Site Crawler – Your Website Has Secrets. This Tool Finds Them.

You can look at your website every day and never notice the cracks. A broken link buried in a 2019 blog post. A product page that returns a 200 status but has an empty title tag. An entire section of your site that accidentally got blocked by a misconfigured robots.txt. Search engines notice these things instantly, and they punish you silently—dropping pages from the index, wasting crawl budget, and bleeding link equity into 404-shaped holes. The Site Crawler on BlogsLight acts like a hired detective for your domain. Feed it a starting URL, and it fans out across every internal link it can find, building a complete, sortable, exportable spreadsheet of every page’s HTTP status, title tag, meta description, canonical, headings, and more. In the time it takes to drink a coffee, you’ll know more about your site’s health than you did after months of guessing. And because the crawl runs entirely from your browser, no server‑side setup or login is needed—just a URL and a click.

Why a Crawl Is Different from a Sitemap or an Audit

A sitemap tells you what you want search engines to see. A crawl tells you what they actually see. The two rarely match perfectly. The crawler discovers orphan pages—URLs that exist and are reachable via internal links but somehow never made it into your XML sitemap. It also finds the reverse: pages that are in your sitemap but return a 404, a 500, or a redirect chain that wastes crawl budget. It finds pages with duplicate title tags that cannibalise each other, pages with meta descriptions that are 300 characters long or completely missing, and images that lack alt text across an entire product catalogue. The crawler is the reality check. It’s the tool you run before a migration to create a full URL inventory, after a redesign to find dead ends, and every month as a preventative health scan.

Inside the Crawl Engine: What Gets Logged

The tool isn’t just a link follower. It’s a data‑extraction machine. For every HTML page it encounters, the crawler records:

• HTTP status code (200, 301, 302, 404, 500, etc.) and response time in milliseconds. Slow pages are flagged.
• Title tag content and length, with a warning if it’s missing, too short, too long, or duplicated across multiple pages.
• Meta description content and length, with similar duplicate and quality checks.
• Canonical tag value, and a flag if it points to a different URL, a relative path, or a page that itself redirects.
• H1 and H2 headings, including a count so you can spot pages with multiple H1s or no headings at all.
• Internal and external link counts, giving you a rough link‑depth map.
• Content hash for duplicate detection—two pages with identical body text are flagged as potential duplicates.
• Open Graph and Twitter Card tags if the advanced extraction module is enabled, so you can audit social share readiness across the entire site.
• Hreflang tags where present, allowing you to later validate reciprocity with a separate tool.

All of this data lands in a sortable table. Click any column header to find all 404s first. Sort by title length to see every page with a title over 70 characters. Export the whole dataset as CSV, Excel, or JSON, and you’ve got a complete, auditable snapshot of your website’s technical SEO health.

Step‑by‑Step: Run Your First Deep Crawl

1. Enter your start URL. Usually your homepage, but you can crawl a specific subdirectory like /blog/ or /products/ to focus on a section.
2. Configure the scope. Decide how many pages to crawl—start with 500 for a test, then remove the limit for a full site audit. Choose whether to respect robots.txt (leave it on unless you specifically need to see blocked pages). Toggle “Crawl subdomains” if your site spans shop.example.com or help.example.com.
3. Click “Start Crawl.” The live dashboard shows a running tally: URLs discovered, URLs crawled, URLs failed. Each new URL appears in the log with its status code colour‑coded in real time. The crawler throttles requests politely to avoid overloading your server.
4. Filter and sort the results. The table shows every crawled URL. Click the “Status” column header to bring all 404s to the top—those are broken links that need immediate attention. Sort by “Title” to find pages missing title tags. Sort by “Meta Description Length” to find descriptions that are too short or too long.
5. Click any URL to open a detail panel. It shows the full extracted tags, all response headers, and a content snippet. If the page is a redirect, the panel shows the full redirect chain.
6. Export the data. Download as CSV to share with your development team or import into your favourite spreadsheet tool for further analysis.

When to Unleash the Crawler

• Pre‑migration audits: Before moving from oldsite.com to newsite.com, crawl the old site completely. The exported URL list becomes your 301 redirect mapping document. After migration, crawl the new site to verify every old URL resolves correctly and no new 404s have appeared.
• Post‑launch QA: You just redesigned your site or switched themes. Run a crawl within 24 hours. The crawler will find missing pages, broken internal links, pages accidentally noindexed, and title tags that got wiped during the migration.
• Monthly health scans: Schedule a recurring crawl. Over time, you’ll spot trends—pages that are slowing down, title tags that have drifted, internal links that have broken due to content deletions. Early detection prevents ranking drops.
• Competitor architecture analysis: Crawl a competitor’s public site to understand their URL structure, content depth, and internal linking strategy. You can’t see their traffic, but you can see how they organise their information and which pages they consider important enough to link from the homepage.
• Orphan page discovery: Compare the crawler’s URL list with your XML sitemap (generated by the Sitemap Generator). Pages the crawler finds but the sitemap misses are orphans—potentially invisible to search engines.

Connecting the Crawler to Your Full SEO Workflow

The crawl is your diagnostic scan. The rest of the BlogsLight toolkit is the treatment plan. After you’ve identified all broken links, verify each redirect with the Redirect Checker to ensure they’re clean, single‑hop 301s. For the pages that matter most—your top landing pages flagged during the crawl—run individual deep audits with the SEO Analyzer to fix on‑page elements. If the crawl reveals duplicate or thin pages, use the Canonical Generator to consolidate them. For pages that are missing structured data, build the necessary JSON‑LD with the Schema Generator and validate it with the Schema Visualizer. If the crawl surfaces hreflang tags, check their reciprocity with the Hreflang Generator. And finally, once all fixes are applied, generate a clean, error‑free sitemap with the Sitemap Generator that includes only the healthy, canonical URLs the crawl has verified. The Site Crawler doesn’t just find problems—it’s the starting gun for every meaningful technical SEO improvement you’ll make this year.