Duplicate-line remover: questions and guides
Each guide here answers one question with a practical example, then takes you to the tool to try it yourself. Guides: 10.
Questions
- How to remove duplicate lines from a listHow to remove repeats from a long list while keeping the first occurrence of each line in place, and when “Coffee” and “coffee” count as the same line.
- My customer phone list has the same number in Arabic digits and in Western digits; why aren't the duplicates removed?Matching is literal, so ٠٥٥ in Arabic-Indic digits is not 055 to the tool. Convert every number to one digit style first, then remove duplicates. Worked example.
- My mailing list has the same address written with different capital letters; which setting removes those duplicates?Turn off case-sensitive matching and Ahmed@Gmail.com and ahmed@gmail.com count as one line, with the first spelling kept. When to lowercase the whole list instead.
- I copied SKU codes from Excel and there are obvious repeats, but the tool doesn't remove them; what's the cause?Excel cells can carry a space before or after a code, so SKU-1002 with a trailing space is a different line. Ignore spaces at both ends, or clean them away.
- I collected my WhatsApp orders into a list; how can I see which product was ordered most often?Paste one product per line and the duplicate remover lists every repeated line with its count, most repeated first. A quick tally without a spreadsheet, if names match.
- I gathered Google Ads keywords from several tools and the list is full of blank lines; how do I remove the repeats and the gaps in one go?Choose 'Remove all empty lines' while removing repeats, and your keyword list comes out compact and ready to paste into Google Ads, in first-occurrence order.
- Are my customers' phone numbers and emails uploaded to a server when I paste them to remove duplicates?No. Our duplicate removal runs inside your browser: the list is never sent or stored, and copy and download happen on your device. Here is what is still up to you.
- Should I sort my list first so duplicates sit together before removing them, or is that unnecessary?No need. The tool finds a repeat wherever it is and keeps the first occurrence in place, so your order survives. Sort first only if you want a sorted result anyway.
- Why doesn't the tool treat a product name written with stretched letters as a repeat of the same name without them?The stretching character (tatweel) is a real character, so a stretched name is a different line. Turn on 'ignore diacritics and tatweel' to match them. Worked examples.
- I want to remove repeated sentences from a WhatsApp broadcast message but keep the blank lines between paragraphs; which setting do I pick?Set 'Empty lines' to 'Keep all empty lines' and repeated sentences go while every blank line between paragraphs stays. The default setting glues paragraphs together.