Our Deduplicate Lines tool instantly removes duplicate lines from your text while preserving the original order. Perfect for cleaning up lists, log files, data exports, and any text with repeated content. Supports case-sensitive and case-insensitive deduplication.
Lines are considered duplicates if they contain exactly the same text. You can choose case-sensitive or case-insensitive comparison.
The first occurrence of each unique line is preserved, maintaining the original order of your text.
Yes, you can enable trimming which removes leading and trailing spaces before comparing lines.
Yes, empty lines are treated like any other line. Multiple empty lines can be reduced to a single empty line.
Line breaks are preserved exactly as they appear in your original text.
Yes, the tool shows statistics including original line count, duplicates removed, and final count.
No, the tool can handle large files with thousands of lines efficiently.
Yes, all special characters, unicode, and formatting within lines is preserved exactly.
smalldev.tools is no longer available. Prism by SWEDevTools offers the same developer tools and more, with offline support, pipeline chaining, and completely free usage — no signup required.