{"id":169,"date":"2026-05-05T09:18:49","date_gmt":"2026-05-05T13:18:49","guid":{"rendered":"https:\/\/simpletool.io\/blog\/?p=169"},"modified":"2026-05-05T09:18:49","modified_gmt":"2026-05-05T13:18:49","slug":"react-native-shadow-generator","status":"publish","type":"post","link":"https:\/\/simpletool.io\/blog\/react-native-shadow-generator\/","title":{"rendered":"React Native Shadow Generator: iOS + Android [2026]"},"content":{"rendered":"<div class=\"ai-summary\" style=\"padding: 14px 18px; background: #f6f9fc; border-left: 4px solid #635BFF; border-radius: 8px; font-size: 15px; margin-bottom: 28px;\"><strong>TL;DR:<\/strong> React Native handles shadows with two completely different APIs depending on platform. <strong>iOS<\/strong> uses four properties: <code>shadowColor<\/code>, <code>shadowOffset<\/code>, <code>shadowOpacity<\/code>, <code>shadowRadius<\/code>. <strong>Android<\/strong> uses one \u2014 <code>elevation<\/code> \u2014 which renders a Material-Design-style shadow whose appearance you can&#8217;t fully control. Our <a href=\"https:\/\/simpletool.io\/tools\/react-native-shadow-generator\/\">free React Native shadow generator<\/a> shows both side by side, lets you tune iOS to match an Android elevation visually, and outputs a copy-paste StyleSheet block including the cross-platform Platform.OS guard.<\/div>\n<p>Shadows on a React Native card sound like one feature; they&#8217;re actually two implementations with no overlap. iOS reads the four <code>shadow*<\/code> props that map closely to Apple&#8217;s CALayer shadow API. Android ignores all four and reads <code>elevation<\/code> only \u2014 a 0\u201324 numeric value that the Material framework converts into a system-rendered shadow. Set both: iOS uses its props, Android uses elevation. Set only iOS-style props: Android is shadowless. Set only elevation: iOS is shadowless. Pretty much every &#8220;why does my shadow not show up?&#8221; Stack Overflow question is one of these three.<\/p>\n<p>Our <a href=\"https:\/\/simpletool.io\/tools\/react-native-shadow-generator\/\">React Native shadow generator<\/a> renders both platforms side-by-side with a live preview that approximates each platform&#8217;s rendering. You set the iOS values, see the Android equivalent under our preset mapping, and copy a single StyleSheet block that works on both. This guide covers the prop semantics, the iOS-vs-Android visual mismatches, and the gotchas with backgroundColor, borderRadius, and overflow.<\/p>\n<h2 class=\"wp-block-heading\">iOS shadow props vs Android elevation<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 12px 0 20px;\">\n<thead>\n<tr style=\"background: #0A2540; color: #fff;\">\n<th style=\"text-align: left; padding: 10px 14px;\">Property<\/th>\n<th style=\"text-align: left; padding: 10px 14px;\">Platform<\/th>\n<th style=\"text-align: left; padding: 10px 14px;\">Type<\/th>\n<th style=\"text-align: left; padding: 10px 14px;\">Default<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>shadowColor<\/code><\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">iOS only<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">colour<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>'black'<\/code><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>shadowOffset<\/code><\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">iOS only<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>{ width, height }<\/code><\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>{ width: 0, height: 0 }<\/code><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>shadowOpacity<\/code><\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">iOS only<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">number 0\u20131<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>0<\/code> (invisible)<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>shadowRadius<\/code><\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">iOS only<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\">number (px)<\/td>\n<td style=\"padding: 10px 14px; border-bottom: 1px solid #e7ecef;\"><code>3<\/code><\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 10px 14px;\"><code>elevation<\/code><\/td>\n<td style=\"padding: 10px 14px;\">Android only<\/td>\n<td style=\"padding: 10px 14px;\">number (0\u201324)<\/td>\n<td style=\"padding: 10px 14px;\"><code>0<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 class=\"wp-block-heading\">Mapping iOS values to Android elevation<\/h2>\n<p>Material Design&#8217;s elevation system is a fixed scale: 1 = subtle, 2 = card, 4 = button, 6 = dropdown, 8 = floating action button, 16 = navigation drawer, 24 = highest layer. There&#8217;s no Android API to fully customise the shadow \u2014 you pick a number and Android renders the matching Material shadow. Approximate iOS-to-Android mapping:<\/p>\n<ul class=\"wp-block-list\">\n<li>iOS subtle (offset 0\/2, opacity 0.1, radius 3) \u2248 <code>elevation: 2<\/code><\/li>\n<li>iOS soft card (offset 0\/4, opacity 0.15, radius 6) \u2248 <code>elevation: 4<\/code><\/li>\n<li>iOS prominent (offset 0\/6, opacity 0.2, radius 10) \u2248 <code>elevation: 8<\/code><\/li>\n<li>iOS dramatic (offset 0\/12, opacity 0.3, radius 16) \u2248 <code>elevation: 16<\/code><\/li>\n<\/ul>\n<p>Pixel-perfect parity isn&#8217;t possible \u2014 the platforms render shadows with different algorithms. Aim for visual equivalence at the design-system level: a &#8220;card&#8221; looks like a card on both platforms.<\/p>\n<h2 class=\"wp-block-heading\">How to generate a React Native shadow<\/h2>\n<ol class=\"wp-block-list\">\n<li>Open the <a href=\"https:\/\/simpletool.io\/tools\/react-native-shadow-generator\/\">React Native shadow generator<\/a><\/li>\n<li>Adjust the four iOS sliders: shadowColor, shadowOffset, shadowOpacity, shadowRadius<\/li>\n<li>The Android elevation slider tracks automatically (or override manually)<\/li>\n<li>Watch the side-by-side preview \u2014 iOS on the left, Android approximation on the right<\/li>\n<li>Click <strong>Copy StyleSheet<\/strong> for a complete cross-platform block<\/li>\n<\/ol>\n<h2 class=\"wp-block-heading\">Cross-platform StyleSheet pattern<\/h2>\n<p>The standard React Native shadow shim looks like this:<\/p>\n<pre style=\"background: #f6f9fc; border-left: 4px solid #635BFF; padding: 12px 16px; overflow-x: auto; font-size: 13px; line-height: 1.5; border-radius: 6px;\"><code>import { StyleSheet, Platform } from \"react-native\";\r\n\r\nconst styles = StyleSheet.create({\r\n  card: {\r\n    backgroundColor: \"white\",\r\n    borderRadius: 12,\r\n    padding: 16,\r\n    ...Platform.select({\r\n      ios: {\r\n        shadowColor: \"#000\",\r\n        shadowOffset: { width: 0, height: 4 },\r\n        shadowOpacity: 0.15,\r\n        shadowRadius: 8,\r\n      },\r\n      android: {\r\n        elevation: 4,\r\n      },\r\n    }),\r\n  },\r\n});<\/code><\/pre>\n<p>Note <code>backgroundColor<\/code> is required on Android for elevation to render \u2014 without it, Android won&#8217;t draw the shadow even though the prop is set. iOS doesn&#8217;t have this requirement.<\/p>\n<h2 class=\"wp-block-heading\">Common gotchas<\/h2>\n<ul class=\"wp-block-list\">\n<li><strong>Android elevation requires <code>backgroundColor<\/code>.<\/strong> A transparent or undefined background makes Android skip the shadow entirely. Always set a background colour for elevation to render.<\/li>\n<li><strong>iOS shadow doesn&#8217;t follow rounded corners by default.<\/strong> Set <code>shadowPath<\/code> via the older <code>shadowOffset<\/code> shape, or use the <code>react-native-svg-shadow<\/code> library if you need precision. Most cases are fine without.<\/li>\n<li><strong>Don&#8217;t use both elevation and iOS props on Android.<\/strong> elevation alone produces the Material shadow; adding iOS props doesn&#8217;t help and may break expected layouts in some RN versions.<\/li>\n<li><strong>shadowOpacity defaults to 0.<\/strong> If you set everything else but skip <code>shadowOpacity<\/code>, your iOS card has no shadow. The most common &#8220;shadow doesn&#8217;t show&#8221; cause on iOS.<\/li>\n<li><strong>overflow: hidden clips shadows on iOS.<\/strong> A card with <code>overflow: 'hidden'<\/code> (e.g., to clip an image to rounded corners) hides its own shadow. Wrap the clipped element in a parent that has the shadow, then put the clipped child inside.<\/li>\n<li><strong>Color names differ.<\/strong> iOS accepts CSS colour names; Android accepts standard names too but some hex strings render differently. Stick to hex (<code>'#000'<\/code>) for cross-platform consistency.<\/li>\n<li><strong>RN 0.71+ supports new architecture.<\/strong> The new (Fabric\/TurboModules) renderer respects shadow props more consistently across both platforms. Older versions (RN &lt;0.65) may need third-party libraries like <code>react-native-shadow-2<\/code> for visual parity.<\/li>\n<\/ul>\n<h2 class=\"wp-block-heading\">When NOT to use this tool<\/h2>\n<p>For complex shadows (multiple stacked shadows, inner shadows, coloured shadows beyond simple offsets), use a third-party library: <code>react-native-shadow-2<\/code> renders SVG-based shadows that look identical on both platforms. For text shadows, use the dedicated <code>textShadowColor<\/code>, <code>textShadowOffset<\/code>, <code>textShadowRadius<\/code> props (different from view shadows). For Web React Native (RN Web), neither shadow API works \u2014 use CSS <code>box-shadow<\/code> via <code>style.shadowOffset = ...<\/code> with platform check or a CSS-in-JS library.<\/p>\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n<h3 class=\"wp-block-heading\">Why doesn&#8217;t my shadow show on Android?<\/h3>\n<p>Three usual causes: (1) you set iOS props but no <code>elevation<\/code> \u2014 Android ignores iOS props; (2) you set <code>elevation<\/code> but the parent has no <code>backgroundColor<\/code> \u2014 Android needs an opaque background to render the shadow; (3) <code>overflow: 'hidden'<\/code> on the parent clips the shadow. Add <code>elevation<\/code>, set <code>backgroundColor<\/code>, remove <code>overflow: hidden<\/code>.<\/p>\n<h3 class=\"wp-block-heading\">Why doesn&#8217;t my shadow show on iOS?<\/h3>\n<p>Almost always <code>shadowOpacity<\/code> is 0 (the default). Set it to 0.1\u20130.3. Other causes: <code>shadowColor<\/code> is transparent, parent has <code>overflow: 'hidden'<\/code>, or the view has no <code>backgroundColor<\/code> (transparent views can&#8217;t cast shadows on iOS either, though it&#8217;s less strict than Android).<\/p>\n<h3 class=\"wp-block-heading\">Can I have a coloured shadow?<\/h3>\n<p>iOS yes \u2014 set <code>shadowColor: '#FF0000'<\/code>. Android no \u2014 <code>elevation<\/code> always renders the system Material shadow which is roughly black with system-controlled opacity. For coloured shadows on Android, use <code>react-native-shadow-2<\/code> or render a manual SVG shadow.<\/p>\n<h3 class=\"wp-block-heading\">Does this work on Expo and bare React Native?<\/h3>\n<p>Yes. Both shadow APIs are part of core React Native; they work identically in Expo and bare projects. No native modules required.<\/p>\n<h3 class=\"wp-block-heading\">What&#8217;s the difference between elevation and zIndex?<\/h3>\n<p>elevation controls visual shadow depth on Android. zIndex controls render order (which view appears in front). They&#8217;re independent \u2014 a high-elevation card with low zIndex still appears behind other views. Set both together when you want an elevated card to also be on top.<\/p>\n<h3 class=\"wp-block-heading\">Is my data uploaded?<\/h3>\n<p>No. The generator runs in your browser. The shadow values, preview, and exported StyleSheet stay on your device.<\/p>\n<h2 class=\"wp-block-heading\">Related tools and guides<\/h2>\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/simpletool.io\/tools\/react-native-shadow-generator\/\">React Native Shadow Generator<\/a><\/li>\n<li><a href=\"https:\/\/simpletool.io\/tools\/css-box-shadow-generator\/\">CSS Box Shadow Generator (web)<\/a><\/li>\n<li><a href=\"https:\/\/simpletool.io\/tools\/css-border-radius-generator\/\">CSS Border Radius Generator<\/a><\/li>\n<li><a href=\"https:\/\/simpletool.io\/tools\/javascript-formatter\/\">JavaScript Formatter<\/a><\/li>\n<li><a href=\"https:\/\/simpletool.io\/coding-tools\/\">All coding tools<\/a><\/li>\n<\/ul>\n<p><script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Why doesn't my shadow show on Android?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Three causes: (1) iOS props but no elevation; (2) no backgroundColor on the view; (3) overflow hidden on the parent. 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Both shadow APIs are core React Native \u2014 work identically in Expo and bare projects.\"}},\n{\"@type\":\"Question\",\"name\":\"What's the difference between elevation and zIndex?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"elevation = visual shadow depth on Android. zIndex = render order. Independent \u2014 set both for elevated cards that are also on top.\"}},\n{\"@type\":\"Question\",\"name\":\"Is my data uploaded?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Runs in your browser. Shadow values, preview, exported StyleSheet stay on your device.\"}}\n]}<\/script><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Generate React Native shadows for iOS and Android side-by-side. shadowColor, shadowOffset, shadowOpacity, shadowRadius + matching elevation. Live preview.<\/p>\n","protected":false},"author":2,"featured_media":168,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60,6],"tags":[61,91,90],"class_list":["post-169","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coding-tools","category-tutorials","tag-coding-tools","tag-mobile","tag-react-native"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>React Native Shadow Generator: iOS + Android [2026]<\/title>\n<meta name=\"description\" content=\"Generate React Native shadows for iOS and Android side-by-side. shadowColor, shadowOffset, shadowOpacity, shadowRadius + matching elevation. 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