Learn R Programming

shiny

Easily build rich and productive interactive web apps in R — no HTML/CSS/JavaScript required.

Features

  • An intuitive and extensible reactive programming model which makes it easy to transform existing R code into a "live app" where outputs automatically react to new user input.
    • Compared to event-based programming, reactivity allows Shiny to do the minimum amount of work when input(s) change, and allows humans to more easily reason about complex MVC logic.
  • A prebuilt set of highly sophisticated, customizable, and easy-to-use widgets (e.g., plots, tables, sliders, dropdowns, date pickers, and more).
  • An attractive default look based on Bootstrap which can also be easily customized with the bslib package or avoided entirely with more direct R bindings to HTML/CSS/JavaScript.
  • Seamless integration with R Markdown, making it easy to embed numerous applications natively within a larger dynamic document.
  • Tools for improving and monitoring performance, including native support for async programming, caching, load testing, and more.
  • Modules: a framework for reducing code duplication and complexity.
  • An ability to bookmark application state and/or generate code to reproduce output(s).
  • A rich ecosystem of extension packages for more custom widgets, input validation, unit testing, and more.

Installation

To install the stable version from CRAN:

install.packages("shiny")

Getting Started

Once installed, load the library and run an example:

library(shiny)
# Launches an app, with the app's source code included
runExample("06_tabsets")
# Lists more prepackaged examples
runExample()

For more examples and inspiration, check out the Shiny User Gallery.

For help with learning fundamental Shiny programming concepts, check out the Mastering Shiny book and the Shiny Tutorial. The former is currently more up-to-date with modern Shiny features, whereas the latter takes a deeper, more visual, dive into fundamental concepts.

Join the conversation

If you want to chat about Shiny, meet other developers, or help us decide what to work on next, join us on Discord.

Getting Help

To ask a question about Shiny, please use the RStudio Community website.

For bug reports, please use the issue tracker and also keep in mind that by writing a good bug report, you're more likely to get help with your problem.

Contributing

We welcome contributions to the shiny package. Please see our CONTRIBUTING.md file for detailed guidelines of how to contribute.

License

The shiny package as a whole is licensed under the GPLv3. See the LICENSE file for more details.

R version support

Shiny is supported on the latest release version of R, as well as the previous four minor release versions of R. For example, if the latest release R version is 4.1, then that version is supported, as well as 4.0, 3.6, 3.5, and 3.4.

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Version

Install

install.packages('shiny')

Monthly Downloads

486,176

Version

1.11.1

License

GPL-3 | file LICENSE

Issues

820

Pull Requests

61

Stars

5,495

Forks

1,881

Maintainer

Winston Chang

Last Published

July 3rd, 2025

Functions in shiny (1.11.1)

clickOpts

Control interactive plot point events
busyIndicatorOptions

Customize busy indicator options
brushOpts

Create an object representing brushing options
callModule

Invoke a Shiny module
column

Create a column within a UI definition
brushedPoints

Find rows of data selected on an interactive plot.
checkboxInput

Checkbox Input Control
checkboxGroupInput

Checkbox Group Input Control
bootstrapLib

Bootstrap libraries
bootstrapPage

Create a Bootstrap page
dateRangeInput

Create date range input
createWebDependency

Create a web dependency
devmode

Shiny Developer Mode
downloadButton

Create a download button or link
domains

Reactive domains
conditionalPanel

Conditional Panel
createRenderFunction

Implement custom render functions
dateInput

Create date input
diskCache

Create disk cache (deprecated)
downloadHandler

File Downloads
enableBookmarking

Enable bookmarking for a Shiny application
fileInput

File Upload Control
fillPage

Create a page that fills the window
fillRow

Flex Box-based row/column layouts
fixedPage

Create a page with a fixed layout
debounce

Slow down a reactive expression with debounce/throttle
freezeReactiveVal

Freeze a reactive value
getCurrentTheme

Obtain Shiny's Bootstrap Sass theme
getQueryString

Get the query string / hash component from the URL
htmlOutput

Create an HTML output element
flowLayout

Flow layout
fluidPage

Create a page with fluid layout
getCurrentOutputInfo

Get output information
httpResponse

Create an HTTP response object
loadSupport

Load an app's supporting R files
makeReactiveBinding

Make a reactive variable
isolate

Create a non-reactive scope for an expression
moduleServer

Shiny modules
knitr_methods

Knitr S3 methods
insertTab

Dynamically insert/remove a tabPanel
insertUI

Insert and remove UI objects
navlistPanel

Create a navigation list panel
isTruthy

Truthy and falsy values
exportTestValues

Register expressions for export in test mode
isRunning

Check whether a Shiny application is running
inputPanel

Input panel
icon

Create an icon
exprToFunction

Convert an expression to a function
helpText

Create a help text element
markRenderFunction

Mark a function as a render function
invalidateLater

Scheduled Invalidation
markOutputAttrs

Mark a render function with attributes that will be used by the output
headerPanel

Create a header panel
navbarPage

Create a page with a top level navigation bar
is.reactivevalues

Checks whether an object is a reactivevalues object
markdown

Insert inline Markdown
maskReactiveContext

Evaluate an expression without a reactive context
observe

Create a reactive observer
onStop

Run code after an application or session ends
numericInput

Create a numeric input control
pageWithSidebar

Create a page with a sidebar
onBookmark

Add callbacks for Shiny session bookmarking events
radioButtons

Create radio buttons
plotPNG

Capture a plot as a PNG file.
onFlush

Add callbacks for Shiny session events
parseQueryString

Parse a GET query string from a URL
memoryCache

Create memory cache (deprecated)
modalDialog

Create a modal dialog UI
passwordInput

Create a password input control
outputOptions

Set options for an output object.
plotOutput

Create an plot or image output element
reactivePoll

Reactive polling
reactiveFileReader

Reactive file reader
reactive

Create a reactive expression
reactiveConsole

Activate reactivity in the console
reactiveValues

Create an object for storing reactive values
reactiveValuesToList

Convert a reactivevalues object to a list
observeEvent

Event handler
reactiveVal

Create a (single) reactive value
reactiveTimer

Timer
reactlog

Reactive Log Visualizer
registerThemeDependency

Register a theme dependency
reexports

Objects exported from other packages
registerInputHandler

Register an Input Handler
removeInputHandler

Deregister an Input Handler
renderCachedPlot

Plot output with cached images
runApp

Run Shiny Application
runGadget

Run a gadget
addResourcePath

Resource Publishing
repeatable

Make a random number generator repeatable
renderPrint

Text Output
renderPlot

Plot Output
dataTableOutput

Table output with the JavaScript DataTables library
runTests

Runs the tests associated with this Shiny app
restoreInput

Restore an input value
req

Check for required values
renderUI

UI Output
tableOutput

Table Output
renderImage

Image file output
setSerializer

Add a function for serializing an input before bookmarking application state
shiny-package

Web Application Framework for R
runUrl

Run a Shiny application from a URL
safeError

Declare an error safe for the user to see
showTab

Dynamically hide/show a tabPanel
showNotification

Show or remove a notification
showModal

Show or remove a modal dialog
serverInfo

Collect information about the Shiny Server environment
sidebarLayout

Layout a sidebar and main area
runExample

Run Shiny Example Applications
selectInput

Create a select list input control
shinyApp

Create a Shiny app object
getShinyOption

Get or set Shiny options
snapshotExclude

Mark an output to be excluded from test snapshots
setBookmarkExclude

Exclude inputs from bookmarking
shinyAppTemplate

Generate a Shiny application from a template
shinyDeprecated

Print message for deprecated functions in Shiny
session

Session object
showBookmarkUrlModal

Display a modal dialog for bookmarking
shinyUI

Create a Shiny UI handler
shiny.appobj

Shiny App object
shinyServer

Define Server Functionality
submitButton

Create a submit button
stacktrace

Stack trace manipulation functions
updateCheckboxInput

Change the value of a checkbox input on the client
updateDateInput

Change the value of a date input on the client
stopApp

Stop the currently running Shiny app
tabsetPanel

Create a tabset panel
snapshotPreprocessOutput

Add a function for preprocessing an output before taking a test snapshot
splitLayout

Split layout
updateCheckboxGroupInput

Change the value of a checkbox group input on the client
updateActionButton

Change the label or icon of an action button on the client
snapshotPreprocessInput

Add a function for preprocessing an input before taking a test snapshot
testServer

Reactive testing for Shiny server functions and modules
updateTabsetPanel

Change the selected tab on the client
textOutput

Create a text output element
sizeGrowthRatio

Create a sizing function that grows at a given ratio
sliderInput

Slider Input Widget
titlePanel

Create a panel containing an application title.
updateTextInput

Change the value of a text input on the client
urlModal

Generate a modal dialog that displays a URL
withMathJax

Load the MathJax library and typeset math expressions
updateRadioButtons

Change the value of a radio input on the client
updateQueryString

Update URL in browser's location bar
varSelectInput

Select variables from a data frame
tabPanel

Create a tab panel
updateNumericInput

Change the value of a number input on the client
withProgress

Reporting progress (functional API)
updateDateRangeInput

Change the start and end values of a date range input on the client
verticalLayout

Lay out UI elements vertically
updateTextAreaInput

Change the value of a textarea input on the client
wellPanel

Create a well panel
viewer

Viewer options
useBusyIndicators

Enable/disable busy indication
validate

Validate input values and other conditions
textInput

Create a text input control
textAreaInput

Create a textarea input control
updateSliderInput

Update Slider Input Widget
updateSelectInput

Change the value of a select input on the client
NS

Namespaced IDs for inputs/outputs
ExtendedTask

Task or computation that proceeds in the background
MockShinySession

Mock Shiny Session
bookmarkButton

Create a button for bookmarking/sharing
Progress

Reporting progress (object-oriented API)
absolutePanel

Panel with absolute positioning
bindEvent

Make an object respond only to specified reactive events
actionButton

Action button/link
bindCache

Add caching with reactivity to an object
applyInputHandlers

Apply input handlers to raw input values