# json.keys · Rell standard library · Chromia Docs (concept)

> pure function keys(): set < text > Get the keys of this JSON object. Throws exception — if this JSON value is not an object Since 0.14.16

Source: https://docs.chromia.com/pages/rell-stdlib/-rell-system-library/root/json/keys/

FUNCTION

# json.keys

```signature
pure function keys(): set<text>
```

Get the keys of this JSON object.

**Throws**

* `exception` — if this JSON value is not an object

Since 0.14.16

[View this page on docs.chromia.com](https://docs.chromia.com/pages/rell-stdlib/-rell%20-system%20-library/%5Broot%5D/json/keys.html)Generated API reference, mirrored from the live docs