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.

Analysis Free · no signup

HTTP Headers Analyzer

Analyze HTTP response headers, security headers, cookies, and redirects.

Updated May 24, 2026

Example output

Pre-computed real result from running HTTP Headers Analyzer against https://krawly.iocaptured 2026-05-13

Surfaces every response header a site sends — security headers, caching directives, server fingerprint, bot-protection signals, and detected CDN.

Server: nginx/1.24.0 (Ubuntu)
HSTS: max-age=31536000; includeSubDomains
X-Frame-Options: SAMEORIGIN
Content-Security-Policy: Not set
Referrer-Policy: strict-origin-when-cross-origin
Cache-Control: s-maxage=31536000

What this tells you: Run this on your own site as a security baseline — a missing HSTS or CSP header is the most common configuration gap and the easiest to fix.

↓ Run the tool below with your own input

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What is HTTP Headers Analyzer?

The HTTP Headers Analyzer inspects HTTP response headers from any URL, focusing on security-critical headers like Content-Security-Policy, HSTS, X-Frame-Options, and more. It helps developers and security professionals ensure proper header configuration.