose any available options, then select Transform. The result remains in this browser tab.
Example
Matching is case-sensitive by default, so A and a remain different. Input: “A a A ”. Output: “A a ”.
Uses
Use remove duplicate lines when the output needs one specific, repeatable text transformation rather than a manual edit.
Limitations
This tool follows the documented engine rules. Matching is case-sensitive by default, so A and a remain different. Review the result when language context, terminology, or formatting conventions matter.
Local privacy
Your input and result are processed locally on this device. Convertca does not put tool text in URLs, analytics, or saved histories.
Task-specific guidance
Use it to deduplicate tags, lists, and copied records while retaining their original order.
FAQ
Does it send my text anywhere? No. Ordinary transformations run locally; use Copy or Download only when you choose to take the result elsewhere.
Verified examples
- Input
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A a A
- Output
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A a