> ## Documentation Index
> Fetch the complete documentation index at: https://upstash.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# JSON.OBJLEN

> Get JSON object size.

Use `JSON.OBJLEN` to get the number of fields in the objects a path selects.

Without a path the root value is used. The reply holds one count per match, with null for matches that are not objects. It counts only the object's own fields, not the fields of nested objects.

## Syntax

```redis theme={"system"}
JSON.OBJLEN <key> [path]
```

## Arguments

| Argument | Required | Repeatable | Description                                   |
| -------- | -------- | ---------- | --------------------------------------------- |
| `key`    | Yes      | No         | JSON document key.                            |
| `path`   | No       | No         | Path selecting objects; defaults to the root. |

## Important points

* Raw TCP examples pass JSON values as valid JSON text. Typed Upstash SDK helpers serialize native objects and values for you.
* Paths beginning with `$` use JSONPath and can match multiple values, so many JSON commands return an array of per-match results.

## Response

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

| Protocol | Reply                                                                               |
| -------- | ----------------------------------------------------------------------------------- |
| RESP2    | Integer, array of integer lengths or null values, or Null bulk string or null array |
| RESP3    | Integer, array of integer lengths or null values, or Null                           |

<Note>
  Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.
</Note>

## Examples

TCP examples use the TLS `REDIS_URL` from the Upstash console. REST examples use `UPSTASH_REDIS_REST_URL` and `UPSTASH_REDIS_REST_TOKEN`.

<AccordionGroup>
  <Accordion title="Redis CLI" icon="terminal">
    ```bash theme={"system"}
    JSON.OBJLEN profile $
    ```
  </Accordion>

  <Accordion title="@upstash/redis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import { Redis } from "@upstash/redis";

    const redis = Redis.fromEnv();

    const lengths = await redis.json.objlen("key", "$.path");
    ```
  </Accordion>

  <Accordion title="upstash_redis" icon="python" iconType="brands">
    ```python theme={"system"}
    from upstash_redis import Redis

    redis = Redis.from_env()
    result = redis.json().objlen("profile", "$")
    print(result)
    ```
  </Accordion>

  <Accordion title="ioredis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import Redis from "ioredis";

    const redis = new Redis(process.env.REDIS_URL!);
    const result = await redis.call("JSON.OBJLEN", "profile", "$");
    console.log(result);
    ```
  </Accordion>

  <Accordion title="node-redis" icon="node-js" iconType="brands">
    ```ts theme={"system"}
    import { createClient } from "redis";

    const client = await createClient({ url: process.env.REDIS_URL })
      .on("error", console.error)
      .connect();
    const result = await client.json.objLen("profile", { path: "$" });
    console.log(result);
    ```
  </Accordion>

  <Accordion title="redis-py" icon="python" iconType="brands">
    ```python theme={"system"}
    import os
    import redis

    client = redis.from_url(os.environ["REDIS_URL"])
    result = client.json().objlen("profile", "$")
    print(result)
    ```
  </Accordion>

  <Accordion title="go-redis" icon="golang" iconType="brands">
    ```go theme={"system"}
    package main

    import (
        "context"
        "fmt"
        "os"

        "github.com/redis/go-redis/v9"
    )

    func main() {
        opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))
        if err != nil {
            panic(err)
        }
        client := redis.NewClient(opts)
        result, err := client.JSONObjLen(context.Background(), "profile", "$").Result()
        if err != nil {
            panic(err)
        }
        fmt.Println(result)
    }
    ```
  </Accordion>

  <Accordion title="jedis" icon="java" iconType="brands">
    ```java theme={"system"}
    import java.net.URI;

    import redis.clients.jedis.JedisPooled;

    try (JedisPooled jedis = new JedisPooled(new URI(System.getenv("REDIS_URL")))) {
      Object result = jedis.jsonObjLen("profile", new redis.clients.jedis.json.Path("$"));
      System.out.println(result);
    }
    ```
  </Accordion>

  <Accordion title="redis-rs" icon="rust" iconType="brands">
    ```rust theme={"system"}
    use redis::JsonCommands;

    fn main() -> redis::RedisResult<()> {
        let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");
        let client = redis::Client::open(url)?;
        let mut connection = client.get_connection()?;

        let result: redis::Value = connection.json_obj_len("profile", "$")?;
        println!("{result:?}");
        Ok(())
    }
    ```
  </Accordion>
</AccordionGroup>


## Related topics

- [JSON.OBJLEN](/docs/redis/sdks/py/commands/json/objlen.md)
- [JSON commands](/docs/redis/commands/json/overview.md)
- [JSON.FORGET](/docs/redis/commands/json/json-forget.md)
- [JSON.GET](/docs/redis/commands/json/json-get.md)