Duplicate & Text Cleaner
Remove duplicate lines, repeated words, blank lines, extra spaces and invisible characters locally. Preview every cleanup before copying.
Processed locally in your browserClean a pasted list in private. Your original stays untouched.
Matching rules & more removers
Words are whitespace-separated tokens; punctuation stays part of a token unless removed. Removing all repeated words can change sentence meaning. Invisible-character removal can affect scripts and emoji. Review before copying; this is not an HTML sanitizer or a CSV parser.
What stays safe, and what changes?
Cleanup is local in a cancellable worker. Nothing is uploaded or permanently saved. Line endings normalize to LF. Matching keeps original order; first/last refers to duplicate lines. Matching settings do not rewrite kept lines. Transformations run before line deduplication; word removal follows it, then joining/whitespace removal. A later step can create newly identical lines; paste the output back into Original for another pass if needed. This is plain-text cleanup, not executable-code or HTML sanitization. Pasted spreadsheet columns work as lines; quoted CSV cells with embedded newlines need a CSV-aware tool.
How to use Duplicate & Text Cleaner
- Paste a list or open a UTF-8 text file up to 1 MB.
- Choose a preset or specific cleanup options; inspect the live output and removal counts.
- Copy the result or download TXT. Your input remains available unchanged.
Useful things to know
Plain text only; not CSV parsing, HTML sanitization or a grammar corrector. Word matching uses whitespace-separated tokens, including punctuation. Case matching is Unicode lowercase rather than locale-specific linguistic equivalence. Line endings normalize to LF. Destructive options such as all-whitespace removal, punctuation, emoji and invisible-character removal are opt-in and may change meaning. Order is preserved; first/last retention applies to duplicate lines. Processing is bounded to 1 MB, 50,000 lines and a ten-second worker deadline.
Is Duplicate & Text Cleaner free, and how is my privacy handled?
Yes. Duplicate & Text Cleaner is free to use without registration. Tool inputs are processed in your browser rather than uploaded to our servers. Optional usage analytics follows your cookie preferences; it does not receive your files or tool inputs. Keep your browser updated and review results before sharing.