Short answer: Remove duplicate lines from any list, convert text between UPPER, lower, Title and other cases, strip unwanted line breaks, and count word frequency — all in your browser, with no signup and nothing uploaded to anyone's server.
Text cleanup is the unglamorous work behind SEO keyword lists, email campaigns, data entry and writing: dedupe a merged list, fix the case of pasted headings, flatten line breaks copied from a PDF. These tools do each job in one click, on text of any length, because your browser does the work locally instead of a metered server.
All free text tools
Remove Duplicate Lines
Dedupe any list in one click — case, whitespace and keep-first/last options.
Text Case Converter
Convert between UPPER, lower, Title, Sentence, camelCase and more.
Remove Line Breaks
Fix copy-pasted PDFs and emails — join lines cleanly.
Word Frequency Counter
Keyword density and reading stats for writers and SEOs.
More text tools are on the way — more on the way.