Website Crawler

Who crawls websites to text

• RAG and LLM training data

  Crawl an entire docs site or knowledge base into clean Markdown chunks ready to feed into a vector store or fine-tuning pipeline.

• Documentation site to Markdown

  Migrate a hosted documentation site to Markdown files for a new platform, static-site generator, or git-based workflow.

• Content audits at scale

  Pull every blog post or article from a competitor's site to analyze topic depth, content patterns, and missed angles.

• Archival snapshots

  Snapshot a website's full content for archival, citation, or before-and-after comparison after a redesign.

• Search index seeding

  Crawl a site once to seed a custom search engine, knowledge graph, or content recommendation system.

How to crawl a website to clean Markdown

1. 1
   Paste the starting URL

   The crawler begins from this URL. Usually a docs root, blog index, or sitemap entry point.

2. 2
   Set crawl depth and limits

   Choose how deep to crawl from the starting URL and how many total pages to fetch. Defaults are sensible for most sites.

3. 3
   Run the crawl

   SubExtract walks internal links from the starting URL, extracting each page's main content as Markdown. Progress streams live.

4. 4
   Download the bundle

   Get all crawled pages as a single bundled file — one Markdown document per URL, with the source URL preserved as a header.

Frequently asked questions