Safe Data Scrapers

imgproxy

Operated by Open Source

Quick Facts

User-Agent:
imgproxy
Category:
Data Scrapers
Operator:
Open Source
Safety:
Safe
Blocking Impact:
Low - No SEO ranking impact
SEO Impact Score:
2/10

What is imgproxy?

A fast and secure standalone server for resizing and converting remote images. Often used as a proxy.

A fast and secure standalone server for resizing and converting remote images. Often used as a proxy. imgproxy is a data aggregation crawler. Unlike search bots or AI crawlers, its purpose is typically to collect content for private datasets, price monitoring, or research. Blocking imgproxy via robots.txt or at the server level has NO negative SEO impact. If you see excessive crawl volume from this bot in your logs, a hard block is recommended.

What happens if you block imgproxy?

✅ **Minimal Impact** - Blocking imgproxy has no meaningful effect on your search engine rankings or organic traffic.
Generally safe to allow; provides legitimate crawling value.

How to block imgproxy with robots.txt

<code>User-agent: imgproxy</code> - Matching is case-insensitive. Robots.txt is fetched from the root of each subdomain separately.

Block completely (robots.txt)
User-agent: imgproxy Disallow: /
Allow all (robots.txt)
User-agent: imgproxy Allow: /
Block private only (robots.txt)
User-agent: imgproxy Disallow: /private/ Disallow: /api/ Disallow: /admin/ Allow: /
Nginx server block
# Nginx: Hard-block imgproxy if ($http_user_agent ~* "imgproxy") { return 403 "Bot blocked"; }
Apache .htaccess
# Apache: Hard-block imgproxy SetEnvIfNoCase User-Agent "imgproxy" bad_bot Order Allow,Deny Allow from all Deny from env=bad_bot
Meta robots tag
<meta name="robots" content="noindex, nofollow">
X-Robots-Tag header
X-Robots-Tag: noindex, nofollow

Is imgproxy safe to allow?

Yes, imgproxy is a **safe and legitimate** crawler. It is operated by Open Source, which publicly documents its crawler at an official URL and follows the Robots Exclusion Protocol (RFC 9309). The user-agent string imgproxy is verifiable via reverse-DNS lookup on the crawling IP addresses. You can safely allow it unless you have a specific reason to block (e.g., AI training opt-out or SEO tool visibility).
Verify by reverse-DNS lookup: legitimate imgproxy requests resolve to open-source's domain.

What does imgproxy do?

Understanding imgproxy's purpose helps you decide whether to allow or block it.

  • Extracts content, prices, or data from websites
  • May be used for competitive intelligence
  • Often operates without explicit permission
  • Can increase server load and bandwidth usage
  • May violate terms of service or copyright

Frequently Asked Questions

What is the official user-agent string for imgproxy?
The official user-agent string for imgproxy is: imgproxy. This is the exact string you must use in robots.txt, Nginx, Apache, or Cloudflare firewall rules to target this bot. User-agent matching in robots.txt is case-insensitive, but the string must be spelled correctly. You can verify that a request genuinely comes from imgproxy by performing a reverse-DNS lookup on the source IP - legitimate bots resolve back to their operator's domain.
Is imgproxy safe?
Yes, imgproxy is a **safe and legitimate** crawler. It is operated by Open Source, which publicly documents its crawler at an official URL and follows the Robots Exclusion Protocol (RFC 9309). The user-agent string imgproxy is verifiable via reverse-DNS lookup on the crawling IP addresses. You can safely allow it unless you have a specific reason to block (e.g., AI training opt-out or SEO tool visibility).
Will blocking imgproxy hurt my SEO?
✅ **Minimal Impact** - Blocking imgproxy has no meaningful effect on your search engine rankings or organic traffic.
How do I block imgproxy in robots.txt?
Add the following lines to your /robots.txt file: 
User-agent: imgproxy
Disallow: /
This instructs imgproxy not to crawl any path on your site. The Disallow: / directive covers the entire domain including subfolders. To only block specific sections, replace / with the path (e.g., Disallow: /blog/). Note: robots.txt is publicly readable - any bot or human can inspect it at yourdomain.com/robots.txt.
Does imgproxy respect robots.txt?
Yes - imgproxy is a well-behaved bot operated by Open Source. It fetches and parses /robots.txt before crawling any page, following RFC 9309.
How do I verify if imgproxy is crawling my site?
Search your web server access logs for the string imgproxy (case-insensitive grep: grep -i "imgproxy" /var/log/nginx/access.log). You can also check Google Search Console → Coverage → Crawl Stats for Googlebot variants. For imgproxy specifically, filter by user-agent in your log analysis tool (GoAccess, AWStats, etc.).
What is the crawl frequency of imgproxy?
imgproxy crawls at a moderate rate. If you notice excessive traffic in your logs, you can add a Crawl-delay directive: 
User-agent: imgproxy
Crawl-delay: 10
(10 second delay between requests).
Can I block imgproxy from specific pages only?
Yes. Instead of a global Disallow: / you can restrict imgproxy to specific paths: 
User-agent: imgproxy
Disallow: /private/
Disallow: /staging/
Allow: /
This allows imgproxy everywhere except the listed paths. Path matching in robots.txt uses prefix matching - Disallow: /private/ blocks /private/page.html but NOT /public/private/.
Is imgproxy causing high server load?
If imgproxy is generating excessive requests, you can: 1. Add Crawl-delay: 30 below the User-agent directive in robots.txt. 2. Rate-limit the user-agent via Nginx's limit_req_zone or Apache's mod_ratelimit. 3. Block it outright at Cloudflare WAF with rule: http.user_agent contains "imgproxy". 4. Use fail2ban to auto-block IPs exceeding request thresholds.

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