{"id":71,"date":"2026-08-27T20:00:58","date_gmt":"2026-08-27T20:00:58","guid":{"rendered":"http:\/\/ucdreams-tools.local\/code-runner\/"},"modified":"2026-10-08T22:51:10","modified_gmt":"2026-10-08T22:51:10","slug":"code-runner","status":"publish","type":"page","link":"https:\/\/ucdreams.com\/tools\/code-runner\/","title":{"rendered":"CodeRunner"},"content":{"rendered":"<section class=\"wp-block-group tools-hero tool-hero is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:70px;padding-bottom:30px\">\n<p class=\"has-text-align-center section-kicker wp-block-paragraph\">Developer Tools<\/p>\n<h1 class=\"wp-block-heading has-text-align-center hero-title\">CodeRunner<\/h1>\n<p class=\"has-text-align-center hero-descr wp-block-paragraph\">A CodePen-style playground \u2014 write HTML, CSS &amp; JavaScript with syntax highlighting and see the result instantly. Console included, autosave on, export standalone .html. Everything runs on your device.<\/p>\n<\/section>\n<section class=\"wp-block-group tool-area codearea is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:16px;padding-bottom:60px\">\n<div class=\"cr-app\" id=\"cr-app\">\n<div class=\"cr-toolbar\">\n<div class=\"cr-group\"><span class=\"cr-logo\"><svg width=\"18\" height=\"18\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"16 18 22 12 16 6\"><\/polyline><polyline points=\"8 6 2 12 8 18\"><\/polyline><\/svg><\/span><span class=\"cr-title\">CodeRunner<\/span><\/div>\n<div class=\"cr-group\"><button type=\"button\" class=\"cr-btn cr-run\" id=\"cr-run\" title=\"Run (Ctrl+Enter)\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"currentColor\" stroke=\"none\" style=\"vertical-align:middle;margin-right:4px;\"><polygon points=\"5 3 19 12 5 21 5 3\"><\/polygon><\/svg> Run<\/button><label class=\"cr-toggle\" title=\"Auto-run as you type\"><input type=\"checkbox\" id=\"cr-autorun\" checked \/> <span>Auto<\/span><\/label><\/div>\n<div class=\"cr-group cr-tabs\" id=\"cr-tabs\"><button type=\"button\" class=\"cr-tab active\" data-pane=\"html\">HTML<\/button><button type=\"button\" class=\"cr-tab\" data-pane=\"css\">CSS<\/button><button type=\"button\" class=\"cr-tab\" data-pane=\"js\">JS<\/button><button type=\"button\" class=\"cr-tab\" data-pane=\"console\">Console <span class=\"cr-badge\" id=\"cr-con-badge\" hidden>0<\/span><\/button><\/div>\n<p><span class=\"cr-flex\"><\/span><\/p>\n<div class=\"cr-group\"><select id=\"cr-layout\" class=\"cr-select\" title=\"Layout\"><option value=\"split\" selected>Split View<\/option><option value=\"code\">Code Only<\/option><option value=\"preview\">Preview Only<\/option><\/select><select id=\"cr-examples\" class=\"cr-select\" title=\"Load example\"><option value=\"\">Examples\u2026<\/option><option value=\"starter\">Starter \u2014 button demo<\/option><option value=\"canvas\">Canvas animation<\/option><option value=\"console\">Console demo<\/option><\/select><button type=\"button\" class=\"cr-btn\" id=\"cr-save\" title=\"Download standalone .html (Ctrl+S)\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"vertical-align:middle;margin-right:4px;\"><path d=\"M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4\"><\/path><polyline points=\"7 10 12 15 17 10\"><\/polyline><line x1=\"12\" y1=\"15\" x2=\"12\" y2=\"3\"><\/line><\/svg> .html<\/button><button type=\"button\" class=\"cr-btn\" id=\"cr-open\" title=\"Open .html file\"><svg width=\"15\" height=\"15\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"vertical-align:middle;\"><path d=\"M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z\"><\/path><\/svg><\/button><input type=\"file\" id=\"cr-open-input\" accept=\".html,.htm,.txt\" hidden \/><button type=\"button\" class=\"cr-btn\" id=\"cr-reset\" title=\"Reset to starter\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"vertical-align:middle;\"><polyline points=\"1 4 1 10 7 10\"><\/polyline><path d=\"M3.51 15a9 9 0 1 0 2.13-9.36L1 10\"><\/path><\/svg><\/button><\/div>\n<\/div>\n<div class=\"cr-main\" id=\"cr-main\">\n<div class=\"cr-editors\" id=\"cr-editors\">\n<div class=\"cr-pane\" data-pane=\"html\">\n<div class=\"cr-editor\" id=\"cr-ed-html\"><\/div>\n<\/div>\n<div class=\"cr-pane\" data-pane=\"css\" hidden>\n<div class=\"cr-editor\" id=\"cr-ed-css\"><\/div>\n<\/div>\n<div class=\"cr-pane\" data-pane=\"js\" hidden>\n<div class=\"cr-editor\" id=\"cr-ed-js\"><\/div>\n<\/div>\n<div class=\"cr-pane\" data-pane=\"console\" hidden>\n<div class=\"cr-con-head\"><span>Console output<\/span><button type=\"button\" class=\"cr-btn\" id=\"cr-con-clear\">Clear<\/button><\/div>\n<div class=\"cr-console\" id=\"cr-con\"><\/div>\n<\/div>\n<\/div>\n<div class=\"cr-preview-col\" id=\"cr-preview-col\">\n<div class=\"cr-prev-head\"><span>Result<\/span><iframe id=\"cr-frame\" sandbox=\"allow-scripts allow-modals allow-popups allow-forms\" title=\"Preview\"><\/iframe><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"wp-block-group seo-content-section is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"seo-header-block\">\n<p class=\"section-kicker\">CODE PLAYGROUND<\/p>\n<h2 class=\"section-heading\">Why Choose UCDreams CodeRunner?<\/h2>\n<p class=\"seo-section-subtitle\">Run, test, and debug HTML, CSS, and JavaScript real-time<\/p>\n<\/p>\n<\/div>\n<div class=\"seo-features-grid\">\n<div class=\"seo-feature-card\">\n<div class=\"seo-feature-icon\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polygon points=\"13 2 3 14 12 14 11 22 21 10 12 10 13 2\"><\/polygon><\/svg><\/div>\n<h3 class=\"seo-feature-title\">Lightning Fast<\/h3>\n<p class=\"seo-feature-desc\">Powered by modern browser WebAssembly &#038; HTML5. Instant processing with zero queue times.<\/p>\n<\/p>\n<\/div>\n<div class=\"seo-feature-card\">\n<div class=\"seo-feature-icon\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"3\" y=\"11\" width=\"18\" height=\"11\" rx=\"2\" ry=\"2\"><\/rect><path d=\"M7 11V7a5 5 0 0 1 10 0v4\"><\/path><\/svg><\/div>\n<h3 class=\"seo-feature-title\">100% Private &#038; Secure<\/h3>\n<p class=\"seo-feature-desc\">Your files never leave your device. All calculations run locally in your browser memory.<\/p>\n<\/p>\n<\/div>\n<div class=\"seo-feature-card\">\n<div class=\"seo-feature-icon\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M18.178 8c5.096 0 5.096 8 0 8-2.548 0-4.077-4-6.178-4s-3.63 4-6.178 4c-5.096 0-5.096-8 0-8 2.548 0 4.077 4 6.178 4s3.63-4 6.178-4z\"><\/path><\/svg><\/div>\n<h3 class=\"seo-feature-title\">Free &#038; Unlimited<\/h3>\n<p class=\"seo-feature-desc\">No registration, no daily limits, no hidden fees, and zero forced watermarks on exports.<\/p>\n<\/p>\n<\/div>\n<div class=\"seo-feature-card\">\n<div class=\"seo-feature-icon\"><svg width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"5\" y=\"2\" width=\"14\" height=\"20\" rx=\"2\" ry=\"2\"><\/rect><line x1=\"12\" y1=\"18\" x2=\"12.01\" y2=\"18\"><\/line><\/svg><\/div>\n<h3 class=\"seo-feature-title\">Works Everywhere<\/h3>\n<p class=\"seo-feature-desc\">Fully responsive on desktop, laptop, iPhone, Android, and tablets on all modern browsers.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"seo-header-block\">\n<p class=\"section-kicker\">3 EASY STEPS<\/p>\n<h2 class=\"section-heading\">How to Test Code Online<\/h2>\n<\/p>\n<\/div>\n<div class=\"seo-steps-wrap\">\n<div class=\"seo-step-card\">\n            <span class=\"seo-step-number\">01<\/span><\/p>\n<h3 class=\"seo-step-title\">Select or Drop File<\/h3>\n<p class=\"seo-step-desc\">Write or paste your HTML, CSS, and JavaScript code.<\/p>\n<\/p>\n<\/div>\n<div class=\"seo-step-card\">\n            <span class=\"seo-step-number\">02<\/span><\/p>\n<h3 class=\"seo-step-title\">Process Online<\/h3>\n<p class=\"seo-step-desc\">View real-time rendering in the live preview window.<\/p>\n<\/p>\n<\/div>\n<div class=\"seo-step-card\">\n            <span class=\"seo-step-number\">03<\/span><\/p>\n<h3 class=\"seo-step-title\">Download Result<\/h3>\n<p class=\"seo-step-desc\">Debug code, inspect console logs, or export your snippet.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<div class=\"seo-header-block\">\n<p class=\"section-kicker\">FAQ<\/p>\n<h2 class=\"section-heading\">Frequently Asked Questions<\/h2>\n<\/p>\n<\/div>\n<div class=\"seo-faq-list\">\n<details class=\"seo-faq-item\">\n<summary class=\"seo-faq-summary\">Is CodeRunner safe for testing web code?<\/summary>\n<div class=\"seo-faq-body\">Yes! Code runs inside a sandboxed iframe directly in your browser.<\/div>\n<\/details>\n<\/div>\n<\/section>\n<section class=\"wp-block-group tools-area related-area is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:20px;padding-bottom:80px\">\n<p class=\"section-kicker wp-block-paragraph\">Developer Tools<\/p>\n<h2 class=\"wp-block-heading section-heading\">More Developer Tools<\/h2>\n<div class=\"wp-block-group tools-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\"><path d=\"M16 18l6-6-6-6\"><\/path><path d=\"M8 6l-6 6 6 6\"><\/path><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/code-runner\/\">CodeRunner<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Dev<\/p>\n<p class=\"tool-descr wp-block-paragraph\">CodePen-style HTML\/CSS\/JS playground with live preview and console.<\/p>\n<\/p>\n<\/div>\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\"><rect x=\"3\" y=\"3\" width=\"18\" height=\"18\" rx=\"2\"><\/rect><path d=\"M3 9h18\"><\/path><circle cx=\"8\" cy=\"14\" r=\"2\"><\/circle><path d=\"M14 16l3-3 4 4\"><\/path><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/artboard\/\">Artboard<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Design<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Figma-style design editor \u2014 frames, shapes, layers, export.<\/p>\n<\/p>\n<\/div>\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\"><rect x=\"3\" y=\"3\" width=\"18\" height=\"18\" rx=\"2\"><\/rect><path d=\"M8 12h8\"><\/path><path d=\"M12 8v8\"><\/path><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/pdf-editor\/\">PDF Editor<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">PDF<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Edit text, images and pages right inside your PDF.<\/p>\n<\/p>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Developer Tools CodeRunner A CodePen-style playground \u2014 write HTML, CSS &amp; JavaScript with syntax highlighting and see the result instantly. Console included, autosave on, export standalone .html. Everything runs on your device. CodeRunner Run Auto HTMLCSSJSConsole 0 Split ViewCode OnlyPreview OnlyExamples\u2026Starter \u2014 button demoCanvas animationConsole demo .html Console outputClear Result CODE PLAYGROUND Why Choose UCDreams [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"rank_math_title":"Free CodeRunner \u2014 Online HTML, CSS & JS Playground | UCDreams","rank_math_description":"Run, test, and debug HTML, CSS, and JavaScript code real-time in your browser. 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