Append

{{ page.headline | append: ''}}

Appends an image at the end of the Page Headline output.

{{ page.headline | append: ' by Author'}}

Appends the words 'by Author' to the end of the Page Headline output.

Capitalize

{{ page.headline | capitalize }}

Capitalizes the first words in a page's headline field.

Date

{{ event.event.local_start_at | date: '%A, %B %d, %Y at %I:%M %p' }}{% if page.event.is_multi_day? %} through {{ page.event.local_end_at | event_date }}{% endif %}

Will display the date in this format: "Sunday, September 29, 2012 at 6:30pm through October 01, 2012"

Default

{{ '' | default: "Default Text" }} = Default Text

The default value is returned if the variable resolves to nil or an empty string "". A string containing whitespace characters will not resolve to the default value.

Downcase

{{ page.headline | downcase }}

Converts the page headline output into all lowercase letters.

Escape

{{ "
test
" | escape }}

HTML tags are not rendered: <p>test</p>

Prepend

{{ page.headline | prepend: ''}}

Adds an image in front of the Page Headline output.

Remove

{{ post.blog_post.content | remove: 'the' }}

Removes all occurrences of 'the' in the output for the blog post content tag.

Remove First

{{ post.blog_post.content | remove_first: 'the' }}

Removes only the first occurrence of 'the' in the output for the blog post content tag.

Replace

{{ "polar bears and polar ice caps" | replace: 'polar', 'brown' }}

The resulting text would be "brown bears and brown ice caps"

Replace_first

{{ "polar bears and polar ice caps" | replace_first: 'polar', 'brown' }}

The resulting text would be: "brown bears and polar ice caps"

Slice

{{ "hello" | slice: 0 }} = h
{{ "hello" | slice: 1 }} = e
{{ "hello" | slice: 1,3 }} = ell

The slice filter returns a substring, starting at the specified index. An optional second parameter can be passed to specify the length of the substring. If no second parameter is given, a substring of one character will be returned.

Split

{% assign split_pieces = "these-are-words-with-a-split-character" | split: '-' %}
{{ split_pieces[0] }} = these
{{ split_pieces[1] }} = are
{{ split_pieces[2] }} = words
{{ split_pieces[3] }} = with
{{ split_pieces[4] }} = a
{{ split_pieces[5] }} = split
{{ split_pieces[6] }} = character

The split filter takes on a substring as a delimiter to divide a string into an array.

Strip

{{ '     too many spaces     ' | strip }} = "too many spaces"

Strips tabs, spaces, and newlines (whitespace) from both the left and right sides of a string.

Left Strip

{{ '     too many spaces     ' | lstrip }} = "too many spaces     "

Strips tabs, spaces, and newlines (whitespace) from only the left side of a string.

Right Strip

{{ '     too many spaces     ' | rstrip }} = "     too many spaces"

Strips tabs, spaces, and newlines (whitespace) from only the right side of a string.

Strip HTML

{{ post.blog_post.content | strip_html }}

Removes all html tags from the blog post content.

Truncate Characters

{{ post.headline | truncatechars:10 }}

Limits the amount of characters displayed from the Post Headline to 10.

Truncate Words

{{ post.headline | truncatewords:10 }}

Limits the amount of characters displayed from the Post Headline to 10.

Paginate

{{ page.blog.most_recent_blog_posts | paginate }}

Paginates the most recent blog posts.

Uniq

{% assign duplicateItems = "one one two two three three four four" %}
{{ duplicateItems | split: ' ' | uniq }} = "onetwothreefour"

Removes any duplicate instances of an element in an array.

Upcase

{{ page.headline | upcase }}

Converts the page headline output into all capital letters.

URL Encode

{{ " & " | url_encode }}

Replaces any special characters with appropriate %XX replacements, including the ampersand (&): %3Chello%3E+%26+%3Cgoodbye%3E

md5

{{ page.name | md5 }}

Converts a string into an MD5 hash, e.g. page.name: fff5fd234956c4c841290a9c423f9a81

sha256

{{ page.name | sha256 }}

Converts a string into a SHA-256 hash, e.g. page.name: 1589bc5b0028a0281915e82ef56907632e295e77340223a72d935828713b50d1

hmac_sha1

{% assign my_secret_string = "MySecretString" | hmac_sha1: "secret_key" %}
My encoded string is: {{ my_secret_string }}

Converts a string into a SHA-1 hash, e.g.
My encoded string is: 3bd702e964f598b21130064c4c62e0779936c123

hmac_sha256

{% assign my_secret_string = "MySecretString" | hmac_sha256: "secret_key" %}
My encoded string is: {{ my_secret_string }}

Converts a string into a SHA-256 hash, e.g.
My encoded string is: 95be5b9ec4695051549e7fe35bd6191ae6e414e7e91eb5430a43d7bfffc45a8a

hmac_sha512

{% assign my_secret_string = "MySecretString" | hmac_sha512: "secret_key" %}
My encoded string is: {{ my_secret_string }}

Converts a string into a SHA-512 hash, e.g.
My encoded string is: 48252f4340451f55fdefd71b0bd5883ae88ab007d3f5210d98b0ad86ddf8682c3308bc25970ff20fbcdbd59154b02863251daa3ef25940696841e4a73e5977fb

Plus

{{ '10' | plus:5 }} = 15

Minus

{{ '10' | minus:5 }} = 5

Times

{{ '10' | times:5 }} = 50

Divided By

{{ '20' | divided_by:5 }} = 4

Modulo

{{ '26' | modulo:5 }} = 1

Divides an output by a number and returns the remainder.

Round

{{ '10.34' | round }} = 10

Rounds the output to the nearest integer.

{{ '10.345678' | round: 2 }} = 10.35

Rounds the output to the nearest specified number of decimal places.

Ceil

{{ '10.34' | ceil }} = 11

Rounds an output up to the nearest integer.

Floor

{{ '10.34' | floor }} = 10

Rounds an output down to the nearest integer.

Join

{{ 'site.page_tags' | join: ', ' }} = tag1, tag2, tag3

Combines the elements of an array with the character passed as the delimiter. The result is a single string.

First

{{ 'site.page_tags' | first }} = tag1

Returns the first element of an array

Last

{{ 'site.page_tags' | last }} = tag3

Returns the last element of an array

Map

{% assign mapped_tags = site | map: 'page_tags' %}
{{ mapped_tags }}= tag1tag2tag3

Accepts an array element's attribute as a parameter and creates a string out of each array element's value.

Size

{{ 'site.page_tags' | size }} = 3

Returns the size of a string or an array.

Size can be used in dot notation, in cases where it needs to be used inside a tag:

{% if array.element.size > 10 %}
	There are 10 of this element.
{% endif %}