Online R Compiler

Write, run, and share code snippets — no setup required.

script.R

Alice
30

Output

Click Run to see the output here.

lines <- readLines(con="stdin", n=2, warn=FALSE)
name <- lines[1]
age <- as.integer(lines[2])
cat(sprintf("Hello, %s! You are %d years old.\n", name, age))

Run R online in your browser

A free online R playground and code runner. Write R scripts in your browser, hit Run, and Rscript executes them in seconds. No RStudio, no local R install, no install.packages() wait to configure first.

The editor is built on the same engine as VS Code, so R syntax highlighting, autocompletion, and error squiggles all work. Code runs with Rscript on Alpine Linux, with dplyr, tidyr, stringr, and jsonlite pre-installed — the tidyverse core for data wrangling. Good for exploring a data frame, testing a regex with stringr, or parsing JSON with jsonlite.

What makes this R playground useful

Instant R execution — write code, press Run, and see output from Rscript in seconds, no install.packages() wait or RStudio setup needed.
Full R syntax highlighting, autocompletion, and clear error messages with line numbers, powered by the same editor engine as VS Code.
Stdin input is supported. readLines('stdin') and file('stdin') read from the playground's input box, so scripts that take interactive input or parse piped data work end-to-end. No R interpreter, RStudio, or CRAN mirror on your end.
R with dplyr, tidyr, stringr and jsonlite pre-installed — run real tidyverse data-analysis snippets without installing RStudio or the tidyverse locally.

What you can try in the R playground

Base-R vectors, data frames, and apply-family functions: the foundation you need before reaching for the tidyverse.
Tidyverse data pipelines: dplyr (filter, mutate, summarise, group_by) composed with the magrittr pipe, and tidyr pivot_longer / pivot_wider reshapes.
Quick R experiments: test a regex with stringr, parse a JSON blob with jsonlite, verify a statistical summary, or confirm how a grouped summarise behaves.

Online R compiler FAQ

Is the online R compiler free?

Yes, the R playground is free to use. No sign-up, no R to install, and no RStudio license — open the page and run scripts immediately.

Do I need R or RStudio installed?

No install needed. You don't need R, RStudio, or the tidyverse on your machine. The online R runner executes your script with Rscript and dplyr, tidyr, stringr, and jsonlite already loaded.

Does the R playground work on mobile and Chromebooks?

Yes. The R playground runs in any modern browser, on desktop, tablet or mobile. Good for running R scripts from a Chromebook, iPad, or school computer without installing RStudio.

Can I use readLines('stdin') in the online R compiler?

Yes. readLines('stdin') and file('stdin') read your typed lines the same way they would when you pipe input to Rscript script.R at the terminal. Useful for scripts that process ad-hoc data without a file upload.

How do I learn R after trying the playground?

Edit the sample R code, press Run, and iterate. When you want something more structured, Coddy's interactive R course covers vectors, data frames, the tidyverse, and visualization with hands-on exercises — a solid base whether you're headed for stats, data science, or bioinformatics.