Yandex
YandexBot
Indexes pages for Yandex Search.
Web searchLink previews
YandexImageResizer
Retrieves images for mobile services.
Operated by Yandex
See your agent traffic PurposeLink previews
HTTP identifierYandexImageResizer
IdentityVerify beyond the name
THE SIGNAL
What this visit tells you
Repeated image retrieval can reflect resizing or delivery work.
Shared URLs
Image responses
Preview fetch errors
Your next move
Check image cache headers and source-file availability.
The technical details
MarkdownHow to identify it
Look for the YandexImageResizer identifier in a request’s User-Agent. This is a name match, not identity verification. Version strings may change.
How to check identity
Confirm reverse DNS under yandex.ru, yandex.net or yandex.com, then resolve that hostname back to the original request IP.
Access and robots.txt
The operator documents robots.txt rules for this identifier.
Optional full-site opt-out. Merge with existing rules only if intended. robots.txt does not secure private content.
User-agent: YandexImageResizer
Disallow: /Seeing 403 or 404 responses?
403 means access was denied; 404 means the resource was not found. Compare the public path, request time, edge security event and origin response to find the cause.
Separate intended restrictions and secret-file probes from pages that should work. A User-Agent name alone does not justify allowing a request.
SourcesReviewed 2026-09-14
Identity and purpose are based on these sources. Analytics interpretation and suggested checks are Apostl guidance.
APOSTL PulseSee YandexImageResizer in context
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