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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 MIT License. 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 4.3, then that version is supported, as well as 4.2, 4.1, 4.0, 3.6.

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Version

Install

install.packages('shiny')

Monthly Downloads

673,481

Version

1.13.0

License

MIT + file LICENSE

Issues

805

Pull Requests

69

Stars

5,608

Forks

1,885

Maintainer

Carson Sievert

Last Published

February 20th, 2026

Functions in shiny (1.13.0)

checkboxInput

Checkbox Input Control
busyIndicatorOptions

Customize busy indicator options
brushedPoints

Find rows of data selected on an interactive plot.
column

Create a column within a UI definition
clickOpts

Control interactive plot point events
bootstrapPage

Create a Bootstrap page
bootstrapLib

Bootstrap libraries
checkboxGroupInput

Checkbox Group Input Control
brushOpts

Create an object representing brushing options
callModule

Invoke a Shiny module
dateRangeInput

Create date range input
createWebDependency

Create a web dependency
debounce

Slow down a reactive expression with debounce/throttle
conditionalPanel

Conditional Panel
dateInput

Create date input
devmode

Shiny Developer Mode
downloadButton

Create a download button or link
domains

Reactive domains
createRenderFunction

Implement custom render functions
diskCache

Create disk cache (deprecated)
fileInput

File Upload Control
fillRow

Flex Box-based row/column layouts
flowLayout

Flow layout
fluidPage

Create a page with fluid layout
fixedPage

Create a page with a fixed layout
exportTestValues

Register expressions for export in test mode
downloadHandler

File Downloads
enableBookmarking

Enable bookmarking for a Shiny application
exprToFunction

Convert an expression to a function
helpText

Create a help text element
icon

Create an icon
getQueryString

Get the query string / hash component from the URL
inputPanel

Input panel
fillPage

Create a page that fills the window
freezeReactiveVal

Freeze a reactive value
htmlOutput

Create an HTML output element
httpResponse

Create an HTTP response object
getCurrentTheme

Obtain Shiny's Bootstrap Sass theme
getCurrentOutputInfo

Get output information
headerPanel

Create a header panel
invalidateLater

Scheduled Invalidation
makeReactiveBinding

Make a reactive variable
insertTab

Dynamically insert/remove a tabPanel
insertUI

Insert and remove UI objects
is.reactivevalues

Checks whether an object is a reactivevalues object
isTruthy

Truthy and falsy values
loadSupport

Load an app's supporting R files
isRunning

Check whether a Shiny application is running
isolate

Create a non-reactive scope for an expression
knitr_methods

Knitr S3 methods
memoryCache

Create memory cache (deprecated)
markRenderFunction

Mark a function as a render function
maskReactiveContext

Evaluate an expression without a reactive context
modalDialog

Create a modal dialog UI
navlistPanel

Create a navigation list panel
numericInput

Create a numeric input control
moduleServer

Shiny modules
markdown

Insert inline Markdown
navbarPage

Create a page with a top level navigation bar
markOutputAttrs

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

Run code after an application or session ends
passwordInput

Create a password input control
parseQueryString

Parse a GET query string from a URL
outputOptions

Set options for an output object.
onFlush

Add callbacks for Shiny session events
pageWithSidebar

Create a page with a sidebar
plotOutput

Create an plot or image output element
onBookmark

Add callbacks for Shiny session bookmarking events
observeEvent

Event handler
observe

Create a reactive observer
reactiveValues

Create an object for storing reactive values
plotPNG

Capture a plot as a PNG file.
reactiveConsole

Activate reactivity in the console
reactiveValuesToList

Convert a reactivevalues object to a list
reactiveFileReader

Reactive file reader
radioButtons

Create radio buttons
reactiveVal

Create a (single) reactive value
reactiveTimer

Timer
reactive

Create a reactive expression
reactivePoll

Reactive polling
reactlog

Reactive Log Visualizer
registerInputHandler

Register an Input Handler
dataTableOutput

Table output with the JavaScript DataTables library
renderImage

Image file output
renderPrint

Text Output
renderPlot

Plot Output
removeInputHandler

Deregister an Input Handler
renderCachedPlot

Plot output with cached images
registerThemeDependency

Register a theme dependency
reexports

Objects exported from other packages
addResourcePath

Resource Publishing
renderUI

UI Output
repeatable

Make a random number generator repeatable
runApp

Run Shiny Application
runTests

Runs the tests associated with this Shiny app
req

Check for required values
runGadget

Run a gadget
restoreInput

Restore an input value
tableOutput

Table Output
runExample

Run Shiny Example Applications
runUrl

Run a Shiny application from a URL
shiny-package

Web Application Framework for R
safeError

Declare an error safe for the user to see
setBookmarkExclude

Exclude inputs from bookmarking
serverInfo

Collect information about the Shiny Server environment
setSerializer

Add a function for serializing an input before bookmarking application state
session

Session object
shiny.appobj

Shiny App object
selectInput

Create a select list input control
shinyApp

Create a Shiny app object
sidebarLayout

Layout a sidebar and main area
showTab

Dynamically hide/show a tabPanel
showNotification

Show or remove a notification
getShinyOption

Get or set Shiny options
showModal

Show or remove a modal dialog
shinyUI

Create a Shiny UI handler
shinyAppTemplate

Generate a Shiny application from a template
showBookmarkUrlModal

Display a modal dialog for bookmarking
shinyDeprecated

Print message for deprecated functions in Shiny
shinyServer

Define Server Functionality
sliderInput

Slider Input Widget
snapshotPreprocessInput

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

Create a sizing function that grows at a given ratio
tabPanel

Create a tab panel
stopApp

Stop the currently running Shiny app
submitButton

Create a submit button
stacktrace

Stack trace manipulation functions
snapshotPreprocessOutput

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

Split layout
snapshotExclude

Mark an output to be excluded from test snapshots
testServer

Reactive testing for Shiny server functions and modules
updateCheckboxInput

Change the value of a checkbox input on the client
textInput

Create a text input control
tabsetPanel

Create a tabset panel
updateActionButton

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

Create a text output element
textAreaInput

Create a textarea input control
updateDateInput

Change the value of a date input on the client
titlePanel

Create a panel containing an application title.
updateCheckboxGroupInput

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

Change the value of a select input on the client
updateTextInput

Change the value of a text input on the client
updateSliderInput

Update Slider Input Widget
updateQueryString

Update URL in browser's location bar
updateTextAreaInput

Change the value of a textarea input on the client
updateRadioButtons

Change the value of a radio input on the client
urlModal

Generate a modal dialog that displays a URL
updateDateRangeInput

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

Change the value of a number input on the client
updateTabsetPanel

Change the selected tab on the client
wellPanel

Create a well panel
validate

Validate input values and other conditions
withMathJax

Load the MathJax library and typeset math expressions
withProgress

Reporting progress (functional API)
varSelectInput

Select variables from a data frame
withOtelCollect

Temporarily set OpenTelemetry (OTel) collection level
useBusyIndicators

Enable/disable busy indication
verticalLayout

Lay out UI elements vertically
viewer

Viewer options
NS

Namespaced IDs for inputs/outputs
bindEvent

Make an object respond only to specified reactive events
Progress

Reporting progress (object-oriented API)
MockShinySession

Mock Shiny Session
actionButton

Action button/link
ExtendedTask

Task or computation that proceeds in the background
bookmarkButton

Create a button for bookmarking/sharing
bindCache

Add caching with reactivity to an object
absolutePanel

Panel with absolute positioning
applyInputHandlers

Apply input handlers to raw input values