sha1

Generates a SHA1 hash of a string. Returns a hex-encoded hash string.

{% assign hash = "hello world" | sha1 %}
{% log hash %}

Output:

2aae6c35c94fcfb415dbe95f408b9ce91ee846ed

Syntax

{{ value | sha1 }}

Parameter	Description
value	The string to hash

Return Value

Returns a hex-encoded SHA1 hash string (40 characters).

Examples

Generate a hash for deduplication:

{% assign content_hash = email.body.text | sha1 %}
{% log "Content hash: " | append: content_hash %}

Create a cache key:

{% capture cache_key_input %}{{ product.id }}-{{ product.updated_at }}{% endcapture %}
{% assign cache_key = cache_key_input | sha1 %}
{% log cache_key %}

Generate a unique identifier from combined fields:

{% capture combined %}{{ order.name }}{{ order.email }}{{ order.created_at }}{% endcapture %}
{% assign unique_id = combined | sha1 %}
{% log unique_id %}

Notes

• Always returns a hex-encoded string (lowercase, 40 characters)

• SHA1 is suitable for checksums and deduplication, but not for security-sensitive operations

• For HMAC-based authentication, use hmac_sha256 instead

• See also: hmac_sha256, base64_encode