{"id":243,"date":"2026-08-21T18:30:32","date_gmt":"2026-08-21T18:30:32","guid":{"rendered":"https:\/\/netguide.io\/tools\/iban-validator\/"},"modified":"2026-08-21T18:30:32","modified_gmt":"2026-08-21T18:30:32","slug":"iban-validator","status":"publish","type":"post","link":"https:\/\/netguide.io\/tools\/en\/iban-validator\/","title":{"rendered":"IBAN Validator"},"content":{"rendered":"<div id=\"netgu-136165174\" 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-iban-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-iban-title { margin:0 0 15px 0; color:#2271b1; font-size:1.4rem; }\n.wp-iban-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(140px, 1fr)); gap:12px; margin-bottom:10px; }\n.wp-iban-input-group label { display:block; font-size:11px; font-weight:bold; margin-bottom:4px; text-transform:uppercase; color:#666; }\n.wp-iban-input-group input, .wp-iban-input-group select { width:100%; padding:8px; border:1px solid #ccc; border-radius:4px; box-sizing:border-box; }\n.wp-iban-checkbox-group { margin:15px 0; font-size:12px; display:flex; align-items:center; gap:8px; color:#666; }\n.wp-iban-note { font-size:12px; color:#666; margin-top:12px; min-height:1em; }\n.wp-iban-warn { color:#d63638; font-weight:bold; }\n.wp-iban-results { margin-top:20px; border-top:2px solid #eee; padding-top:15px; }\n.wp-iban-res-item { display:flex; justify-content:space-between; margin-bottom:6px; font-size:14px; gap:10px; }\n.wp-iban-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-iban-val { color:#2271b1; font-weight:bold; }\n.wp-iban-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-iban-btn { background:#2271b1; color:#fff; border:none; padding:9px 14px; border-radius:4px; cursor:pointer; font-size:13px; margin-top:10px; }\n<\/style><style>.wp-iban-res{padding:12px;border-radius:6px;font-size:15px;font-weight:bold;margin-top:12px;background:#f9f9f9;border:1px solid #eee;min-height:1em;}.wp-iban-res.ok{background:#e7f7ed;color:#2e7d32;border-color:#a5d6a7;}.wp-iban-res.bad{background:#fdf2f2;color:#d32f2f;border-color:#ef9a9a;}<\/style><script>window.wpIbanL = {\"waiting\":\"Enter IBAN\u2026\",\"chars\":\"Invalid characters\",\"short\":\"Too short\",\"long\":\"Too long\",\"valid\":\"Valid IBAN (checksum correct)\",\"invalid\":\"Invalid checksum\",\"country\":\"Country\"};<\/script>\n<div class=\"wp-iban-container\">\n  <h3 class=\"wp-iban-title\">IBAN Validator<\/h3>\n  <div class=\"wp-iban-input-group\"><label>IBAN<\/label><input type=\"text\" id=\"iban-in\" value=\"DE89 3704 0044 0532 0130 00\" oninput=\"ibanCheck()\"><\/div>\n  <div id=\"iban-res\" class=\"wp-iban-res\"><\/div>\n  <div id=\"iban-det\" class=\"wp-iban-note\" style=\"margin-top:8px;\"><\/div>\n  <div class=\"wp-iban-note\">The mathematical checksum (modulo 97) is checked, not whether the account exists. No data transmission.<\/div>\n<\/div>\n<script>\nfunction ibanCheck(){\n  var raw=document.getElementById('iban-in').value; var s=String(raw).replace(\/\\s\/g,'').toUpperCase(); var box=document.getElementById('iban-res'); var det=document.getElementById('iban-det'); var L=window.wpIbanL||{};\n  if(!s){ box.className='wp-iban-res'; box.innerText=L.waiting||''; det.innerText=''; return; }\n  if(!\/^[A-Z0-9]+$\/.test(s)){ box.className='wp-iban-res bad'; box.innerText='\\u2717 '+(L.chars||'Invalid characters'); det.innerText=''; return; }\n  if(s.length<15){ box.className='wp-iban-res bad'; box.innerText='\\u2717 '+(L.short||'Too short'); det.innerText=''; return; }\n  if(s.length>34){ box.className='wp-iban-res bad'; box.innerText='\\u2717 '+(L.long||'Too long'); det.innerText=''; return; }\n  var re=s.slice(4)+s.slice(0,4);\n  var num=re.replace(\/[A-Z]\/g,function(c){ return (c.charCodeAt(0)-55).toString(); });\n  var rem=0; for(var i=0;i<num.length;i++){ rem=(rem*10+parseInt(num[i],10))%97; }\n  var grouped=s.replace(\/(.{4})\/g,'$1 ').trim();\n  if(rem===1){ box.className='wp-iban-res ok'; box.innerText='\\u2713 '+(L.valid||'Valid IBAN'); det.innerText=(L.country||'Country')+': '+s.slice(0,2)+'  \\u00b7  '+grouped; }\n  else { box.className='wp-iban-res bad'; box.innerText='\\u2717 '+(L.invalid||'Invalid checksum'); det.innerText=''; }\n}\nibanCheck();\n<\/script>\n\n\n<div id=\"netgu-2414279456\"><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\">Understanding the IBAN checksum<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Every IBAN contains a two-digit check number that helps detect typos. The validator applies the standard method (modulo 97 per ISO 7064) and instantly reports whether the IBAN is mathematically consistent.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Modulo 97:<\/strong> The first four characters are moved to the end, letters converted to numbers, and the remainder of division by 97 is computed \u2013 it must equal 1.<\/li>\n\n\n<li><strong>What is checked:<\/strong> Format, length and checksum. It does not check whether the account actually exists.<\/li>\n\n\n<li><strong>Privacy:<\/strong> The calculation runs locally in the browser.<\/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\/credit-card-luhn-checker\/\">Credit Card Checker (Luhn)<\/a><\/li>\n\n\n<li><a href=\"\/tools\/en\/percentage-vat-calculator\/\">Percentage & VAT Calculator<\/a><\/li>\n<\/ul>\n\n\n<div id=\"netgu-3504993469\" 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>Validate an IBAN \u2013 via the checksum per ISO 7064 (modulo 97). Runs entirely in the browser, nothing is sent.<\/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-243","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\/243","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=243"}],"version-history":[{"count":0,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/posts\/243\/revisions"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/media?parent=243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/categories?post=243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/tools\/wp-json\/wp\/v2\/tags?post=243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}