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reCAPTCHA | Google for Developers
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type="application/opensearchdescription+xml" title="Google for Developers" href="https://developers.google.com/s/opensearch.xml"> <title>reCAPTCHA | Google for Developers</title> <meta property="og:title" content="reCAPTCHA | Google for Developers"><meta name="description" content="Protect your site from spam and abuse."> <meta property="og:description" content="Protect your site from spam and abuse."><meta property="og:url" content="https://developers.google.com/recaptcha"><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"> <link rel="stylesheet" href="/extras.css"></head> <body class="" template="landing" theme="google-blue" type="product" layout="full" 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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" > <h1 class="devsite-product-name">reCAPTCHA</h1> </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 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class="devsite-collapsible-section "> <div class="devsite-header-background"> <div class="devsite-product-id-row" > <div class="devsite-product-description-row"> <div class="devsite-product-description"> Protect your site from spam and abuse. </div> </div> <div class="devsite-product-button-row"> <a href="https://developers.google.com/recaptcha/intro" class="button " >Learn more</a> </div> </div> <div class="devsite-doc-set-nav-row"> <devsite-tabs class="lower-tabs"> <nav class="devsite-tabs-wrapper" aria-label="Lower tabs"> <tab class="devsite-active"> <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" aria-label="Home, selected" data-category="Site-Wide Custom Events" data-label="Tab: Home" track-name="home" > Home </a> </tab> <tab > <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" 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 hidden> <div class="devsite-book-nav-filter" hidden> <span class="filter-list-icon material-icons" aria-hidden="true"></span> <input 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<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 devsite-nav-active" 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 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material-icons" data-icon="forward" > </span> </a> </li> </ul> </div> </div> </nav> </devsite-book-nav> <section id="gc-wrapper"> <main role="main" class="devsite-main-content" > <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> </ul> </div> <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> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded disabled> </devsite-toc> <div class="devsite-article-body clearfix devsite-no-page-title"> <section class="devsite-landing-row devsite-landing-row-1-up" header-position="top" > <div class="devsite-landing-row-inner"> <header class="devsite-landing-row-header" > <div class="devsite-landing-row-header-text"> <h2 id="what-is-recaptcha" data-text="What is reCAPTCHA?" tabindex="0"> What is reCAPTCHA? </h2> </div> </header> <div class="devsite-landing-row-group"> <div class="devsite-landing-row-item" description-position="bottom" > <div class="devsite-landing-row-item-media "> <figure class="devsite-landing-row-item-image"> <a href="https://developers.google.com/recaptcha/intro"> <picture> <img alt="" src="https://developers.google.com/static/recaptcha/images/newCaptchaAnchor.gif" srcset="https://developers.google.com/static/recaptcha/images/newCaptchaAnchor.gif" sizes="(max-width: 840px) 100vw, 952px" fetchpriority="high"> </picture> </a> </figure> </div> <div class="devsite-landing-row-item-description" > <div class="devsite-landing-row-item-body"> <h3 id="easy-to-add-advanced-security" data-text="Easy to add, advanced security" class="hide-from-toc no-link" tabindex="0"> <a href="https://developers.google.com/recaptcha/intro"> Easy to add, advanced security </a> </h3> <div class="devsite-landing-row-item-description-content"> reCAPTCHA is a free service that protects your site from spam and abuse. It uses advanced risk analysis techniques to tell humans and bots apart. </div> <div class="devsite-landing-row-item-buttons"> <a href="https://developers.google.com/recaptcha/intro" class="button button-primary " >Get started</a> </div> </div> </div> </div> </div> </div> </section> <section class="devsite-landing-row devsite-landing-row-1-up" header-position="top" > <div class="devsite-landing-row-inner"> <div class="devsite-landing-row-group"> <div class="devsite-landing-row-item" description-position="bottom" > <div class="devsite-landing-row-item-media devsite-landing-row-item-media-left "> <devsite-video autohide="1" showinfo="0" video-id="tbvxFW4UJdU" ></devsite-video> </div> <div class="devsite-landing-row-item-description" > <div class="devsite-landing-row-item-body"> <h3 id="introducing-recaptcha-v3" data-text="Introducing reCAPTCHA v3" class="hide-from-toc no-link" tabindex="0"> Introducing reCAPTCHA v3 </h3> <div class="devsite-landing-row-item-description-content"> reCAPTCHA v3 helps you detect abusive traffic on your website without user interaction. 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