mPDF Manual – CSS & Stylesheets


Default CSS styles are defined in defaultCSS configuration variable which is based on the recommended default values for HTML4 -

The appearance of a default mPDF document based on HTML should approximate to its appearance in a browser.

The following are supported (in order of ascending priority - lower ones in list overwrite higher):

  • HTML attributes e.g. <div align="center"> (see supported HTML attributes)
  • CSS Stylesheets - included in header of HTML document or as <link /> or as @import()
    • html tags e.g. p { font-size:12pt; color:#880000; }
    • class e.g. .stylename { font-size:9pt; }
    • id e.g. #style { font-size:9pt; }
  • In-line CSS style e.g. <p style="font-family:monospace;">

Note: Prior to mPDF 5.x HTML attributes overrode CSS styles.

CSS attributes, used in stylesheets or in-line, can define:

  • most tags/elements e.g. div, p, body, table, span
  • class-names e.g. p.mystylename { font-size:9pt; }
  • id e.g. div#style { font-size:9pt; }

Tag, class and id can share a similar name e.g. p {...} .p {...} and #p {...} are handled uniquely

There is some support for ‘cascaded’ CSS e.g. div.topic table.type1 td {...}

  • table, tr, th and td will only be recognised as the last items (as above)
  • only ‘block’ elements (not ‘in-line’) can be included i.e. div.style1 a {...} will not work, nor will a#class1 {...}

For a full list of CSS attributes supported see Supported CSS

Note the OUTLINE style (which is not supported in most browsers) does work in mPDF e.g.

<span style="outline-width:thin|medium|thick; outline-color:#rrggbb|invert">

Using a stylesheet

The WriteHTML() method takes second parameter i.e. $mode. See WriteHTML() for details of this and other parameters.



Use this (default) if the text you pass is a complete HTML page including head and body and style definitions.
Use this when you want to set a CSS stylesheet - see example below
Write HTML code without the <head> information. Does not need to be contained in <body>

Example using a stylesheet


$stylesheet = file_get_contents('style.css');


Media selectors

mPDF supports media-dependent CSS styles as:

@media print {
    p { 
        color: red; 

<style media="print">
    p { 
        color: red; 

<link rel="stylesheet" media="print" href="..." />

By default mPDF will match stylesheets set for “print” or “all” media. This can be changed by the configurable variable CSSselectMedia.

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