SootSim

React Native in the browser

No Mac, no XCode, no Simulator, no problem. A 100% client-side, browser iOS simulator + React Native runtime. Zero dependencies, yet hundreds of native libraries.

Download for macOS Browser

npx sootbean

Open an app, then dev tools inspect!

Introducing

SootOS

A clean-room iOS implementation in CanvasKit. 120fps with low CPU usage in browser.

Canvas RenderingCanvasKit (Skia) renders every pixel — not a CSS approximation.

Touch & GestureMulti-touch, gesture handler, iOS scroll physics with rubber banding.

ReanimatedShared values, spring, timing, interpolation — 60fps on the UI thread.

System UIDark mode, status bar, dynamic island, safe area, home indicator.

Canvas Rendering

SootSimL uses the same rendering engine as Flutter. Shadows, blurs, corner radii, gradients — all rendered to canvas at native fidelity. No DOM elements, no CSS hacks.

CanvasKit (Skia) renders every pixel — not a CSS approximation.

Touch & Gesture

Full gesture responder system. Pan, pinch, tap, long-press, swipe-to-delete. Scroll momentum with iOS deceleration curves and rubber band at edges.

Multi-touch, gesture handler, iOS scroll physics with rubber banding.

Reanimated

Complete react-native-reanimated support. Shared values drive animations directly on the render thread. No bridge, no serialization, just smooth 60fps.

Shared values, spring, timing, interpolation — 60fps on the UI thread.

System UI

Full iOS system chrome. Toggle dark/light mode. StatusBar, SafeAreaView, Dynamic Island — all faithfully reproduced.

Dark mode, status bar, dynamic island, safe area, home indicator.

Massive Compatibility

195+ verified native libraries.

Native

@bitdrift/react-native

@bsky.app/react-native-mmkv

@callstack/react-native-bottom-tabs

@clerk/clerk-expo

@datadog/mobile-react-native

@expo/ui

@gorhom/bottom-sheet

@invertase/react-native-apple-authentication

@mattermost/react-native-paste-input

@miblanchard/react-native-slider

@mozzius/expo-dynamic-app-icon

@notifee/react-native

@react-native-async-storage/async-storage

@react-native-camera-roll/camera-roll

@react-native-clipboard/clipboard

@react-native-community/blur

@react-native-community/checkbox

@react-native-community/datetimepicker

@react-native-community/geolocation

@react-native-community/netinfo

@react-native-community/slider

@react-native-firebase/analytics

@react-native-firebase/app

@react-native-firebase/messaging

@react-native-google-signin/google-signin

@react-native-masked-view/masked-view

@react-native-menu/menu

@react-native-picker/picker

@segment/analytics-react-native

@sentry/react-native

@shopify/flash-list

@shopify/react-native-skia

@stripe/stripe-react-native

burnt

expo

expo-application

expo-audio

expo-auth-session

expo-av

expo-background-task

expo-blur

expo-calendar

expo-camera

expo-clipboard

expo-constants

expo-contacts

expo-crypto

expo-device

expo-document-picker

expo-file-system

expo-font

expo-glass-effect

expo-haptics

expo-image

expo-image-manipulator

expo-image-picker

expo-insights

expo-intent-launcher

expo-keep-awake

expo-linear-gradient

expo-linking

expo-liquid-glass-view

expo-local-authentication

expo-localization

expo-location

expo-media-library

expo-mesh-gradient

expo-modules-core

expo-navigation-bar

expo-notifications

expo-print

expo-screen-orientation

expo-secure-store

expo-sensors

expo-sharing

expo-sms

expo-splash-screen

expo-sqlite

expo-status-bar

expo-store-review

expo-system-ui

expo-task-manager

expo-tracking-transparency

expo-updates

expo-video

expo-video-thumbnails

expo-web-browser

lottie-react-native

posthog-react-native

react-native-adjust

react-native-aes-crypto

react-native-amplitude-analytics

react-native-app-auth

react-native-appsflyer

react-native-background-timer

react-native-biometrics

react-native-blob-util

react-native-bootsplash

react-native-bottom-tabs

react-native-branch

react-native-code-push

react-native-compressor

react-native-config

react-native-contacts

react-native-date-picker

react-native-device-attest

react-native-device-info

react-native-document-picker

react-native-exception-handler

react-native-fast-image

react-native-fbsdk-next

react-native-fs

react-native-gesture-handler

react-native-get-random-values

react-native-haptic-feedback

react-native-iap

react-native-image-crop-picker

react-native-image-picker

react-native-in-app-review

react-native-inappbrowser-reborn

react-native-ios-context-menu

react-native-ios-utilities

react-native-keyboard-controller

react-native-keychain

react-native-launch-arguments

react-native-linear-gradient

react-native-localize

react-native-maps

react-native-mixpanel

react-native-mmkv

react-native-nitro-cookies

react-native-nitro-modules

react-native-onesignal

react-native-orientation-locker

react-native-pager-view

react-native-pdf

react-native-performance

react-native-permissions

react-native-purchases

react-native-pure-jwt

react-native-push-notification

react-native-quick-base64

react-native-reanimated

react-native-restart

react-native-safe-area-context

react-native-screen-transitions

react-native-screens

react-native-share

react-native-simple-toast

react-native-splash-screen

react-native-svg

react-native-teleport

react-native-uitextview

react-native-vector-icons

react-native-video

react-native-view-shot

react-native-vision-camera

react-native-webview

react-native-wheel-pick

react-native-worklets

react-native-zip-archive

@bitdrift/react-native

@bsky.app/react-native-mmkv

@callstack/react-native-bottom-tabs

@clerk/clerk-expo

@datadog/mobile-react-native

@expo/ui

@gorhom/bottom-sheet

@invertase/react-native-apple-authentication

@mattermost/react-native-paste-input

@miblanchard/react-native-slider

@mozzius/expo-dynamic-app-icon

@notifee/react-native

@react-native-async-storage/async-storage

@react-native-camera-roll/camera-roll

@react-native-clipboard/clipboard

@react-native-community/blur

@react-native-community/checkbox

@react-native-community/datetimepicker

@react-native-community/geolocation

@react-native-community/netinfo

@react-native-community/slider

@react-native-firebase/analytics

@react-native-firebase/app

@react-native-firebase/messaging

@react-native-google-signin/google-signin

@react-native-masked-view/masked-view

@react-native-menu/menu

@react-native-picker/picker

@segment/analytics-react-native

@sentry/react-native

@shopify/flash-list

@shopify/react-native-skia

@stripe/stripe-react-native

burnt

expo

expo-application

expo-audio

expo-auth-session

expo-av

expo-background-task

expo-blur

expo-calendar

expo-camera

expo-clipboard

expo-constants

expo-contacts

expo-crypto

expo-device

expo-document-picker

expo-file-system

expo-font

expo-glass-effect

expo-haptics

expo-image

expo-image-manipulator

expo-image-picker

expo-insights

expo-intent-launcher

expo-keep-awake

expo-linear-gradient

expo-linking

expo-liquid-glass-view

expo-local-authentication

expo-localization

expo-location

expo-media-library

expo-mesh-gradient

expo-modules-core

expo-navigation-bar

expo-notifications

expo-print

expo-screen-orientation

expo-secure-store

expo-sensors

expo-sharing

expo-sms

expo-splash-screen

expo-sqlite

expo-status-bar

expo-store-review

expo-system-ui

expo-task-manager

expo-tracking-transparency

expo-updates

expo-video

expo-video-thumbnails

expo-web-browser

lottie-react-native

posthog-react-native

react-native-adjust

react-native-aes-crypto

react-native-amplitude-analytics

react-native-app-auth

react-native-appsflyer

react-native-background-timer

react-native-biometrics

react-native-blob-util

react-native-bootsplash

react-native-bottom-tabs

react-native-branch

react-native-code-push

react-native-compressor

react-native-config

react-native-contacts

react-native-date-picker

react-native-device-attest

react-native-device-info

react-native-document-picker

react-native-exception-handler

react-native-fast-image

react-native-fbsdk-next

react-native-fs

react-native-gesture-handler

react-native-get-random-values

react-native-haptic-feedback

react-native-iap

react-native-image-crop-picker

react-native-image-picker

react-native-in-app-review

react-native-inappbrowser-reborn

react-native-ios-context-menu

react-native-ios-utilities

react-native-keyboard-controller

react-native-keychain

react-native-launch-arguments

react-native-linear-gradient

react-native-localize

react-native-maps

react-native-mixpanel

react-native-mmkv

react-native-nitro-cookies

react-native-nitro-modules

react-native-onesignal

react-native-orientation-locker

react-native-pager-view

react-native-pdf

react-native-performance

react-native-permissions

react-native-purchases

react-native-pure-jwt

react-native-push-notification

react-native-quick-base64

react-native-reanimated

react-native-restart

react-native-safe-area-context

react-native-screen-transitions

react-native-screens

react-native-share

react-native-simple-toast

react-native-splash-screen

react-native-svg

react-native-teleport

react-native-uitextview

react-native-vector-icons

react-native-video

react-native-view-shot

react-native-vision-camera

react-native-webview

react-native-wheel-pick

react-native-worklets

react-native-zip-archive

Verified

@floating-ui/react-native

@gorhom/portal

@legendapp/list

@react-native-vector-icons/fontawesome6-pro

moti

react-native-animatable

react-native-calendars

react-native-collapsible

react-native-confirmation-code-field

react-native-country-picker-modal

react-native-draggable-flatlist

react-native-drawer-layout

react-native-dropdown-picker

react-native-email-link

react-native-gifted-chat

react-native-image-zoom-viewer

react-native-logs

react-native-markdown-display

react-native-modal

react-native-paper

react-native-progress

react-native-qrcode-svg

react-native-render-html

react-native-select-dropdown

react-native-size-matters

react-native-step-indicator

react-native-swiper

react-native-switch

react-native-tab-view

react-native-toast-message

solito

@floating-ui/react-native

@gorhom/portal

@legendapp/list

@react-native-vector-icons/fontawesome6-pro

moti

react-native-animatable

react-native-calendars

react-native-collapsible

react-native-confirmation-code-field

react-native-country-picker-modal

react-native-draggable-flatlist

react-native-drawer-layout

react-native-dropdown-picker

react-native-email-link

react-native-gifted-chat

react-native-image-zoom-viewer

react-native-logs

react-native-markdown-display

react-native-modal

react-native-paper

react-native-progress

react-native-qrcode-svg

react-native-render-html

react-native-select-dropdown

react-native-size-matters

react-native-step-indicator

react-native-swiper

react-native-switch

react-native-tab-view

react-native-toast-message

solito

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