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Use STRLEN to get the length in bytes of the string stored at a key. The reply is 0 when the key does not exist, and an error when the value is not a string. Since the value itself is never transferred, it is the cheap way to check how large a value is, for instance before deciding whether to fetch it or to read only part of it with GETRANGE. The count is in bytes, so multi-byte characters count more than once.

Syntax

Arguments

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

Examples

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

Related topics

STRLENJSON.STRLEN