RStudio addins to prettify JavaScript / HTML / CSS / Markdown / C++ and more.

JavaScript example:

The Markdown prettifier also prettifies the code blocks:


The 'shiny' addins are the ones you can see on the above GIFs. The other ones are not interactive. The 'Prettify C/C++/Java' addin requires clang-format (it is possible to reindent C/C++/Java (and more) with the 'Indent (shiny)' addin).

Moreover, this version exports the functions used to prettify/reindent. For example:

code <- c(
  "function f(x){",
  "return x+1",
cat(prettify_V8(code, "javascript"))


function f(x) {
  return x + 1;

Copies of license agreements

The 'prettifyAddins' package as a whole is distributed under GPL-3 (GNU GENERAL PUBLIC LICENSE version 3).

It includes other open source software components:

Full copies of the license agreements used by these components are included in the file LICENSE.note.

Try the prettifyAddins package in your browser

Any scripts or data that you put into this service are public.

prettifyAddins documentation built on Jan. 25, 2022, 5:09 p.m.