Thundercrawl
Be the source AI trusts
SubscriptionSEO203 impressions#116 of its week
More SEO tools →74 free dev tools →
Thundercrawl generates LLMs.txt files for websites to improve AI search discoverability and SEO.
- for
- Web developers and site owners who want AI-ready content for better search visibility.
- pricing
- freemium · free trial
Key features
- LLMs.txt Generator — Creates .txt files that make any website ready for large language model indexing.
- Free Sample Crawl — Allows a test run on up to 5 pages, 10 blogs, and 10 products at no cost.
- Full Site Crawl — Scans the entire site to produce comprehensive LLMs.txt output.
- Single Page Mode — Generates LLMs.txt for a specific page on demand.
- Advanced Options — Provides configurable settings for customized crawling and output.
- Premium Plans — Offers paid tiers for larger sites and higher crawl limits.
Use cases
- Increase referral traffic from AI-driven search engines
- Future-proof SEO by providing LLM-compatible content
- Boost visibility of product and blog pages for AI assistants
Thundercrawl vs alternatives
 Thundercrawl |  AITDK SEO Extension |  Code Driven SEO |  Telescope | .png1694714380639.png?width=64) IndexGuru | |
|---|---|---|---|---|---|
| Best for | LLMs.txt generation for SEO | All-in-one SEO extension | Developer-centric SEO advice | Comprehensive SEO toolkit | Fast page indexing for SEO |
| Pricing | Freemium | Free | One time fee | Subscription | Subscription |
| DevHunt upvotes | 0 | 26 | 9 | 6 | 3 |
| Launched | Jan 2025 | Jun 2024 | Jul 2024 | Jan 2025 | Jan 2023 |
- Thundercrawl vs AITDK SEO Extension: Focuses on broader SEO analysis and keyword tools, not LLMs.txt generation
- Thundercrawl vs Code Driven SEO: Targets developers who dislike marketing, offering SEO guidance rather than file generation
- Thundercrawl vs Telescope: Provides a full SEO toolkit at low price, but does not create LLMs.txt files
- Thundercrawl vs IndexGuru: Optimizes indexing speed and ranking, without producing LLMs.txt outputs
Thundercrawl FAQ
What does the free test include?+
It generates LLMs.txt for up to 5 pages, 10 blogs, and 10 products so you can see the impact before upgrading.
Can I crawl only a single page?+
Yes, the Single Page mode lets you generate LLMs.txt for any individual URL.
What is the difference between Full Site Crawl and Single Page?+
Full Site Crawl processes the entire website, while Single Page focuses on one URL.
Are there limits on the free version?+
The free sample is limited to the page/blog/product counts mentioned; larger sites require a premium plan.
How do I upgrade to a premium plan?+
Enter your website URL, choose the desired processing mode, and select a premium plan to increase crawl limits.
Summarized by DevHunt from thundercrawl.com · Sep 29, 2026. Details may change; check the official site.
