Gpt Crawler
Turn any website into a custom GPT knowledge base with just a URL.
GPT Crawler is a dead-simple open-source tool for turning any website into a custom GPT knowledge base. Ideal for devs who want a quick, free crawler without API fees, but it's manual and lacks cloud features. If you need recurring crawls or non-technical operation, look elsewhere.
- Developers building a one-off custom GPT from documentation or forums
- Teams wanting an internal knowledge base for AI assistants using OpenAI
- Content creators converting their website into a GPT knowledge base
- Quick prototyping of site-specific AI chatbots
- Non-technical users who cannot run CLI tools or Node.js
- Users needing real-time crawling or continuous updates
- Enterprises requiring support, SLAs, or managed hosting
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In short
Gpt Crawler — Turn any website into a custom GPT knowledge base with just a URL. Best for Developers building a one-off custom GPT from documentation or forums, Teams wanting an internal knowledge base for AI assistants using OpenAI, Content creators converting their website into a GPT knowledge base. Free to use.
What's new in Gpt Crawler
Checked 14 days agoAcross the latest 7 updates: 3 feature updates, 2 community discussions and 2 news mentions.
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Viability Score
How likely is Gpt Crawler to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
Last calculated: July 2026
How we score →Key Features
- Crawl websites starting from a given URL
- Follow links matching a configurable URL pattern
- Extract text from specific CSS selectors
- Limit crawl depth (max pages configurable, default 1000)
- Output JSON with page title, URL, and HTML content
- Headless browser engine for JavaScript-rendered content
- Optionally log into sites for non-public content
- Output file directly uploadable to ChatGPT custom GPT
- Output file usable with OpenAI Assistants API
- Open-source (MIT license on GitHub)
- Runs on Node.js (local CLI)
- Configurable via config.ts file
- Real-time crawl progress in terminal
- Works with any public or logged-in website
- No external API or service dependencies
About Gpt Crawler
GPT Crawler is an open-source CLI tool that crawls a website and outputs structured JSON knowledge files, ready to upload to ChatGPT or OpenAI Assistants API. Maintained by Builder.io, it targets developers who want to build custom GPTs or AI assistants with up-to-date, site-specific content. The tool uses a headless browser to handle JavaScript-rendered pages and supports configurable crawl rules via URL matching patterns and CSS selectors. It can optionally log into sites to access non-public content. After crawling, the generated JSON file (title, URL, extracted text per page) can be directly uploaded as a knowledge base in ChatGPT's custom GPT builder or attached to an OpenAI assistant via the API. Key features include headless browser support, configurable max crawl depth (default 1000 pages), CSS selector extraction to isolate content, cookie-based login for private sites, and pattern-based URL filtering. The project is free and open-source on GitHub, with no API keys required. While lightweight and effective for one-off crawls, GPT Crawler lacks scheduling, cloud hosting, or ongoing support. It competes with tools like FireCrawl (API-first, cloud) and Apify (platform with scheduling), but offers a simpler, self-hosted alternative for devs comfortable with CLI and Node.js.
Behind the Verdict
GPT Crawler is a purpose-built, no-nonsense tool for one job: converting a website into a knowledge file for OpenAI's GPTs. We'd reach for this when we need a quick bot trained on docs, a forum, or any public site. The CLI setup is straightforward for anyone comfortable with Node.js, and the headless browser means JavaScript-heavy SPAs aren't a blocker. The selective CSS extraction is a nice touch—keeps junk out of your knowledge base. That said, it's not a continuous solution. There's no scheduling, no cloud dashboard, and no team collaboration. For sites that change often, you'll be re-running the crawler manually. Non-technical users may struggle with the config file and terminal. And while it's free, you're trading money for time: larger crawls (1000+ pages) can be slow, and there's no parallel crawling or incremental updates. Compared to FireCrawl, which offers API-based crawling with JavaScript rendering and cloud hosting, GPT Crawler is less polished but fully self-hosted. FireCrawl's free tier has a 500-page limit per month; GPT Crawler is unlimited but entirely on your machine. Apify is a full platform with scheduling, proxies, and pre-built actors—overkill for a single GPT but better for recurring needs. In practice, GPT Crawler is best as a one-off or occasional tool for devs who already have Node.js and want a quick, free knowledge extraction. It's not for production pipelines or non-devs. The project is mature enough (first release Nov 2023) and stable, but don't expect new features—the repo's last activity was focused on maintenance.
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Use Cases
- Create a custom GPT from your company's documentation for internal Q&A.
- Build an AI assistant for a public website's help center using crawled content.
- Generate a knowledge file from a forum to answer user questions in ChatGPT.
- Scrape a tutorial site to train a custom GPT on specific topics.
- Extract text from a client-side rendered single-page app for AI consumption.
Models Under the Hood
Limitations
- GPT Crawler is a one-time crawling tool; it does not support incremental updates or scheduled crawls.
- It can crawl up to 1000 pages per run by default, and the output is a single JSON file that must be manually uploaded to ChatGPT.
- There is no API, no cloud service, and no built-in automation.
- The tool is limited to text extraction and does not handle images or other binary data.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Resources & Guides
Official links
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