Do you know some tool to

automatically inline both CSS and JavaScript external resources into a HTML file?

The goal is to have a single HTML file which can be properly viewed off-line.

Similar to some old question on StackOverflow (but the answers there seem to support CSS only, not Javascript).

Either of the platforms: online (web access), Unix, Windows is fine.

I thought that could be reached by replacing all:

<script type="text/javascript" src="x.js"></script>


   <script type="text/javascript">
     And here goes the content of the x.js file

and similarly all <link rel="stylesheet" type="text/css" href="theme.css"> with

   Here goes the content of theme.css

(or whatever the actual syntax is)

  • 2
    Could you please edit your question and name your requirements concerning the OS it should run on?
    – Izzy
    Commented Jul 21, 2014 at 11:09
  • 1
    Added the clarification. Commented Jul 21, 2014 at 14:44
  • 1
    Would the source be a webpage online or from source files you have on your computer? Commented Jul 21, 2014 at 18:19
  • @NickWilde - I will have the HTML file on my computer, while the links will be on the Internet (http://), e.q. to the publicly hosted Javascript libraries (e.g. JQuery). | But if it's a problem, I can always wget all the resources. Commented Jul 21, 2014 at 18:21
  • okay then I think I have a good option. I'll just test it before actually recommending it (I downloaded it a while back but haven't got around to playing with it yet) Commented Jul 21, 2014 at 18:24

5 Answers 5



  • Install Python 2.7x - make sure to select the option to add it to the PATH var
  • Install Node.js
  • Install Windows SDK 7.1 . It'll work on any thing XP+. Windows SDK 8 won't work out of the box - doesn't include all the tools. If you have the VS 2010 redistributables installed already try unchecking them in the installer for the Windows SDK - otherwise you may have to uninstall them to be able to install this and then reinstall the newer version if you need to at some point.
  • Install WebCombiner Node.js package. Best to use cmd line npm install -g web-combiner from the SDK commandline rather than the normal cmd line is easiest
  • run command line inliner path.html out.html true

These instructions assumes windows - if not windows the SDK obviously is not needed but alternative compiler might be required.

Any <link href= have to refer to local files or it doesn't like it (ie fatal error). This could probably be fixed fairly easily but it is a weakness currently. Worst part of this is it doesn't check that it is a css link so atom/image refs under <link cause problems too. Obviously that means the css/js have to be local but just going save as html page from Firefox or Chrome saves those by default so that shouldn't be a serious problem though slightly annoying.


Nick Wilde's answer led to me another answer:

another nodejs project called Inliner.

(I have only started to try to use that and haven't succeeded with my goal yet - as some bugs pop up)

  • The source code for "Nick Wilde's" WebCombiner contained a comment pointing to the Inliner project: github.com/newghost/web-combiner/commit/… Commented Jul 22, 2014 at 12:06
  • The Inliner tool has some bugs too. I've encountered this one: github.com/remy/inliner/issues/13 But other than that - it seems to work pretty well. E.g. nodejs ./inliner.js -i "http://softwarerecs.stackexchange.com/questions/9983/tool-to-automatically-inline-both-css-and-javascript-into-html" yields a large HTML file with JQuery and others inlined. Commented Jul 22, 2014 at 12:39
  • In case anyone is interested, I've managed to troubleshoot the issue #13 and submitted a pull request to the repository. Works for me. Commented Jul 22, 2014 at 15:14
  • I used this inliner tool recently, and it works great. Currently, it does not inline already minified javascript (*.min.js). However, by editing the source you could get around that, if needed.
    – Marcel
    Commented Nov 10, 2015 at 7:12

Your question is not very clear, but the closer I can see to your goal (a single HTML file) is the MHTML format. Ok, it's not a single HTML file, but a single MHTML file, but, you can include JS, CSS and much more inside, like images!

Microsoft IE is able to save a page into a single MHT file.

The Firefox plugin UnMHT alows you to render this file on every OS.

Here is an interesting page about it:

How to open .mht files in Firefox on Linux

  • he said that if he want to to this, it's to "have a single HTML file which can be properly viewed off-line.". So, this is another way to the same goal… IMHO, but his question is not clear
    – Pascal Qyy
    Commented Jul 21, 2014 at 17:24
  • OK, I guess this has the same end result (view off-line), but the OP was thinking of a different method than what you've said Commented Jul 21, 2014 at 17:27
  • I know, and maybe it's because he don't know other method was aviable (I don't know), so, it's why I suggest this method.
    – Pascal Qyy
    Commented Jul 21, 2014 at 17:35
  • @PascalQyy "IMHO, but his question is not clear" - please help me make the question clearer. What information do you lack? Commented Jul 21, 2014 at 17:41
  • 1
    Relevant: XY problems - sometimes the asker is asking the wrong question. This answer could be the right answer, if so.
    – Bobson
    Commented Jul 21, 2014 at 19:48

I'm adding this because I recently needed to do the exact task but this solution seems easier to setup....

You can install python then run pip install htmlark[http,parsers] to install HTMLArk.

usage: htmlark [-h] [-o OUTPUT] [-E] [-I] [-C] [-J]
               [-p {html.parser,lxml,html5lib,auto}] [-v] [--version]

Converts a webpage including external resources into a single HTML file. Note
that resources loaded with JavaScript will not be handled by this program, it
will only work properly with static pages.

positional arguments:
  webpage               URL or path of webpage to convert. If not specified,
                        read from STDIN.

optional arguments:
  -h, --help            show this help message and exit
  -o OUTPUT, --output OUTPUT
                        File to write output. Defaults to STDOUT.
  -E, --ignore-errors   Ignores unreadable resources
  -I, --ignore-images   Ignores images during conversion
  -C, --ignore-css      Ignores stylesheets during conversion
  -J, --ignore-js       Ignores external JavaScript during conversion
  -p {html.parser,lxml,html5lib,auto}, --parser {html.parser,lxml,html5lib,auto}
                        Select HTML parser. If not specifed, htmlark tries to
                        use lxml, html5lib, and html.parser in that order (the
                        'auto' option). See documentation for more
  -v, --verbose         Prints information during conversion
  --version             Displays version information

The resulting html is printed to the standard output so you need to use output redirection to save it to a file like this: htmlark http://example.com/ > inlined.html


This open source tool from Wildbit (makers of postmark) was just released and looks promising...


Simple CSS inlining, for email, for C# and other .net-based languages.


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