StandAlone Async single-file cross-platform Prettifier Beautifier for the Web.
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Async single-file cross-platform no-dependencies Prettifier Beautifier for the Web. GPL License LGPL License Python Version

screenshot --help

usage: [-h] [--version] [--prefix PREFIX] [--timestamp]
[--quiet] [--checkupdates] [--after AFTER]
[--before BEFORE] [--watch] [--group] [--justify]

CSS-HTML-Prettify. StandAlone Async single-file cross-platform no-dependencies
Unicode-ready Python3-ready Prettifier Beautifier for the Web.

positional arguments:
    fullpath         Full path to local file or folder.

optional arguments:
    -h, --help       show this help message and exit
    --version        show programs version number and exit
    --prefix PREFIX  Prefix string to prepend on output filenames.
    --timestamp      Add a Time Stamp on all CSS/SCSS output files.
    --quiet          Quiet, Silent, force disable all Logging.
    --checkupdates   Check for Updates from Internet while running.
    --after AFTER    Command to execute after run (Experimental).
    --before BEFORE  Command to execute before run (Experimental).
    --watch          Re-Compress if file changes (Experimental).
    --group          Group Alphabetically CSS Poperties by name.
    --justify        Right Justify CSS Properties (Experimental).
    --extraline      Add 1 New Line for each New Line (Experimental)

CSS-HTML-Prettify: Takes file or folder full path string and process all
CSS/SCSS/HTML found. If argument is not file/folder will fail. Check Updates
works on Python3. StdIn to StdOut is deprecated since may fail with unicode
characters. CSS Properties are AlphaSorted,to help spot cloned ones,Selectors
not. Watch works for whole folders, with minimum of ~60 Secs between runs.
  • Takes a full path to anything, a file or a folder, then parse, Prettify and Beautify for Human Development.
  • If full path is a folder with multiple files it will use Async Multiprocessing.
  • Pretty-Printed colored Logging to Standard Output and Log File on OS Temporary Folder.
  • Set its own Process name and show up on Process lists.
  • Full Unicode/UTF-8 support, SASS SCSS Support.
  • Smooth CPU usage.
  • Can Watch for changes on files.
  • Can execute arbitrary commands after and before running.
  • *.css files are saved as *.css, *.html are saved as *.html, unless provided a prefix.

Use file.html file.htm file.css file.scss /project/static/


pip install css-html-prettify

Uninstall pip uninstall css-html-prettify




  • BeautifulSoup 4+ (Recommeded, for HTML5 Prettify, without BeautifulSoup it works, but only strict XHTML can be processed)


Input CSS:

/* dont remove this comment */
.class, #NotHex, input[type="text"], a:hover  {
    margin:0 0 0 0;
    border-color:    fuchsia;
    color:           mediumspringgreen;
    background-position:0 0;
    transform-origin:0 0;
    margin: 0px !important;
    color: #000000;
    background-color: #FFFFFF;

.foo {content: "If you leave too much new lines it will add a horizontal line"}

Output CSS:

@charset utf-8;

/* dont remove this comment */
.class, #NotHex, input[type="text"], a:hover {
    background-color:    #FFFFFF;
    background-position: 0 0;
    border:              none;
    border-color:        fuchsia;

    color:               mediumspringgreen;
    color:               #000000;

    margin:              0 0 0 0;
    margin:              0 !important;

    transform-origin:    0 0;

/* ------------------------------------------------------------------------ */

.foo {content: "If you leave too much new lines it will add a horizontal line"}

Coding Style Guide

  • Lint, PEP-8, PEP-257, iSort must Pass Ok. pip install prospector pre-commit isort
  • If theres any kind of Tests, they must Pass Ok, if theres no Tests, its ok, if Tests provided, is even better.


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  • Help and more Help and Interactive Quick Git Tutorial.