Duplicate lines list
ClientFind repeated lines in lists.
About Duplicate lines list
List lines that appear more than once. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.
How to use this page
Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.
Nearby workflows on Toolcore
- Word & character count — Words, characters, lines, and reading time—paste any text, all client-side. for the next text or markup step in your edit loop.
- Duplicate word finder — Find consecutive duplicate words. for the next text or markup step in your edit loop.
- Trim lines — Strip leading and trailing whitespace on each line—optionally remove empty lines locally. for the next text or markup step in your edit loop.
- Code beautifier — Pretty-print HTML, CSS, JavaScript, XML, and JSON in the browser—readable formatting; pair with Compress for minify. for the next text or markup step in your edit loop.
Common use cases
- Duplicate lines list for quick local checks without uploading data.
- Copy results into tickets, docs, or classroom notes.
Common mistakes to avoid
Unexpected input shape
See the intro and how-to notes for accepted formats.
FAQ
Is processing local?
Yes—this runs entirely in your browser.
Agent prefill?
Use q or qb for the main text field when supported.
More tools
Related utilities you can open in another tab—mostly client-side.
Word & character count
ClientWords, characters, lines, and reading time—paste any text, all client-side.
Duplicate word finder
ClientFind consecutive duplicate words.
Trim lines
ClientStrip leading and trailing whitespace on each line—optionally remove empty lines locally.
Code beautifier
ClientPretty-print HTML, CSS, JavaScript, XML, and JSON in the browser—readable formatting; pair with Compress for minify.