Quick Answer: A free website crawler online checks a site from one starting URL, extracts crawlable URLs, and returns useful data such as internal links, page titles, status codes, and export files. Word Spinner's free Website URL Extractor & Crawler is best for quick URL inventories before deeper SEO work.
A website crawler online gives you a fast map of what a visitor or search bot can reach. Use a website crawler online before fixing broken links, comparing a sitemap, moving pages, or handing a URL list to a developer.
What is a website crawler online?
A website crawler online is a browser-based tool that visits a starting URL, follows links, and lists the pages it finds. It helps you crawl a website for URLs without installing desktop software.
Google uses the word crawler for a program that automatically discovers and scans websites. According to Google's crawler documentation, crawlers are also called robots or spiders, and Googlebot is one example used for Google Search.
A website crawler online does not replace Googlebot. It gives you a smaller working view of your site so you can find missing pages, broken URLs, redirects, and weak internal-link paths before they become search problems.
For small websites, a website crawler online works best as a URL inventory tool, not a complete technical SEO platform. Start from the homepage, follow internal links, export the discovered URLs, then compare that crawl list against your sitemap and navigation. The useful output is not just the number of pages found.
The useful output is a fix queue: missing pages, redirect hops, weak internal links, stale sitemap URLs, and important pages that sit too many clicks from the homepage. That makes a free website crawler online a good first check before a migration, content cleanup, or developer handoff because it turns scattered site structure problems into a list you can sort, assign, and verify.
When should you crawl a website for URLs?
Crawl your site when you need a clean URL inventory. That usually happens before an SEO audit, a redesign, a migration, a content cleanup, or a sitemap update.
Small-site owners often wait until traffic drops. A better habit is to run a quick URL crawl after publishing a batch of pages, changing menus, deleting old posts, or editing redirects.
Here is the practical difference between common URL discovery methods:
| Method | What it finds | Best use | Limitation |
|---|---|---|---|
| Website crawler online | URLs reachable from a starting page | Fast crawl checks and internal-link review | May miss orphan pages with no internal links |
| Sitemap extractor | URLs listed in XML or text sitemaps | Comparing submitted URLs with crawlable URLs | Only as accurate as the sitemap |
| Server logs | URLs requested by real bots and users | Advanced crawl-budget and bot analysis | Needs hosting access and cleanup |
| Manual page checks | Known pages you open one by one | Spot-checking priority pages | Slow and easy to miss hidden issues |
Use the free Sitemap URL Extractor alongside a website crawler online when you want to compare what your sitemap lists against what your navigation actually exposes.
How do you use a free online website crawler?
Start with the homepage or the most important section URL. The free Website URL Extractor & Crawler crawls up to 500 links deep, shows internal links, page titles, status codes, and exports CSV or TXT files.
- Paste the full starting URL, including
https://. - Choose a crawl depth that matches the job. Depth 1 checks direct links, while deeper crawls follow links from discovered pages.
- Keep external-link crawling off unless you need to map outbound references.
- Run the crawl and scan the result table.
- Export CSV when you want status codes, page titles, depth, and file size. Export TXT when you only need a URL list.
With a website crawler online, the fastest workflow is crawl, export, sort, fix. Sort by status code first, then by depth, then by URL path. That order puts broken or blocked pages near the top while showing whether important pages sit too far from the homepage.
What should you check in the crawl results?
When you use a website crawler online, check crawl results for four things first: failed URLs, unexpected redirects, missing titles, and important pages that sit too deep. Those issues usually point to fixes you can make without a full technical audit.
Status codes matter because they tell you whether a page responded cleanly. A 200 status means the URL loaded. A 301 or 302 points to a redirect.
A 404 means the page is missing, and a 5xx status points to a server-side failure.
Use this website crawler online checklist when reviewing an exported crawl:
| Crawler finding | What it means | First fix | Helpful free tool |
|---|---|---|---|
| 404 URLs | Links point to missing pages | Update the source link or add a relevant redirect | Internal Link Checker |
| Long redirect chains | Users and bots pass through extra hops | Link directly to the final destination | Website URL Extractor & Crawler |
| Missing page titles | Pages may be thin, duplicated, or poorly templated | Add a clear unique title | Website URL Extractor & Crawler |
| Deep important URLs | Key pages take too many clicks to reach | Add internal links from relevant hub pages | Internal Link Checker |
| Sitemap-only URLs | A page exists in the sitemap but not in the crawl | Add internal links or remove stale sitemap entries | Sitemap URL Extractor |
"A useful crawl turns unknown URLs into a short fix queue."
How do you turn extracted URLs into an SEO fix list?
Turn the crawl export into a fix list by grouping URLs by issue type. Do not hand a raw CSV to a developer or content editor. Give them a sorted queue with the exact page, problem, and next action.
Start with broken internal links because they create poor user paths and waste crawl attention. Then fix redirect chains, missing titles, duplicate-looking paths, and pages that should appear in your sitemap but do not.
A strong small-site fix list looks like this:
- URL with the problem.
- Source page where the bad link appears.
- Issue type, such as 404, redirect, missing title, blocked path, or sitemap mismatch.
- Recommended action.
- Owner, such as content, development, or SEO.
- Priority, based on traffic value and page importance.
If you want more free SEO utilities after the crawl, the free SEO tools with no signup roundup shows related checks that do not require an account.
When do you need a full SEO crawler instead?
Use a full SEO crawler when the site is large, JavaScript-heavy, or needs deeper technical checks. A website crawler online is best for fast URL extraction and surface-level cleanup.
According to Screaming Frog's SEO Spider page, its desktop crawler's free version crawls up to 500 URLs, while the paid license removes that crawl limit and adds advanced options such as JavaScript rendering, crawl configuration, saving crawls, and integrations.
Sitemaps also have size limits. According to Sitemaps.org, each sitemap file can list no more than 50,000 URLs and must stay under 50MB uncompressed. That matters when your crawl export and sitemap list no longer fit into one simple file.
Use this rule: a website crawler online is enough when you need a quick inventory, broken-link review, or sitemap comparison for a small site. Move to a full SEO crawler when you need rendering, crawl rules, scheduled audits, duplicate-content checks, analytics connections, or reports across thousands of URLs.
If your crawl creates keyword groups for content cleanup, pair it with the free keyword clustering workflow so each URL has a clear search intent before you rewrite or merge pages.
FAQ
What is the best free website crawler online?
The best free website crawler online for a quick small-site URL check is the Website URL Extractor & Crawler from Word Spinner Free Tools. It runs in the browser, extracts crawlable URLs, shows status codes and page titles, and lets you export results as CSV or TXT.
Choose a desktop SEO crawler when you need advanced rendering, saved crawl files, custom crawl rules, or large scheduled audits. For a fast URL inventory, a free website crawler online is usually the simpler starting point.
Can a website crawler find every page on my site?
No website crawler can guarantee it will find every page. A crawler follows links from the starting URL, so it can miss orphan pages, blocked URLs, pages hidden behind forms, and pages only listed in a sitemap.
Compare the crawl export with your sitemap export to catch gaps. If a valuable page appears in the sitemap but not in the crawl, add relevant internal links so users and crawlers can reach it.
What is the difference between crawling and scraping?
Crawling discovers URLs by following links across a site. Scraping extracts specific content or data from pages, such as text, tables, prices, or metadata.
For SEO cleanup, start with crawling because you need to know which URLs exist and how they connect. Scraping becomes useful later when you need to extract page-level fields at scale.
How many URLs should I check at once?
Check enough URLs to answer the job without overloading the site or burying yourself in noise. For small business sites, a crawl of a few hundred URLs often finds the broken links, redirects, and missing titles that matter first.
If your site has thousands of URLs, split the work by section or use a full SEO crawler with saved projects and configuration controls. Always rerun a smaller crawl after fixes to confirm the important paths now work.
Should I crawl a website before submitting a sitemap?
Yes, crawl the website before submitting or resubmitting a sitemap. The crawl shows whether your important sitemap URLs are reachable through internal links and whether old broken pages still appear in navigation.
After the crawl, export your sitemap URLs and compare the two lists. Keep URLs that should rank, remove stale entries, and add internal links to useful pages that crawlers cannot reach from normal navigation.