---
url: https://developer.youcan.shop/themes/filters/strings/hmacSha1.md
---
# Hmac Sha1

Returns the HMAC SHA-1 hash of a string, with a secret key.

```liquid
{{ string | hmac_sha1: key }}
```

## Example

```liquid
{{ 'youcan' | hmac_sha1: 'secret' }}
```

::: tip Output

```html
459f11edd0a43820ab7b567bca863647c8552e2a
```

:::