Remove Duplicate Words
Free tool to remove duplicate words from text. Paste your words and get a list with each word kept once - ignore case, sort A-Z, all in your browser.
Paste text to remove duplicate words - the tool splits on spaces, keeps each word once, and rejoins them. Great for cleaning tag lists, keyword sets and word clouds. Toggle case-insensitive or sort the result A-Z.
6 words in → 4 unique out (2 removed)
How to use it
Paste your text
One entry per line. A sample is preloaded so you can see the result straight away.
Pick mode and options
Remove vs find duplicates, line vs word granularity, case sensitivity, whitespace, empty lines, and preserve vs sort.
Copy the result
The output appears in the right pane. Hit Copy to grab it all at once.
What is it?
A duplicate remover takes a block of text and returns a version where every entry appears at most once - or, in find mode, only the entries that repeat. The compare-and-keep step is the core logic; the variations are in how 'same' is defined (case, whitespace), what counts as an entry (a whole line or a single word), and the order policy (preserve vs sort).
When to use it
Cleaning up an email export before a mail-merge. Deduping a column pasted from a spreadsheet. Reducing a list of tags, slugs or URLs to its unique set. Finding which rows are repeated in a log. Removing duplicate words from a keyword list. Stripping blank lines from a messy paste. Any time a copy-paste loop or a script dump left you with redundant rows.
Common mistakes
Forgetting that case matters by default - 'gmail.com' and 'Gmail.com' are different lines until you toggle case-insensitive. Mixing tab-separated and comma-separated rows in the same input - line mode treats one line as one entry regardless of internal punctuation. And losing the original order when alphabetical sort is on; switch back to 'preserve order' if the input had meaningful sequence.
FAQ
- Is the comparison case-sensitive by default?
- Yes. Toggle case-insensitive when you want Apple, apple and APPLE treated as one entry.
- What about leading or trailing whitespace?
- Off by default - ' apple' and 'apple ' count as different lines. Enable 'trim whitespace' to ignore it.
- Does it preserve the original order?
- Yes by default. The first occurrence of each unique line stays in place. Switch to 'sort alphabetically' if you want a clean A-Z list out.
- Can I find the duplicates instead of removing them?
- Yes. Switch the mode to 'Keep only duplicates' and the output lists each entry that appears more than once (one per group), so you can see exactly what was repeated.
- Can I remove duplicate words instead of lines?
- Yes. Switch granularity to 'Words' and the tool splits your text on spaces, removes repeated words, and rejoins them - handy for tags, keywords or comma-free lists. (Trim and remove-empty don't apply in word mode.)
- Can it remove blank or empty lines too?
- Yes - tick 'Remove empty lines' and any blank line is dropped from the output. Combine it with trim to also clear lines that only contain spaces.
Remove Duplicate Lines
Strip duplicate lines or words from any list - case-sensitive or not, order preserved or sorted.
Try it out →