Remove duplicate lines or sort a list A→Z, Z→A, numerically or at random
List Converter
Runs locally
Use List Converter
What it does
Clean up a list with one item per line: sort it, remove duplicates, add a prefix and suffix, or join it into one comma-separated line. Useful for lists of domains or IOCs before a report.
It runs entirely in your browser: nothing you enter is uploaded.
Example
Domain list with duplicates
b.example
a.example
b.example
c.example
a.exampleb.example
a.example
c.exampleLoad example fills the list and presses Deduplicate: b.example, a.example and c.example remain, in first-seen order. Sort A-Z, Reverse or Number Lines work on the same list.
FAQ
Do the buttons work on the previous result?
No. Every button starts again from the input box, so pressing Sort A-Z and then Deduplicate does not combine the two; paste the output back into the input to chain steps. Empty lines are always removed, and the prefix and suffix are added to every item in every mode.
How do sorting and deduplication treat case and spaces?
Sorting uses the browser's locale comparison, so upper and lower case sit together (a, B, c). Deduplicate keeps the first copy of each line and compares exactly, so Example.com and example.com, or a line with a trailing space, stay as separate lines.
Is my list uploaded?
No. All operations run in your browser, and the list is not sent anywhere.