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reCAPTCHA v3 | Google for Developers
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type="application/opensearchdescription+xml" title="Google for Developers" href="https://developers.google.com/s/opensearch.xml"> <link rel="alternate" hreflang="en" href="https://developers.google.com/recaptcha/docs/v3" /><link rel="alternate" hreflang="x-default" href="https://developers.google.com/recaptcha/docs/v3" /><link rel="alternate" hreflang="ar" href="https://developers.google.com/recaptcha/docs/v3?hl=ar" /><link rel="alternate" hreflang="bn" href="https://developers.google.com/recaptcha/docs/v3?hl=bn" /><link rel="alternate" hreflang="zh-Hans" href="https://developers.google.com/recaptcha/docs/v3?hl=zh-cn" /><link rel="alternate" hreflang="zh-Hant" href="https://developers.google.com/recaptcha/docs/v3?hl=zh-tw" /><link rel="alternate" hreflang="fa" href="https://developers.google.com/recaptcha/docs/v3?hl=fa" /><link rel="alternate" hreflang="fr" href="https://developers.google.com/recaptcha/docs/v3?hl=fr" /><link rel="alternate" hreflang="de" 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href="https://developers.google.com/recaptcha/docs/v3?hl=es-419" /><link rel="alternate" hreflang="th" href="https://developers.google.com/recaptcha/docs/v3?hl=th" /><link rel="alternate" hreflang="tr" href="https://developers.google.com/recaptcha/docs/v3?hl=tr" /><link rel="alternate" hreflang="vi" href="https://developers.google.com/recaptcha/docs/v3?hl=vi" /><title>reCAPTCHA v3 | Google for Developers</title> <meta property="og:title" content="reCAPTCHA v3 | Google for Developers"><meta property="og:url" content="https://developers.google.com/recaptcha/docs/v3"><meta property="og:image" content="https://www.gstatic.com/devrel-devsite/prod/v870e399c64f7c43c99a3043db4b3a74327bb93d0914e84a0c3dba90bbfd67625/developers/images/opengraph/google-blue.png"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="675"><meta property="og:locale" content="en"><meta name="twitter:card" content="summary_large_image"><script type="application/ld+json"> { "@context": "https://schema.org", "@type": "Article", "headline": "reCAPTCHA v3" } </script><script type="application/ld+json"> { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{ "@type": "ListItem", "position": 1, "name": "reCAPTCHA", "item": "https://developers.google.com/recaptcha" },{ "@type": "ListItem", "position": 2, "name": "reCAPTCHA v3", "item": "https://developers.google.com/recaptcha/docs/v3" }] } </script> <link rel="stylesheet" href="/extras.css"></head> <body class="" template="page" theme="google-blue" type="article" layout="docs" concierge='closed' display-toc pending> <devsite-progress type="indeterminate" id="app-progress"></devsite-progress> <section class="devsite-wrapper"> <devsite-cookie-notification-bar></devsite-cookie-notification-bar><devsite-header role="banner"> <div class="devsite-header--inner nocontent"> <div class="devsite-top-logo-row-wrapper-wrapper"> <div class="devsite-top-logo-row-wrapper"> <div class="devsite-top-logo-row"> <button type="button" id="devsite-hamburger-menu" class="devsite-header-icon-button button-flat material-icons gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Navigation menu button" visually-hidden aria-label="Open menu"> </button> <div class="devsite-product-name-wrapper"> <a href="https://developers.google.com/recaptcha"> <div class="devsite-product-logo-container" size="medium" > <picture> <img class="devsite-product-logo" alt="reCAPTCHA" src="https://www.gstatic.com/images/icons/material/product/2x/recaptcha_48dp.png" srcset=" https://www.gstatic.com/images/icons/material/product/2x/recaptcha_48dp.png" sizes="64px" loading="lazy" > </picture> </div> </a> <span class="devsite-product-name"> <ul class="devsite-breadcrumb-list" > <li class="devsite-breadcrumb-item "> <a href="https://developers.google.com/recaptcha" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Upper Header" data-value="1" track-type="globalNav" track-name="breadcrumb" track-metadata-position="1" track-metadata-eventdetail="reCAPTCHA" > reCAPTCHA </a> </li> </ul> </span> </div> <div class="devsite-top-logo-row-middle"> <div class="devsite-header-upper-tabs"> </div> <devsite-search enable-signin enable-search enable-suggestions enable-query-completion project-name="reCAPTCHA" tenant-name="Google for Developers" project-scope="/recaptcha" url-scoped="https://developers.google.com/s/results/recaptcha" > <form class="devsite-search-form" action="https://developers.google.com/s/results" method="GET"> <div class="devsite-search-container"> <button type="button" search-open class="devsite-search-button devsite-header-icon-button button-flat material-icons" aria-label="Open search"></button> <div class="devsite-searchbox"> <input aria-activedescendant="" aria-autocomplete="list" aria-label="Search" aria-expanded="false" aria-haspopup="listbox" autocomplete="off" class="devsite-search-field devsite-search-query" name="q" placeholder="Search" role="combobox" type="text" value="" > <div class="devsite-search-image material-icons" aria-hidden="true"> </div> <div class="devsite-search-shortcut-icon-container" aria-hidden="true"> <kbd class="devsite-search-shortcut-icon">/</kbd> </div> </div> </div> </form> <button type="button" search-close class="devsite-search-button devsite-header-icon-button button-flat material-icons" aria-label="Close search"></button> </devsite-search> </div> <devsite-language-selector> <ul role="presentation"> <li role="presentation"> <a role="menuitem" lang="en" >English</a> </li> <li role="presentation"> <a role="menuitem" lang="de" >Deutsch</a> </li> <li role="presentation"> <a role="menuitem" lang="es" >Español</a> </li> <li role="presentation"> <a role="menuitem" lang="es_419" >Español – América Latina</a> </li> <li role="presentation"> <a role="menuitem" lang="fr" >Français</a> </li> <li role="presentation"> <a role="menuitem" lang="id" >Indonesia</a> </li> <li role="presentation"> <a role="menuitem" lang="it" >Italiano</a> </li> <li role="presentation"> <a role="menuitem" lang="pl" >Polski</a> </li> <li role="presentation"> <a role="menuitem" lang="pt_br" >Português – Brasil</a> </li> <li role="presentation"> <a role="menuitem" lang="vi" >Tiếng Việt</a> </li> <li role="presentation"> <a role="menuitem" lang="tr" >Türkçe</a> </li> <li role="presentation"> <a role="menuitem" lang="ru" >Русский</a> </li> <li role="presentation"> <a role="menuitem" lang="he" >עברית</a> </li> <li role="presentation"> <a role="menuitem" lang="ar" >العربيّة</a> </li> <li role="presentation"> <a role="menuitem" lang="fa" >فارسی</a> </li> <li role="presentation"> <a role="menuitem" lang="hi" >हिंदी</a> </li> <li role="presentation"> <a role="menuitem" lang="bn" >বাংলা</a> </li> <li role="presentation"> <a role="menuitem" lang="th" >ภาษาไทย</a> </li> <li role="presentation"> <a role="menuitem" lang="zh_cn" >中文 – 简体</a> </li> <li role="presentation"> <a role="menuitem" lang="zh_tw" >中文 – 繁體</a> </li> <li role="presentation"> <a role="menuitem" lang="ja" >日本語</a> </li> <li role="presentation"> <a role="menuitem" lang="ko" >한국어</a> </li> </ul> </devsite-language-selector> <devsite-user enable-profiles fp-auth id="devsite-user"> <span class="button devsite-top-button" aria-hidden="true" visually-hidden>Sign in</span> </devsite-user> </div> </div> </div> <div class="devsite-collapsible-section "> <div class="devsite-header-background"> <div class="devsite-doc-set-nav-row"> <devsite-tabs class="lower-tabs"> <nav class="devsite-tabs-wrapper" aria-label="Lower tabs"> <tab > <a href="https://developers.google.com/recaptcha" track-metadata-eventdetail="https://developers.google.com/recaptcha" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - home" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: Home" track-name="home" > Home </a> </tab> <tab class="devsite-active"> <a href="https://developers.google.com/recaptcha/intro" track-metadata-eventdetail="https://developers.google.com/recaptcha/intro" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - guides" track-metadata-module="primary nav" aria-label="Guides, selected" data-category="Site-Wide Custom Events" data-label="Tab: Guides" track-name="guides" > Guides </a> </tab> <tab > <a href="https://developers.google.com/recaptcha/docs/faq" track-metadata-eventdetail="https://developers.google.com/recaptcha/docs/faq" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - support" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: Support" track-name="support" > Support </a> </tab> </nav> </devsite-tabs> </div> </div> </div> </div> </devsite-header> <devsite-book-nav scrollbars > <div class="devsite-book-nav-filter" > <span class="filter-list-icon material-icons" aria-hidden="true"></span> <input type="text" placeholder="Filter" aria-label="Type to filter" role="searchbox"> <span class="filter-clear-button hidden" data-title="Clear filter" aria-label="Clear filter" role="button" tabindex="0"></span> </div> <nav class="devsite-book-nav devsite-nav nocontent" aria-label="Side menu"> <div class="devsite-mobile-header"> <button type="button" id="devsite-close-nav" class="devsite-header-icon-button button-flat material-icons gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Close navigation" aria-label="Close navigation"> </button> <div class="devsite-product-name-wrapper"> <a href="https://developers.google.com/recaptcha"> <div class="devsite-product-logo-container" size="medium" > <picture> <img class="devsite-product-logo" alt="reCAPTCHA" src="https://www.gstatic.com/images/icons/material/product/2x/recaptcha_48dp.png" srcset=" https://www.gstatic.com/images/icons/material/product/2x/recaptcha_48dp.png" sizes="64px" loading="lazy" > </picture> </div> </a> <span class="devsite-product-name"> <ul class="devsite-breadcrumb-list" > <li class="devsite-breadcrumb-item "> <a href="https://developers.google.com/recaptcha" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Upper Header" data-value="1" track-type="globalNav" track-name="breadcrumb" track-metadata-position="1" track-metadata-eventdetail="reCAPTCHA" > reCAPTCHA </a> </li> </ul> </span> </div> </div> <div class="devsite-book-nav-wrapper"> <div class="devsite-mobile-nav-top"> <ul class="devsite-nav-list"> <li class="devsite-nav-item"> <a href="/recaptcha" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Home" track-name="home" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Home" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Home </span> </a> </li> <li class="devsite-nav-item"> <a href="/recaptcha/intro" class="devsite-nav-title gc-analytics-event devsite-nav-has-children devsite-nav-active" data-category="Site-Wide Custom Events" data-label="Tab: Guides" track-name="guides" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Guides" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Guides </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> <li class="devsite-nav-item"> <a href="/recaptcha/docs/faq" class="devsite-nav-title gc-analytics-event devsite-nav-has-children " data-category="Site-Wide Custom Events" data-label="Tab: Support" track-name="support" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Support" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Support </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> </ul> </div> <div class="devsite-mobile-nav-bottom"> <ul class="devsite-nav-list" menu="_book"> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Get Started</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/recaptcha/intro" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/intro" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/intro" ><span class="devsite-nav-text" tooltip>Introduction</span></a></li><li class="devsite-nav-item"><a href="/recaptcha/docs/versions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/versions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/versions" ><span class="devsite-nav-text" tooltip>Choose a Type</span></a></li><li class="devsite-nav-item"><a href="/recaptcha/docs/loading" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/loading" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/loading" ><span class="devsite-nav-text" tooltip>Loading reCAPTCHA</span></a></li></ul></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>reCAPTCHA v3</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item devsite-nav-new"><a href="/recaptcha/docs/v3" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/v3" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/v3" ><span class="devsite-nav-text" tooltip>reCAPTCHA v3</span><span class="devsite-nav-icon material-icons" data-icon="new" data-title="New!" aria-hidden="true"></span></a></li></ul></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>reCAPTCHA v2</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/recaptcha/docs/display" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/display" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/display" ><span class="devsite-nav-text" tooltip>Checkbox</span></a></li><li class="devsite-nav-item"><a href="/recaptcha/docs/invisible" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/invisible" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/invisible" ><span class="devsite-nav-text" tooltip>Invisible</span></a></li><li class="devsite-nav-item devsite-nav-external"><a href="https://developer.android.com/training/safetynet/recaptcha.html" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: https://developer.android.com/training/safetynet/recaptcha.html" track-type="bookNav" track-name="click" track-metadata-eventdetail="https://developer.android.com/training/safetynet/recaptcha.html" ><span class="devsite-nav-text" tooltip>Android</span><span class="devsite-nav-icon material-icons" data-icon="external" data-title="External" aria-hidden="true"></span></a></li></ul></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Server Side Validation</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/recaptcha/docs/verify" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/verify" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/verify" ><span class="devsite-nav-text" tooltip>Verify the User’s Response</span></a></li><li class="devsite-nav-item"><a href="/recaptcha/docs/domain_validation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/domain_validation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/domain_validation" ><span class="devsite-nav-text" tooltip>Domain/Package Name Validation</span></a></li></ul></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Admin Console</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/recaptcha/docs/settings" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/settings" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/settings" ><span class="devsite-nav-text" tooltip>Settings</span></a></li><li class="devsite-nav-item"><a href="/recaptcha/docs/analytics" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/analytics" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/analytics" ><span class="devsite-nav-text" tooltip>Analytics</span></a></li></ul></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Additional Settings</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/recaptcha/docs/language" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /recaptcha/docs/language" track-type="bookNav" track-name="click" track-metadata-eventdetail="/recaptcha/docs/language" ><span class="devsite-nav-text" tooltip>Language Codes</span></a></li></ul></li> </ul> </div> </div> </nav> </devsite-book-nav> <section id="gc-wrapper"> <main role="main" class="devsite-main-content" has-book-nav > <devsite-content> <article class="devsite-article"> <div class="devsite-article-meta nocontent" role="navigation"> <ul class="devsite-breadcrumb-list" aria-label="Breadcrumb"> <li class="devsite-breadcrumb-item "> <a href="https://developers.google.com/" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="1" track-type="globalNav" track-name="breadcrumb" track-metadata-position="1" track-metadata-eventdetail="" > Home </a> </li> <li class="devsite-breadcrumb-item "> <div class="devsite-breadcrumb-guillemet material-icons" aria-hidden="true"></div> <a href="https://developers.google.com/products" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="2" track-type="globalNav" track-name="breadcrumb" track-metadata-position="2" track-metadata-eventdetail="" > Products </a> </li> <li class="devsite-breadcrumb-item "> <div class="devsite-breadcrumb-guillemet material-icons" aria-hidden="true"></div> <a href="https://developers.google.com/recaptcha" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="3" track-type="globalNav" track-name="breadcrumb" track-metadata-position="3" track-metadata-eventdetail="reCAPTCHA" > reCAPTCHA </a> </li> <li class="devsite-breadcrumb-item "> <div class="devsite-breadcrumb-guillemet material-icons" aria-hidden="true"></div> <a href="https://developers.google.com/recaptcha/intro" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Breadcrumbs" data-value="4" track-type="globalNav" track-name="breadcrumb" track-metadata-position="4" track-metadata-eventdetail="" > Guides </a> </li> </ul> <devsite-thumb-rating position="header"> </devsite-thumb-rating> </div> <h1 class="devsite-page-title" tabindex="-1"> reCAPTCHA v3 </h1> <devsite-feature-tooltip ack-key="AckCollectionsBookmarkTooltipDismiss" analytics-category="Site-Wide Custom Events" analytics-action-show="Callout Profile displayed" analytics-action-close="Callout Profile dismissed" analytics-label="Create Collection Callout" class="devsite-page-bookmark-tooltip nocontent" dismiss-button="true" id="devsite-collections-dropdown" dismiss-button-text="Dismiss" close-button-text="Got it"> <devsite-bookmark></devsite-bookmark> <span slot="popout-heading"> Stay organized with collections </span> <span slot="popout-contents"> Save and categorize content based on your preferences. </span> </devsite-feature-tooltip> <div class="devsite-page-title-meta"><devsite-view-release-notes></devsite-view-release-notes></div> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded > </devsite-toc> <div class="devsite-article-body clearfix "> <p>reCAPTCHA v3 returns a score for each request without user friction. The score is based on interactions with your site and enables you to take an appropriate action for your site. Register reCAPTCHA v3 keys on the <a href="https://www.google.com/recaptcha/admin/create">reCAPTCHA Admin console</a>.</p> <p>This page explains how to enable and customize reCAPTCHA v3 on your webpage.</p> <h2 id="placement_on_your_website" data-text="Placement on your website" tabindex="-1">Placement on your website</h2> <p>reCAPTCHA v3 will never interrupt your users, so you can run it whenever you like without affecting conversion. reCAPTCHA works best when it has the most context about interactions with your site, which comes from seeing both legitimate and abusive behavior. For this reason, we recommend including reCAPTCHA verification on forms or actions as well as in the background of pages for analytics.</p> <aside class="note"><strong>Note:</strong><span> reCAPTCHA tokens expire after two minutes. If you're protecting an action with reCAPTCHA, make sure to call <code translate="no" dir="ltr">execute</code> when the user takes the action rather than on page load.</span></aside> <p>You can execute reCAPTCHA on as many actions as you want on the same page.</p> <h2 id="automatically_bind_the_challenge_to_a_button" data-text="Automatically bind the challenge to a button" tabindex="-1">Automatically bind the challenge to a button</h2> <p>The easiest method for using reCAPTCHA v3 on your page is to include the necessary JavaScript resource and add a few attributes to your html button. </p> <ol> <li><p>Load the JavaScript API.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="HTML"><code translate="no" dir="ltr"> <script src="https://www.google.com/recaptcha/api.js"></script> </code></pre></devsite-code></li> <li><p>Add a callback function to handle the token.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="HTML"><code translate="no" dir="ltr"> <script> function onSubmit(token) { document.getElementById("demo-form").submit(); } </script> </code></pre></devsite-code></li> <li><p>Add attributes to your html button.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="HTML"><code translate="no" dir="ltr"><button class="g-recaptcha" data-sitekey="reCAPTCHA_site_key" data-callback='onSubmit' data-action='submit'>Submit</button> </code></pre></devsite-code></li> </ol> <h2 id="programmatically_invoke_the_challenge" data-text="Programmatically invoke the challenge" tabindex="-1">Programmatically invoke the challenge</h2> <p>If you wish to have more control over when reCAPTCHA runs, you can use the <code translate="no" dir="ltr">execute</code> method in <code translate="no" dir="ltr">grecaptcha</code> object. To do this, you need to add a <code translate="no" dir="ltr">render</code> parameter to the reCAPTCHA script load.</p> <ol> <li><p>Load the JavaScript API with your sitekey.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="HTML"><code translate="no" dir="ltr"><script src="https://www.google.com/recaptcha/api.js?render=reCAPTCHA_site_key"></script> </code></pre></devsite-code></li> <li><p>Call <code translate="no" dir="ltr">grecaptcha.execute</code> on each action you wish to protect.</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="HTML"><code translate="no" dir="ltr"> <script> function onClick(e) { e.preventDefault(); grecaptcha.ready(function() { grecaptcha.execute('reCAPTCHA_site_key', {action: 'submit'}).then(function(token) { // Add your logic to submit to your backend server here. }); }); } </script> </code></pre></devsite-code></li> <li><p>Send the token immediately to your backend with the request to <a href="/recaptcha/docs/verify">verify</a>.</p></li> </ol> <h2 id="interpreting_the_score" data-text="Interpreting the score" tabindex="-1">Interpreting the score</h2> <p>reCAPTCHA v3 returns a score (1.0 is very likely a good interaction, 0.0 is very likely a bot). Based on the score, you can take variable action in the context of your site. Every site is different, but below are some examples of how sites use the score. As in the examples below, take action behind the scenes instead of blocking traffic to better protect your site.</p> <table> <tr align="left"> <th>Use case</th> <th>Recommendation</th> </tr> <tr> <td>homepage</td> <td>See a cohesive view of your traffic on the admin console while filtering scrapers.</td> </tr> <tr> <td>login</td> <td>With low scores, require 2-factor-authentication or email verification to prevent credential stuffing attacks.</td> </tr> <tr> <td>social</td> <td>Limit unanswered friend requests from abusive users and send risky comments to moderation.</td> </tr> <tr> <td>e-commerce</td> <td>Put your real sales ahead of bots and identify risky transactions.</td> </tr> </table> <p>reCAPTCHA learns by seeing real traffic on your site. For this reason, scores in a staging environment or soon after implementing may differ from production. As reCAPTCHA v3 doesn't ever interrupt the user flow, you can first run reCAPTCHA without taking action and then decide on thresholds by looking at your traffic in the <a href="https://g.co/recaptcha/admin">admin console</a>. By default, you can use a threshold of 0.5.</p> <h2 id="actions" data-text="Actions" tabindex="-1">Actions</h2> <p>reCAPTCHA v3 introduces a new concept: actions. When you specify an action name in each place you execute reCAPTCHA, you enable the following new features:</p> <ul> <li>A detailed break-down of data for your top ten actions in the <a href="https://g.co/recaptcha/admin/">admin console</a></li> <li>Adaptive risk analysis based on the context of the action, because abusive behavior can vary.</li> </ul> <p>Importantly, when you verify the reCAPTCHA response, you should verify that the action name is the name you expect.</p> <aside class="note"><strong>Note:</strong><span> Actions might contain only alphanumeric characters, slashes, and underscores. Actions must not be user-specific.</span></aside> <h2 id="site_verify_response" data-text="Site Verify Response" tabindex="-1">Site Verify Response</h2> <p>Make the request to <a href="/recaptcha/docs/verify">verify the response token</a> as with reCAPTCHA v2 or Invisible reCAPTCHA.</p> <p>The response is a JSON object:</p> <div></div><devsite-code><pre class="devsite-click-to-copy" translate="no" dir="ltr" is-upgraded syntax="JSON"><code translate="no" dir="ltr"><span class="devsite-syntax-p">{</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nt">"success"</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-kc">true</span><span class="devsite-syntax-err">|</span><span class="devsite-syntax-kc">false</span><span class="devsite-syntax-p">,</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// whether this request was a valid reCAPTCHA token for your site</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nt">"score"</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-kc">nu</span><span class="devsite-syntax-err">mber</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// the score for this request (0.0 - 1.0)</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nt">"action"</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">s</span><span class="devsite-syntax-kc">tr</span><span class="devsite-syntax-err">i</span><span class="devsite-syntax-kc">n</span><span class="devsite-syntax-err">g</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// the action name for this request (important to verify)</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nt">"challenge_ts"</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-kc">t</span><span class="devsite-syntax-err">imes</span><span class="devsite-syntax-kc">ta</span><span class="devsite-syntax-err">mp</span><span class="devsite-syntax-p">,</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// timestamp of the challenge load (ISO format yyyy-MM-dd'T'HH:mm:ssZZ)</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nt">"hostname"</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-err">s</span><span class="devsite-syntax-kc">tr</span><span class="devsite-syntax-err">i</span><span class="devsite-syntax-kc">n</span><span class="devsite-syntax-err">g</span><span class="devsite-syntax-p">,</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// the hostname of the site where the reCAPTCHA was solved</span> <span class="devsite-syntax-w"> </span><span class="devsite-syntax-nt">"error-codes"</span><span class="devsite-syntax-p">:</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-p">[</span><span class="devsite-syntax-err">...</span><span class="devsite-syntax-p">]</span><span class="devsite-syntax-w"> </span><span class="devsite-syntax-c1">// optional</span> <span class="devsite-syntax-p">}</span> </code></pre></devsite-code> <h3 id="tips" data-text="Tips" tabindex="-1">Tips</h3> <ol> <li><code translate="no" dir="ltr">grecaptcha.ready()</code> runs your function when the reCAPTCHA library loads. To avoid race conditions with the <code translate="no" dir="ltr">api.js</code>, include the <code translate="no" dir="ltr">api.js</code> before your scripts that call grecaptcha, or continue to use the <a href="/recaptcha/docs/display#explicit_render">onload callback</a> that's defined with the v2 API.</li> <li>Try hooking the <code translate="no" dir="ltr">execute</code> call to interesting or sensitive actions like Register, Password Reset, Purchase, or Play.</li> <li>Use <code translate="no" dir="ltr">https://www.google.com/recaptcha/api.js?trustedtypes=true</code> to load code compatible with <a href="https://web.dev/trusted-types/">Trusted Types</a>.</li> </ol> </div> <devsite-recommendations display="in-page" hidden yield> </devsite-recommendations> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <devsite-recommendations id="recommendations-link" yield></devsite-recommendations> <div class="devsite-floating-action-buttons"> </div> </article> <devsite-content-footer class="nocontent"> <p>Except as otherwise noted, the content of this page is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 License</a>, and code samples are licensed under the <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>. 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