{"id":151,"date":"2026-08-20T19:18:15","date_gmt":"2026-08-20T19:18:15","guid":{"rendered":"https:\/\/netguide.io\/tools\/regular-expression-tester\/"},"modified":"2026-08-20T19:18:15","modified_gmt":"2026-08-20T19:18:15","slug":"regular-expression-tester","status":"publish","type":"post","link":"https:\/\/netguide.io\/tools\/en\/regular-expression-tester\/","title":{"rendered":"Regex Tester"},"content":{"rendered":"<div id=\"netgu-2514159705\" class=\"netgu-before-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"3494115342\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>\n<style>\n.wp-re-container { max-width:100%; background:#fff; padding:20px; border:1px solid #ddd; border-radius:10px; font-family:-apple-system, sans-serif; color:#333; }\n.wp-re-title { margin:0 0 15px 0; color:#2271b1; font-size:1.4rem; }\n.wp-re-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(140px, 1fr)); gap:12px; margin-bottom:10px; }\n.wp-re-input-group label { display:block; font-size:11px; font-weight:bold; margin-bottom:4px; text-transform:uppercase; color:#666; }\n.wp-re-input-group input, .wp-re-input-group select { width:100%; padding:8px; border:1px solid #ccc; border-radius:4px; box-sizing:border-box; }\n.wp-re-checkbox-group { margin:15px 0; font-size:12px; display:flex; align-items:center; gap:8px; color:#666; }\n.wp-re-note { font-size:12px; color:#666; margin-top:12px; min-height:1em; }\n.wp-re-warn { color:#d63638; font-weight:bold; }\n.wp-re-results { margin-top:20px; border-top:2px solid #eee; padding-top:15px; }\n.wp-re-res-item { display:flex; justify-content:space-between; margin-bottom:6px; font-size:14px; gap:10px; }\n.wp-re-total { font-weight:bold; font-size:18px; color:#2271b1; margin:10px 0; padding:5px 0; border-top:1px solid #eee; border-bottom:1px solid #eee; }\n.wp-re-val { color:#2271b1; font-weight:bold; }\n.wp-re-out { width:100%; box-sizing:border-box; padding:10px; border:1px solid #ccc; border-radius:4px; font-family:monospace; font-size:13px; word-break:break-all; background:#f7f7f7; margin-top:6px; }\n.wp-re-btn { background:#2271b1; color:#fff; border:none; padding:9px 14px; border-radius:4px; cursor:pointer; font-size:13px; margin-top:10px; }\n<\/style><style>\n.wp-re-area { width:100%; height:120px; padding:10px; border:1px solid #ccc; border-radius:5px; font-family:'Courier New',monospace; font-size:13px; resize:vertical; box-sizing:border-box; }\n.wp-re-status { padding:8px 10px; border-radius:5px; font-size:13px; font-weight:bold; margin:10px 0; background:#f9f9f9; border:1px solid #eee; }\n.wp-re-status.wp-re-ok { background:#e7f7ed; color:#2e7d32; border-color:#a5d6a7; }\n.wp-re-status.wp-re-bad { background:#fdf2f2; color:#d32f2f; border-color:#ef9a9a; }\n.wp-re-out { font-size:13px; }\n.wp-re-item { padding:6px 8px; border-bottom:1px solid #eee; }\n.wp-re-item code { background:#eef4fb; padding:1px 5px; border-radius:3px; }\n.wp-re-groups { color:#666; font-size:12px; }\n<\/style><script>window.wpReL = {\"waiting\":\"Enter a pattern\u2026\",\"invalid\":\"Invalid pattern\",\"matches\":\"matches\"};<\/script>\n<div class=\"wp-re-container\">\n  <h3 class=\"wp-re-title\">Regex Tester<\/h3>\n  <div class=\"wp-re-grid\">\n    <div class=\"wp-re-input-group\" style=\"grid-column:1\/-1;\"><label>Pattern<\/label><input type=\"text\" id=\"re-pat\" value=\"\\d+\" oninput=\"runRegex()\"><\/div>\n    <div class=\"wp-re-input-group\"><label>Flags (g, i, m, s, u, y)<\/label><input type=\"text\" id=\"re-flags\" value=\"g\" oninput=\"runRegex()\"><\/div>\n  <\/div>\n  <div class=\"wp-re-input-group\" style=\"margin-top:10px;\"><label>Test text<\/label><textarea id=\"re-text\" class=\"wp-re-area\" oninput=\"runRegex()\">Bestellung 123, Rechnung 456, Kunde 789<\/textarea><\/div>\n  <div id=\"re-status\" class=\"wp-re-status\"><\/div>\n  <div id=\"re-out\" class=\"wp-re-out\"><\/div>\n<\/div>\n<script>\nfunction reEsc(s){ return String(s).replace(\/&\/g,'&amp;').replace(\/<\/g,'&lt;').replace(\/>\/g,'&gt;'); }\nfunction runRegex(){\n  var L=window.wpReL||{};\n  var pat=document.getElementById('re-pat').value;\n  var flags=document.getElementById('re-flags').value;\n  var text=document.getElementById('re-text').value;\n  var st=document.getElementById('re-status'); var box=document.getElementById('re-out');\n  if(!pat){ st.className='wp-re-status'; st.innerText=L.waiting||''; box.innerHTML=''; return; }\n  var rx;\n  try{ rx=new RegExp(pat,flags); }catch(e){ st.className='wp-re-status wp-re-bad'; st.innerText=(L.invalid||'Invalid')+': '+e.message; box.innerHTML=''; return; }\n  var matches=[],m,guard=0;\n  if(flags.indexOf('g')>=0){ while((m=rx.exec(text))!==null){ matches.push(m); if(m.index===rx.lastIndex) rx.lastIndex++; if(++guard>5000) break; } }\n  else { m=rx.exec(text); if(m) matches.push(m); }\n  st.className='wp-re-status wp-re-ok'; st.innerText=matches.length+' '+(L.matches||'matches');\n  var html='';\n  for(var i=0;i<matches.length;i++){ var mm=matches[i]; html+='<div class=\"wp-re-item\"><strong>#'+(i+1)+'<\/strong> @'+mm.index+': <code>'+reEsc(mm[0])+'<\/code>';\n    if(mm.length>1){ var g=[]; for(var j=1;j<mm.length;j++){ g.push('$'+j+'='+(mm[j]===undefined?'\\u2014':reEsc(mm[j]))); } html+=' <span class=\"wp-re-groups\">'+g.join(', ')+'<\/span>'; }\n    html+='<\/div>'; }\n  box.innerHTML=html;\n}\nrunRegex();\n<\/script>\n\n\n<div id=\"netgu-1875814286\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- NetGuide.io-After-Widget-Tools -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6258556257245998\"\r\n     data-ad-slot=\"5175852350\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Test regular expressions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Enter a pattern and a test text \u2013 the regex tester instantly shows all matches with their position and captured groups. It uses your browser&#8217;s native JavaScript regex engine.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flags:<\/strong> <code>g<\/code> (global, all matches), <code>i<\/code> (ignore case), <code>m<\/code> (multiline), <code>s<\/code> (dot matches newline), <code>u<\/code> (Unicode), <code>y<\/code> (sticky).<\/li>\n\n\n<li><strong>Groups:<\/strong> Captured groups appear per match as <code>$1<\/code>, <code>$2<\/code> \u2026<\/li>\n\n\n<li><strong>Without the g flag<\/strong>, only the first match is shown.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Related tools<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"\/tools\/en\/json-formatter\/\">JSON Formatter &#038; Validator<\/a><\/li>\n\n\n<li><a href=\"\/tools\/en\/cronjob-generator-2\/\">Cronjob Generator<\/a><\/li>\n<\/ul>\n\n\n<div id=\"netgu-622473267\" class=\"netgu-after-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"4559785002\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Test regular expressions online \u2013 with flags, a live match list and groups. Uses the JavaScript regex engine, runs in the browser.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[131],"tags":[],"class_list":["post-151","post","type-post","status-publish","format-standard","hentry","category-validator-en"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts\/151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/comments?post=151"}],"version-history":[{"count":0,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts\/151\/revisions"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/media?parent=151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/categories?post=151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/tags?post=151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}