---
title: "Liquid filters: sha1"
description: Converts a string into an SHA-1 hash. SHA-1 is not considered safe anymore. Please use ['blake3'](https://shopify.dev/docs/api/liquid/filters/blake3) instead for better security and performance.
api_name: liquid
source_url:
  html: https://shopify.dev/docs/api/liquid/filters/sha1
  md: https://shopify.dev/docs/api/liquid/filters/sha1.md
---

# sha1

```oobleck
string | sha1: string
```

returns [string](https://shopify.dev/docs/api/liquid/basics#string)

Converts a string into an SHA-1 hash. SHA-1 is not considered safe anymore. Please use ['blake3'](https://shopify.dev/docs/api/liquid/filters/blake3) instead for better security and performance.

```liquid
{%- assign secret_potion = 'Polyjuice' | sha1 -%}


My secret potion: {{ secret_potion }}
```

##### Code

```
{%- assign secret_potion = 'Polyjuice' | sha1 -%}

My secret potion: {{ secret_potion }}
```

## Output

```html
My secret potion: bd0ca3935467e5238d7662ada4df899f09b70d5a
```