What Type of Data Can Redis Store?


Angela Bailey

Redis is an incredibly versatile and powerful tool for data storage. It can handle a wide range of data types, making it suitable for various use cases. In this article, we will explore the different types of data that Redis can store and how to work with them.


One of the simplest and most commonly used data types in Redis is strings. You can store any kind of text or binary data as a string.

Strings are also the basic building blocks for other complex data types in Redis.


Lists are collections of strings, ordered by their insertion order. You can add elements to a list from either end – the head or the tail.

Redis provides a rich set of operations to manipulate lists, such as pushing, popping, and trimming.


Sets are unordered collections of unique strings. Unlike lists, sets do not preserve any specific order.

Redis allows you to perform various set operations like adding elements, removing elements, checking membership, and performing set intersections or unions.


Hashes are maps between string fields and string values. They are useful when you need to store structured data that can be accessed by field name efficiently.

With hashes, you can get, set, and delete individual fields or retrieve all fields at once.

Sorted Sets

Sorted sets are similar to sets but each element has an associated score. The elements in a sorted set are ordered based on their scores in ascending order by default.

This type is ideal for scenarios where you need to maintain a leaderboard or perform range queries on scores.


Bitmaps allow you to store and manipulate compact arrays of bits (1s and 0s). They are particularly useful for scenarios like tracking user activity or storing boolean values efficiently.

Redis provides bitwise operations to perform various operations on bitmaps.


HyperLogLogs are probabilistic data structures used for counting unique elements in a set. They offer constant memory usage regardless of the number of elements being tracked.

HyperLogLogs provide approximate cardinality calculations with a small margin of error.

Geospatial Indexes

Redis also supports geospatial indexing, allowing you to store and query data based on their geographic coordinates. This feature is useful for building location-based applications or performing proximity searches efficiently.


Redis is not limited to storing simple key-value pairs. It supports a wide range of data types, providing flexibility and efficiency for various use cases.

Whether you need to store strings, lists, sets, hashes, sorted sets, bitmaps, HyperLogLogs, or geospatial data, Redis has got you covered.

So go ahead and explore the power of Redis by leveraging its diverse data storage capabilities!

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