Krawly.io is a free online platform that provides 160+ web scraping, SEO analysis, security auditing, and developer tools. It allows users to extract data from websites, analyze SEO performance, check security headers, detect technologies, scrape YouTube data, generate leads, and much more — all without requiring signup or installation.

Is Krawly free to use?

Yes! Krawly is completely free. You get 30 free uses per day without signing up. No credit card required.

Do I need to install anything?

No installation needed. All 160+ tools run directly in your browser with no downloads or setup required. There is also a REST API and a Chrome extension for advanced users.

What data formats can I export?

All tools support JSON, CSV, and Excel (XLS) export. The screenshot tool provides PNG images. API responses are in JSON format.

How does the Krawly API work?

Krawly is a free web-based platform. All 160+ tools are available directly in your browser with no signup required. You get 30 free uses per day.

What types of tools does Krawly offer?

Krawly offers tools in 11 categories: SEO (meta tag validator, heading analyzer, keyword density, core web vitals), Web Scraping (email scraper, table extractor, CSS selector scraper), Security (SSL checker, port scanner, WordPress scanner), OSINT (DNS lookup, WHOIS, IP geolocation), E-Commerce (Amazon scraper, Shopify scraper, price tracker), YouTube (comments scraper, playlist extractor, thumbnail downloader), Developer (JSON formatter, regex tester, JWT decoder), Content (word counter, readability score), Analysis (technology detector, page speed analyzer), Social Media (TikTok analyzer, Instagram analyzer), and Utilities (QR code generator, URL shortener).

Is Krawly a good alternative to SEMrush, Ahrefs, or BuiltWith?

Krawly provides many of the same on-page SEO analysis features as SEMrush and Ahrefs for free, including meta tag validation, heading analysis, keyword density checking, and structured data auditing. For technology detection, it serves as a free alternative to BuiltWith and Wappalyzer. However, Krawly focuses on individual page analysis rather than domain-wide crawling or backlink databases.

Can I use Krawly for lead generation?

Yes. Krawly's Lead Generation tool automatically crawls a website's homepage, about, contact, and team pages to extract email addresses, phone numbers, LinkedIn profiles, Twitter handles, Facebook pages, Instagram accounts, and GitHub links. Results can be exported as JSON, CSV, or Excel.

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Keyword Density Analyzer

Analyze keyword frequency and density of any webpage.

Updated May 24, 2026

Example output

Pre-computed real result from running Keyword Density Analyzer against https://www.bbc.com/newscaptured 2026-05-13

Counts how often each significant word and 2-3 word phrase appears on a page. Surfaces over-optimised keywords and natural topic clusters.

Word count: 2,847
Unique words: 1,103
Top 1-word: news (1.4%)
Top 2-word: bbc news (0.3%)
Top 3-word: watch live news (0.1%)
Stop-words filtered: Yes

What this tells you: Healthy density for a long-form page is 0.5-2% for your primary keyword. Anything above 4% reads as keyword-stuffed and gets quality-filtered by Google.

↓ Run the tool below with your own input

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What is Keyword Density Analyzer?

The Keyword Density Analyzer scans any webpage and calculates the frequency and density of all words and phrases. It helps content creators and SEO professionals understand which keywords dominate a page and optimize content for target keywords.