Supprimer les doublons
Collez une liste et nous retirons les doublons - sensible à la casse ou non, ordre préservé ou trié.
Collez la liste, choisissez le mode de comparaison, on renvoie une copie dédupliquée. Pratique pour nettoyer une exportation d'emails avant un publipostage, dédupliquer une colonne collée d'un tableur, ou réduire une liste de slugs / URL.
6 lignes en entrée, 4 uniques (2 retirées)
Comment l'utiliser
Paste your text
One entry per line. Tabs and commas inside a line stay intact.
Pick comparison options
Case sensitivity, whitespace handling, and preserve-vs-sort.
Copy the cleaned list
The output appears in the right pane. Hit Copy to grab it all at once.
Qu'est-ce que c'est ?
A duplicate-line remover takes a block of text and returns a version where every line appears at most once. The compare-and-keep step is the only logic; the variations are in how 'same' is defined - case, whitespace, and order policy all change the output.
Quand l'utiliser
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. Building a vocabulary list from a body of text after one line per word. Any time a copy-paste loop or a script dump left you with redundant rows.
Erreurs courantes
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 - the tool 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.