# YandexImageResizer

YandexImageResizer is a specialized utility bot from the Russian search engine Yandex. Its purpose is to retrieve and process images from websites to create optimized, resized versions (e.g., thumbnails) for display across Yandex's services, such as in search results. This helps improve performance and user experience by ensuring images load quickly and are appropriately formatted.

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## What is YandexImageResizer?

YandexImageResizer is a utility bot from Yandex that identifies, retrieves, and processes images from websites. It is a specialized crawler that focuses only on image content. The bot identifies itself with the user-agent string `Mozilla/5.0 (compatible; YandexImageResizer/2.0; +http://yandex.com/bots)`. Unlike general-purpose crawlers, it has a very specific technical function: to resize images for different display contexts within Yandex services.


## Why is YandexImageResizer crawling my site?

YandexImageResizer is visiting your website to process images that are or will be displayed in Yandex's services, such as in search results or image search. If your site's images appear in Yandex search, the bot will visit to process them. The frequency of visits depends on how often your content appears in Yandex search and how frequently your image content changes. This is a legitimate activity as part of Yandex's service.


## What is the purpose of YandexImageResizer?

The purpose of YandexImageResizer is to optimize images for display across various Yandex services. When Yandex needs to show an image thumbnail or an optimized version of an image from a website, this bot processes the original, full-sized image into the appropriate format and size. This helps Yandex deliver a faster, more efficient user experience and reduces bandwidth consumption. For website owners, this processing can indirectly benefit your content's visibility within the Yandex ecosystem.


## How do I block YandexImageResizer?

To prevent YandexImageResizer from accessing your site's images, you can add a specific disallow rule to your `robots.txt` file. This is the standard method for managing crawler access.

To block this bot, add the following lines to your `robots.txt` file:

```
User-agent: YandexImageResizer
Disallow: /
```


## Related agents and operators


## Canonical

Human friendly, reader version of this article is available at [YandexImageResizer](https://plainsignal.com/agents/yandeximageresizer)

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