Overview
YandexImageResizer is a search crawler from Yandex used for search indexing, URL discovery, page rendering, result freshness, and search-quality checks.
Its primary user-agent pattern is YandexImageResizer; related patterns include YandexImageResizer Yandex robot; a representative HTTP user-agent is Mozilla/5.0 (compatible; YandexImageResizer/1.0; +http://yandex.com/bots).
YandexImageResizer is verified with High confidence. The identity type is Official Documented, and the evidence basis is official operator documentation.
YandexImageResizer is marked as respecting robots.txt directives for crawler access control.
YandexImageResizer can usually be allowed after confirming the source and monitoring request volume.
Identity
- User-Agent Pattern
-
YandexImageResizer - Aliases
- YandexImageResizer Yandex robot
- HTTP Agent Examples
-
Mozilla/5.0 (compatible; YandexImageResizer/1.0; +http://yandex.com/bots) - Robots Token
- YandexImageResizer
- Identity Type
- Officially documented
- Evidence Method
- Verify YandexImageResizer by matching `YandexImageResizer` to Yandex evidence, then checking reverse DNS, source-network ownership, signed request data, or published crawler documentation when available.
Classification
- Type
- Search
- Kind
- Fetcher
- Family
- Yandex
- Purpose
- Indexing
Behavior and handling
- Common Use
- YandexImageResizer is used for search indexing, URL discovery, page rendering, result freshness, and search-quality checks.
- Detection Notes
- YandexImageResizer traffic is primarily detected by the `YandexImageResizer` user-agent pattern; related patterns include `YandexImageResizer Yandex robot`; a representative HTTP user-agent is `Mozilla/5.0 (compatible; YandexImageResizer/1.0; +http://yandex.com/bots)`. Compare source IPs, reverse DNS, request paths, and crawl cadence with Yandex infrastructure before trusting the traffic.
- Respects robots.txt
- Yes
- Spoofing Risk
- YandexImageResizer has medium spoofing risk because the user-agent can be copied, even when the bot has strong source or documentation support.
- Risk
- Safe
- Recommended Handling
- Depends
Rules and controls
- Robots.txt Snippet
-
User-agent: YandexImageResizer Disallow: /
Relationships
- Operator
- Yandex Checked 2026-05-20
Relationships without an Evidence link are normalized from the canonical directory record. They should not be interpreted as independent proof of physical presence or request origin.