SHA512 hash: sha512

The sha512 template function calculates the SHA512 hash of a string and returns the result as a hexadecimal string. SHA512 produces a 512-bit (128-character hex) hash value and is part of the SHA-2 family of cryptographic hash functions.

This is the strongest hash function available in Home Assistant templatesA template is an automation definition that can include variables for the action or data from the trigger values. This allows automations to generate dynamic actions. [Learn more]. It produces the longest hash output, which minimizes the chance of collisions. Use it when you need maximum hash strength, or when an external service specifically requires SHA512. For most purposes, sha256 is sufficient. For shorter hashes where security is not critical, see md5 or sha1.

Usage

Here’s how to use this template function. Copy any example and adjust it to your setup.

{{ sha512("Hello, World!") }}

374d794a95cdcfd8b35993185fef9ba368f160d8daf432d08ba9f1ed1e5abe6cc69291e0fa2fe0006a52570ef18c19def4e617c33ce52ef0a6e5fbe318cb0387

{{ "Hello, World!" | sha512 }}

374d794a95cdcfd8b35993185fef9ba368f160d8daf432d08ba9f1ed1e5abe6cc69291e0fa2fe0006a52570ef18c19def4e617c33ce52ef0a6e5fbe318cb0387

Function signature

The signature is a technical summary of this template function. It shows the name of the function, the values (called parameters) it accepts, and what type of data each parameter expects (for example, a piece of text or a number).

Function parameters that have a = with a value after them are optional. If you leave them out, the default value shown is used automatically. Function parameters without a default are required.

sha512(
    value: str,
) -> str

Function parameters

The following parameters can be provided to this function.

Good to know

• The result is always a 128-character lowercase hexadecimal string.
• SHA512 is cryptographically strong but produces the longest output. Use sha256 when you need a shorter but still secure hash.

Try it yourself

Ready to test this? Open Developer tools > Template, paste the example into the Template editor, and watch the result update on the right. Edit the values to see how the function adapts to your own entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more].

More examples

Real scenarios where this function comes up in automations and templates. Copy any example and adapt it to your setup.

Generate a long unique identifier

Create a strong hash from an entity ID for use as a unique key.

{{ sha512("binary_sensor.front_door") }}

a1b2c3d4e5f6...

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with your template and expected result, or share on our subreddit /r/homeassistant.

Related template functions

These functions work well alongside this one:

• MD5 hash: md5 - Calculates the MD5 hash of a string.

• SHA1 hash: sha1 - Calculates the SHA1 hash of a string.

• SHA256 hash: sha256 - Calculates the SHA256 hash of a string.