This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The padding-block-start CSS property defines the logical block start padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation. It corresponds to the padding-top, padding-right, padding-bottom, or padding-left property depending on the values defined for writing-mode, direction, and text-orientation.

It relates to padding-block-end, padding-inline-start, and padding-inline-end, which define the other paddings of the element.

/* <length> values */
padding-block-start: 10px;      /* An absolute length */
padding-block-start: 1em;       /* A length relative to the text size */

/* <percentage> value */
padding-block-start: 5%;        /* A padding relative to the block container's width */

/* Global values */
padding-block-start: inherit;
padding-block-start: initial;
padding-block-start: unset;
Initial value 0
Applies to all elements
Inherited no
Percentages logical-width of containing block
Media visual
Computed value as <length>
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar



The padding-block-start property takes the same values as the padding-left property.

Formal syntax



HTML Content

  <p class="exampleText">Example text</p>

CSS Content

div {
  background-color: yellow;
  width: 120px;
  height: 120px;

.exampleText {
  writing-mode: vertical-lr;
  padding-block-start: 20px;
  background-color: #C8C800;


Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support No ?


38 — 511

No No No
Feature Android webview Chrome for Android Edge mobile Firefox for Android IE mobile Opera Android iOS Safari
Basic support No ? Yes


38 — 511

No No No

1. From version 38 until version 51 (exclusive): this feature is behind the layout.css.vertical-text.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

See also

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