🤖 Overview

Qualidator.com Bot is a legitimate web crawler operated by Qualidator, a service launched in 2017 that provides automated website quality assessment reports. Its primary purpose is to scan websites for compliance with web standards (HTML5, CSS3), accessibility (WCAG 2.1), performance (PageSpeed metrics), SEO best practices, and broken links. The collected data populates the Qualidator dashboard, which webmasters use to identify and fix issues through detailed, actionable reports. The bot is documented on Qualidator’s official FAQ page and its robots.txt guidelines page.

🌐 Technical Behavior

The bot issues HTTP/HTTPS GET requests at a default rate of 1–2 requests per second, as stated in Qualidator’s official documentation. It respects the Crawl-Delay directive in robots.txt and limits crawl depth to 10 levels to prevent excessive load on small sites. It follows sitemaps if present and sends an Accept-Encoding: gzip header along with an If-Modified-Since header for conditional requests. IP ranges are not publicly published, but the bot originates from Qualidator’s own IP pool, which can be identified via reverse DNS lookups on the qualidator.com domain. Concurrency is limited to a single thread per host to avoid hammering servers.

📋 robots.txt Compliance

Qualidator.com Bot fully honors all Disallow and Crawl-Delay directives defined in robots.txt before every crawl session. This compliance is verified by Qualidator’s own support knowledge base, which states that the bot checks the file at the start of each run and will not access disallowed paths. Webmasters can also set a dedicated User-agent: Qualidator.com Bot rule to fine-tune access.

🔍 Detection Indicators

The primary User-Agent string is Qualidator.com Bot/1.0 (also seen as Qualidator Bot). The bot routinely includes a From header with the email [email protected] for contact purposes. Some requests include a proprietary X-Qualidator-Crawl: yes header. The exact user‑agent string is registered in the official database at useragentstring.com and listed on Qualidator’s own bot identification page.

📊 Data Usage

All collected data is used exclusively to generate site-specific quality reports for the website owner. Qualidator does not use the data for AI model training, advertising, or resale. Reports include aggregated metrics such as HTML validation errors, accessibility violations, page load times, and SEO scores. The service retains raw crawl data for up to 30 days to allow report refreshes, after which it is deleted. No personally identifiable information (PII) is stored.

⚙️ Rate Limiting Policy

Although the bot is not malicious, its scanning can be aggressive when large sites are tested, which is why it is rate‑limited. The recommended policy is to block requests that exceed 10 requests per second per IP or that trigger non‑standard patterns (e.g., rapid repeated access to the same resource) to preserve server resources while still allowing legitimate quality checks.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the bots listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.