{"id":65837,"date":"2026-10-14T11:58:37","date_gmt":"2026-10-14T06:28:37","guid":{"rendered":"https:\/\/www.quickonlinetips.com\/archives\/?page_id=65837"},"modified":"2026-10-14T14:30:55","modified_gmt":"2026-10-14T09:00:55","slug":"remove-duplicate-lines","status":"publish","type":"page","link":"https:\/\/www.quickonlinetips.com\/archives\/tools\/remove-duplicate-lines\/","title":{"rendered":"Remove Duplicate Lines: Delete Repeated Lines Online"},"content":{"rendered":"<p>Paste a list and this tool will <strong>remove duplicate lines<\/strong> instantly, keeping the first copy of each line in its original order. 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var(--qt-line);border-radius:8px;background:repeating-conic-gradient(#E2E8F0 0 25%,#fff 0 50%) 0 0\/16px 16px} .qt-tool .qt-lb{display:inline-flex;width:44px;height:44px;border-radius:50%;align-items:center;justify-content:center;font-weight:700;font-size:17px;background:#fff;color:#1A202C;border:2px solid var(--qt-accent);margin:3px} .qt-tool .qt-lb.qt-bonus{background:#E53E3E;color:#fff;border-color:#E53E3E} .qt-tool .qt-8{width:230px;height:230px;border-radius:50%;margin:16px auto;background:radial-gradient(circle at 35% 30%,#666,#000 62%);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 10px 24px rgba(0,0,0,.35)} .qt-tool .qt-8 span{width:116px;height:116px;border-radius:50%;background:radial-gradient(circle,#2747a8,#0b1a4a);color:#fff;display:flex;align-items:center;justify-content:center;text-align:center;font-size:13px;font-weight:700;padding:16px;box-sizing:border-box;line-height:1.25;transition:opacity .3s} .qt-tool 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.qt-cell:disabled{cursor:default} .qt-tool .qt-win{background:#C6F6D5;border-color:#38A169} .qt-tool .qt-sel{background:#BEE3F8;border-color:#3182CE} .qt-tool .qt-bad{background:#FED7D7;border-color:#E53E3E} .qt-tool select{-webkit-appearance:none;-moz-appearance:none;appearance:none;padding-right:40px;cursor:pointer;border:2px solid #90B4DA;font-weight:600;background-color:#fff;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' viewBox='0 0 14 9'%3E%3Cpath d='M1.5 1.5l5.5 5.5 5.5-5.5' fill='none' stroke='%232B6CB0' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 14px center;background-size:14px 9px} .qt-tool select:hover{border-color:var(--qt-accent);background-color:#F4F8FD} .qt-tool select::-ms-expand{display:none} .qt-next{margin:0 0 1.75em} .qt-next .qt-next-h{font-size:14px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#4A5568;margin:0 0 8px} .qt-next-g{display:grid;grid-template-columns:repeat(3,1fr);gap:8px} .qt-next-g a{display:flex;align-items:center;min-height:46px;padding:9px 12px;border:1px solid #AEC3DB;border-radius:8px;background:#F4F8FD;color:#215387;font-weight:600;font-size:15px;line-height:1.3;text-decoration:none} .qt-next-g a:hover,.qt-next-g a:focus{background:#E3EEFF;border-color:#2B6CB0;text-decoration:none} @media (max-width:600px){.qt-next-g{grid-template-columns:repeat(2,1fr)}}<\/style>\n<div class=\"qt-tool\" id=\"qt-rd\">\n<div class=\"qt-two\">\n<div class=\"qt-field\"><label for=\"qt-rd-in\">Your list (one item per line)<\/label><textarea id=\"qt-rd-in\" rows=\"10\" spellcheck=\"false\"><\/textarea><\/div>\n<div class=\"qt-field\"><label for=\"qt-rd-out\">Result<\/label><textarea id=\"qt-rd-out\" rows=\"10\" readonly spellcheck=\"false\"><\/textarea><\/div>\n<\/div>\n<div class=\"qt-grid\">\n<div class=\"qt-field\"><label for=\"qt-rd-mode\">Output<\/label><select id=\"qt-rd-mode\"><option value=\"first\" selected>Remove duplicates, keep first copy<\/option><option value=\"once\">Only lines that appear once<\/option><option value=\"dupes\">Only the duplicated lines, with counts<\/option><\/select><\/div>\n<div class=\"qt-field\"><label for=\"qt-rd-sort\">Order<\/label><select id=\"qt-rd-sort\"><option value=\"\" selected>Keep original order<\/option><option value=\"az\">Sort A to Z<\/option><option value=\"za\">Sort Z to A<\/option><\/select><\/div>\n<\/div>\n<div class=\"qt-row\"><label class=\"qt-check\"><input type=\"checkbox\" id=\"qt-rd-case\" checked> Ignore capital letters<\/label><label class=\"qt-check\"><input type=\"checkbox\" id=\"qt-rd-trim\" checked> Ignore extra spaces<\/label><label class=\"qt-check\"><input type=\"checkbox\" id=\"qt-rd-blank\" checked> Remove blank lines<\/label><\/div>\n<div class=\"qt-stats\">\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-rd-a\">0<\/span><span class=\"qt-lab\">Lines in<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-rd-b\">0<\/span><span class=\"qt-lab\">Lines out<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-rd-c\">0<\/span><span class=\"qt-lab\">Removed<\/span><\/div>\n<\/div>\n<div class=\"qt-row\"><button type=\"button\" class=\"qt-btn\" id=\"qt-rd-copy\">Copy result<\/button><button type=\"button\" class=\"qt-btn qt-btn-ghost\" id=\"qt-rd-use\">Use result as input<\/button><button type=\"button\" class=\"qt-btn qt-btn-ghost\" id=\"qt-rd-clear\">Clear<\/button><\/div>\n<div class=\"qt-status\" id=\"qt-rd-status\" aria-live=\"polite\"><\/div>\n<p class=\"qt-note\">Everything runs in your browser. Nothing you enter is sent to or stored on our server.<\/p>\n<\/div>\n<p><script>(function () { function qtReady(fn) { if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', fn); } else { fn(); } } function qtCopy(text, statusEl, okMsg) { function done(ok) { if (statusEl) { statusEl.textContent = ok ? (okMsg || 'Copied to clipboard.') : 'Press Ctrl+C (or Cmd+C) to copy.'; } } function fallback() { var ta = document.createElement('textarea'); ta.value = text; ta.setAttribute('readonly', ''); ta.style.position = 'fixed'; ta.style.top = '-1000px'; document.body.appendChild(ta); ta.select(); var ok = false; try { ok = document.execCommand('copy'); } catch (e) { ok = false; } document.body.removeChild(ta); done(ok); } if (navigator.clipboard) { if (window.isSecureContext) { navigator.clipboard.writeText(text).then(function () { done(true); }, fallback); return; } } fallback(); } function qtRand32() { var c = window.crypto || window.msCrypto; if (c) { if (c.getRandomValues) { var a = new Uint32Array(1); c.getRandomValues(a); return a[0]; } } return Math.floor(Math.random() * 4294967296); } function qtRandInt(range) { if (range === 4294967296) { return qtRand32(); } var limit = Math.floor(4294967296 \/ range) * range; var x = qtRand32(); while (x >= limit) { x = qtRand32(); } return x % range; } qtReady(function () { var ta = document.getElementById('qt-rd-in'); if (!ta) { return; } function $(id) { return document.getElementById(id); } var out = $('qt-rd-out'); function upd() { var lines = ta.value.split(\/\\r?\\n\/); if (ta.value === '') { lines = []; } var ic = $('qt-rd-case').checked, tr = $('qt-rd-trim').checked, nb = $('qt-rd-blank').checked; var mode = $('qt-rd-mode').value; function key(l) { var k = tr ? l.trim().replace(\/\\s+\/g, ' ') : l; return ic ? k.toLowerCase() : k; } var seen = {}, order = []; lines.forEach(function (l) { if (nb) { if (!l.trim()) { return; } } var k = '#' + key(l); if (seen[k]) { seen[k].n++; } else { seen[k] = { n: 1, line: tr ? l.trim().replace(\/\\s+\/g, ' ') : l }; order.push(k); } }); var res = []; order.forEach(function (k) { var o = seen[k]; if (mode === 'first') { res.push(o.line); } if (mode === 'once') { if (o.n === 1) { res.push(o.line); } } if (mode === 'dupes') { if (o.n > 1) { res.push(o.line + '  (' + o.n + ' times)'); } } }); var s = $('qt-rd-sort').value; if (s) { res.sort(function (a, b) { return a.localeCompare(b, undefined, { sensitivity: 'base', numeric: true }); }); if (s === 'za') { res.reverse(); } } out.value = res.join('\\n'); $('qt-rd-a').textContent = lines.length.toLocaleString('en-US'); $('qt-rd-b').textContent = res.length.toLocaleString('en-US'); $('qt-rd-c').textContent = mode === 'first' ? (lines.length - res.length).toLocaleString('en-US') : '-'; } ta.addEventListener('input', upd); ['qt-rd-mode', 'qt-rd-sort', 'qt-rd-case', 'qt-rd-trim', 'qt-rd-blank'].forEach(function (id) { $(id).addEventListener('change', upd); }); $('qt-rd-copy').addEventListener('click', function () { qtCopy(out.value, $('qt-rd-status'), 'Result copied.'); }); $('qt-rd-use').addEventListener('click', function () { ta.value = out.value; upd(); $('qt-rd-status').textContent = 'Result moved to the input box.'; }); $('qt-rd-clear').addEventListener('click', function () { ta.value = ''; upd(); $('qt-rd-status').textContent = ''; ta.focus(); }); ta.value = 'apple\\nBanana\\napple\\ncherry\\nbanana\\n\\n  cherry \\ndate'; upd(); }); })();<\/script><\/p>\n<div class=\"qt-next\">\n<p class=\"qt-next-h\">Try another free tool<\/p>\n<div class=\"qt-next-g\"><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/word-counter\/\">Word Counter<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/case-converter\/\">Case Converter<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/remove-blank-lines\/\">Remove Blank Lines<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/alphabetical-order\/\">Alphabetical Order<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/diff-checker\/\">Diff Checker<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/online-notepad\/\">Online Notepad<\/a><\/div>\n<\/div>\n<p><strong>Quick answer:<\/strong> Paste your list on the left. The right box shows the same list with every repeated line removed, keeping the first copy in place. Copy it with one click.<\/p>\n<h2>How to remove duplicate lines<\/h2>\n<ol>\n<li>Paste your list into the left box, one item per line. A small sample is loaded to show how it works.<\/li>\n<li>Leave <strong>Ignore capital letters<\/strong> ticked if &#8220;Apple&#8221; and &#8220;apple&#8221; should count as the same line.<\/li>\n<li>Leave <strong>Ignore extra spaces<\/strong> ticked to treat lines with leading, trailing or double spaces as duplicates.<\/li>\n<li>Pick an output and order, then click <strong>Copy result<\/strong>.<\/li>\n<\/ol>\n<h2>Three ways to dedupe a list<\/h2>\n<ul>\n<li><strong>Keep first copy:<\/strong> the usual choice. Every line appears once, in the order it first appeared.<\/li>\n<li><strong>Only lines that appear once:<\/strong> drops every line that has a duplicate, including the first copy. Useful for finding items that are in one list but not another: paste both lists together and the unique lines are the differences.<\/li>\n<li><strong>Only the duplicated lines:<\/strong> lists each repeated line with how many times it appears, so you can see what was doubled up.<\/li>\n<\/ul>\n<h2>Removing duplicates in Excel, Google Sheets or the command line<\/h2>\n<p>In Excel, select the column and use <strong>Data &gt; Remove Duplicates<\/strong>. In Google Sheets, use <strong>Data &gt; Data cleanup &gt; Remove duplicates<\/strong> or the formula <code>=UNIQUE(A:A)<\/code>. On Mac or Linux, <code>sort -u file.txt<\/code> removes duplicates but also sorts the list; <code>awk '!seen[$0]++' file.txt<\/code> keeps the original order. This page is quicker when you just need to clean a pasted list.<\/p>\n<p>Need more cleanup? The <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/remove-blank-lines\/\">remove blank lines<\/a> tool strips empty lines and HTML tags, <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/alphabetical-order\/\">alphabetical order<\/a> sorts lists in many ways, and <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/find-and-replace\/\">find and replace<\/a> changes words across the whole list.<\/p>\n<h2>FAQ<\/h2>\n<h3>Does it keep the original order?<\/h3>\n<p>Yes, unless you choose a sort. The first time a line appears is where it stays.<\/p>\n<h3>How big a list can I paste?<\/h3>\n<p>Lists of several hundred thousand lines work in a modern browser.<\/p>\n<h3>Is my list uploaded?<\/h3>\n<p>No. The tool runs in your browser, so email lists and other private data never leave your device.<\/p>\n<h2>More free tools<\/h2>\n<div class=\"qt-cards\"><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/word-counter\/\"><strong>Word Counter<\/strong><span>Count words, characters, sentences and reading time.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/case-converter\/\"><strong>Case Converter<\/strong><span>Change text to UPPERCASE, lowercase, Title Case and more.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/remove-blank-lines\/\"><strong>Remove Blank Lines<\/strong><span>Delete empty lines, strip HTML tags and duplicate lines.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/alphabetical-order\/\"><strong>Alphabetical Order<\/strong><span>Sort any list A to Z, Z to A, by length or at random.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/diff-checker\/\"><strong>Diff Checker<\/strong><span>Compare two texts and highlight every change.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/online-notepad\/\"><strong>Online Notepad<\/strong><span>Write quick notes that are saved in your browser. Download as .txt.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/lorem-ipsum-generator\/\"><strong>Lorem Ipsum Generator<\/strong><span>Placeholder paragraphs, sentences or words for mockups.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/character-counter\/\"><strong>Character Counter<\/strong><span>Count characters with limits for X, SMS and meta tags.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/word-frequency-counter\/\"><strong>Word Frequency Counter<\/strong><span>Find the most used words and phrases in any text.<\/span><\/a><\/div>\n<p>See all of them on the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/\">QuickOnlineTips free online tools<\/a> page and play our <a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/\">free online games<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Paste a list and this tool will remove duplicate lines instantly, keeping the first copy of each line in its original order. It works for email lists, keywords, URLs, names and spreadsheet columns, and can ignore differences in capital letters and extra spaces. Your list (one item per line) Result OutputRemove duplicates, keep first copyOnly&#8230;<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":65595,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"class_list":["post-65837","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65837","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/comments?post=65837"}],"version-history":[{"count":3,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65837\/revisions"}],"predecessor-version":[{"id":66454,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65837\/revisions\/66454"}],"up":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65595"}],"wp:attachment":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/media?parent=65837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}