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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Canonical & Indexability Checker

Check canonical tags, meta robots, X-Robots-Tag, and indexability signals to ensure search engines can find your pages.

Updated May 24, 2026

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What is Canonical & Indexability Checker?

The Canonical & Indexability Checker verifies whether search engines can index your page correctly. It checks canonical tags, meta robots directives, X-Robots-Tag headers, HTTP status, and hreflang tags to give you a clear indexability verdict.

Use cases

SEO troubleshooting — find out why a page isn't appearing in search results
Pre-launch checks — verify indexability before publishing new pages
Duplicate content detection — ensure canonical tags correctly point to preferred URLs
International SEO — verify hreflang implementation for multilingual sites
Migration auditing — check that redirected pages maintain proper canonical signals

Key features

Canonical tag detection and URL match verification

Meta robots parsing (noindex, nofollow, etc.)

X-Robots-Tag HTTP header analysis

HTTP status code check for indexability

Hreflang tag detection for international pages

Clear indexability verdict: fully indexable, warnings, or not indexable

Frequently asked questions

It means the canonical URL specified in the <link rel=canonical> tag matches the current page URL. A mismatch suggests the page is telling search engines to index a different URL instead.

Yes — for example, a missing meta description doesn't prevent indexing but hurts SEO. The tool distinguishes between blocking issues (noindex) and warnings (missing tags).

This tool checks server-rendered HTML. If your canonical tag is added via JavaScript, search engines may or may not see it depending on their rendering capabilities.