# JSON.STRLEN

```json metadata
{
  "title": "JSON.STRLEN",
  "description": "Returns the length of the JSON String at path in key",
  "categories": ["docs","develop","stack","oss","rs","rc","oss","kubernetes","clients"],
  "arguments": [{"name":"key","type":"key"},{"name":"path","optional":true,"type":"string"}],
  "syntax_fmt": "JSON.STRLEN key [path]",
  "complexity": "O(1) when path is evaluated to a single value, O(N) when path is evaluated to multiple values, where N is the size of the key",
  "group": "json",
  "acl_categories": ["@json","@read","@slow"],
  "since": "1.0.0",
  "tableOfContents": {"sections":[{"id":"required-arguments","title":"Required arguments"},{"id":"optional-arguments","title":"Optional arguments"},{"id":"examples","title":"Examples"},{"id":"redis-enterprise-and-redis-cloud-compatibility","title":"Redis Enterprise and Redis Cloud compatibility"},{"id":"return-information","title":"Return information"},{"id":"see-also","title":"See also"},{"id":"related-topics","title":"Related topics"}]}
}
```













Report the length of the JSON String at `path` in `key`

[Examples](#examples)

## Required arguments

<details open><summary><code>key</code></summary> 

is key to parse.
</details>

## Optional arguments

<details open><summary><code>path</code></summary> 

is JSONPath to specify. Default is root `$`, if not provided. Returns null if the `key` or `path` do not exist.
</details>

## Examples


redis> JSON.SET doc $ '{"a":"foo", "nested": {"a": "hello"}, "nested2": {"a": 31}}'
OK
redis> JSON.STRLEN doc $..a
1) (integer) 3
2) (integer) 5
3) (nil)


## Redis Enterprise and Redis Cloud compatibility

| Redis<br />Enterprise | Redis<br />Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> |
|:----------------------|:-----------------|:------|
| <span title="Supported">&#x2705; Supported</span><br /> | <span title="Supported">&#x2705; Flexible & Annual</span><br /><span title="Supported">&#x2705; Free & Fixed</nobr></span> |  |

## Return information

{{< multitabs id="json-strlen-return-info"
    tab1="RESP2"
    tab2="RESP3" >}}

With `$`-based path argument: [Array reply](https://redis.io/docs/latest/develop/reference/protocol-spec#arrays) of [integer replies](https://redis.io/docs/latest/develop/reference/protocol-spec#integers) or [null replies](https://redis.io/docs/latest/develop/reference/protocol-spec#nulls), where each element is the string's length, or `null` if the matching value is not a string.

With `.`-based path argument: [Integer reply](https://redis.io/docs/latest/develop/reference/protocol-spec#integers) representing the string's length, or [null reply](https://redis.io/docs/latest/develop/reference/protocol-spec#nulls) if the matching value is not a string.

-tab-sep-

With `$`-based path argument (default): [Array reply](https://redis.io/docs/latest/develop/reference/protocol-spec#arrays) of [integer replies](https://redis.io/docs/latest/develop/reference/protocol-spec#integers) or [null replies](https://redis.io/docs/latest/develop/reference/protocol-spec#nulls), where each element is the string's length, or `null` if the matching value is not a string.

With `.`-based path argument: [Integer reply](https://redis.io/docs/latest/develop/reference/protocol-spec#integers) representing the string's length, or [null reply](https://redis.io/docs/latest/develop/reference/protocol-spec#nulls) if the matching value is not a string.



## See also

[`JSON.ARRLEN`](https://redis.io/docs/latestcommands/json.arrlen/) | [`JSON.ARRINSERT`](https://redis.io/docs/latestcommands/json.arrinsert/) 

## Related topics

* [RedisJSON](https://redis.io/docs/latest/develop/data-types/json/)
* [Index and search JSON documents](https://redis.io/docs/latest/develop/ai/search-and-query/indexing/)