Case converter & list cleaner

Change letter case, trim lines, remove duplicates, sort and add a literal prefix or suffix.

Tool guide

How to use Case converter & list cleaner

Change letter case, trim lines, remove duplicates, sort and add a literal prefix or suffix.

  1. Paste text and choose the settings. Work starts only when you choose the tool action; samples are fictitious. No account or file upload is required.
  2. 1 MiB per text input · 4 MiB complete output · browser-only processing. 50,000 lines · prefix/suffix 1,024 bytes each.
  3. Line endings become LF. Rules run in order: trim, case, blank removal, exact deduplication, UTF-16 sorting, prefix/suffix. Sorting is not language-aware or numeric; simple title case is not editorial title casing.
  4. Review the result before downloading. Cancel stops the local worker; editing, Clear or leaving discards the old result and download link. Text and results are not saved to your account. Already-downloaded files remain on your device.
Read the full guide