What is Crawl4AI used for?

Crawl4AI is an open-source web crawler and scraper that turns any URL into clean Markdown, typed JSON, or search results for LLMs and AI agents. It is a good fit for feeding clean web content into LLMs and AI agents, extracting structured data from websites without selectors, and searching and retrieving ranked results programmatically.

Is Crawl4AI open source?

Yes. Crawl4AI is open source under the Apache-2.0 licence. Its source code is on GitHub at unclecode/crawl4ai and is written mainly in Python.

Yes. Crawl4AI is open source, so the software itself is free to use. A managed cloud version is also available.

Can I self-host Crawl4AI?

Yes. Crawl4AI can be self-hosted on your own server or infrastructure.

What is Crawl4AI an alternative to?

Crawl4AI is an open-source alternative to Diffbot. Other open-source alternatives to Diffbot include Firecrawl, Anakin and Maxun.

Is Crawl4AI actively maintained?

Yes. The most recent commit to Crawl4AI was on 5 October 2026, and the latest release is v0.9.4, published on 23 September 2026. The project has 85k stars on GitHub.

Crawl4AI: open-source alternative to Diffbot

About Crawl4AI

Crawl4AI is an open-source web crawler and scraper designed for LLMs and AI agents. It converts any website into clean, LLM-ready Markdown, typed JSON, or search results. The software can be self-hosted or used via a cloud-hosted API with a key.

The hosted API provides endpoints for scraping, extracting structured data, searching, answering questions, and retrieving Google search results. It is designed to work with AI agents such as Claude Code, Codex, OpenCode, and Cursor.

Key features

Converts any URL into clean Markdown with boilerplate stripped
Extracts typed JSON records from a URL using plain-English instructions
Returns ranked search results as JSON
Provides direct answers with sources (experimental)
Retrieves Google search results as structured data for rank tracking (beta)
Supports queues, jobs, retries, and proxies at scale

Good fit for

Feeding clean web content into LLMs and AI agents
Extracting structured data from websites without selectors
Searching and retrieving ranked results programmatically

Built with: Python tools
Tags: web crawler; scraper; llm; ai agent; markdown; json; open source

Crawl4AI: questions and answers

What is Crawl4AI used for?: Crawl4AI is an open-source web crawler and scraper that turns any URL into clean Markdown, typed JSON, or search results for LLMs and AI agents. It is a good fit for feeding clean web content into LLMs and AI agents, extracting structured data from websites without selectors, and searching and retrieving ranked results programmatically.
Is Crawl4AI open source?: Yes. Crawl4AI is open source under the Apache-2.0 licence. Its source code is on GitHub at unclecode/crawl4ai and is written mainly in Python.
Is Crawl4AI free?: Yes. Crawl4AI is open source, so the software itself is free to use. A managed cloud version is also available.
Can I self-host Crawl4AI?: Yes. Crawl4AI can be self-hosted on your own server or infrastructure.
What is Crawl4AI an alternative to?: Crawl4AI is an open-source alternative to Diffbot. Other open-source alternatives to Diffbot include Firecrawl, Anakin and Maxun.
Is Crawl4AI actively maintained?: Yes. The most recent commit to Crawl4AI was on 5 October 2026, and the latest release is v0.9.4, published on 23 September 2026. The project has 85k stars on GitHub.