Krawly.io is a free online platform that provides 150+ 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 150+ 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 150+ 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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Source Code Viewer

View page source with tag statistics. Analyze scripts, styles, meta tags, and HTML structure.

Enter a URL and Source Code Viewer returns the page's raw HTML exactly as the server sends it, plus stats: total tag count, number of script and style tags, and the source size. This is the pre-JavaScript source — what 'View Source' shows and what search engines and social crawlers see first — which makes it ideal for checking meta tags, structured data, and how much a page leans on client-side scripts. It shows the initial HTML, not the DOM after JavaScript runs, so for dynamically rendered content you'll still want browser DevTools.

Updated May 24, 2026

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Quick answer

What is Source Code Viewer?

Source Code Viewer fetches the raw, server-delivered HTML of any webpage and displays it in full, alongside quick statistics about what the page is made of. It counts total tags, tallies <script> and <style> elements, and reports the overall source size, giving you an instant read on how heavy and how script-dependent a page is. This is the HTML the server sends before the browser runs any JavaScript — the same thing you'd get from 'View Source' — which makes it the right lens for SEO checks, competitor research, and debugging what search engines and social crawlers actually receive.

How to use Source Code Viewer

1
Enter the page URL
Paste the full URL of the page whose source you want to inspect. The tool sends a plain request and captures the HTML the server returns.
2
Scan the statistics
Check the tag count, script/style counts, and source size first — they tell you at a glance how large and how script-heavy the page is before you dig into the markup.
3
Read the raw source
Browse the full HTML to confirm meta tags, canonical links, Open Graph data, and JSON-LD structured data are actually present in what the server sends.
4
Copy for deeper analysis
Use one-click copy to pull the whole source into an editor, a diff tool, or an SEO checklist for closer review or comparison over time.

Try it when you need to…

Try it when you need to confirm that meta tags, canonical links, or JSON-LD are present in the HTML a crawler receives
Try it when you suspect a page is client-side rendered and want to see the sparse pre-JavaScript source
Try it when you want to study how a competitor structures its markup and how many scripts it loads

Use cases

HTML debugging — inspect the raw markup a server actually returns
SEO auditing — verify meta tags, canonical links, and JSON-LD are present in the source
Competitor analysis — study how a rival structures its pages and what scripts it loads
Development — confirm a deploy shipped the markup and tags you expected
Crawler-view checks — see the pre-render HTML that Googlebot and social scrapers receive first

Key features

Full raw HTML source display, exactly as delivered by the server

Total tag count for a quick sense of page complexity

Script and style tag counts to gauge client-side dependency

Source size reporting to spot bloated pages

One-click copy of the entire source to your clipboard

Tips & best practices

This shows the pre-JavaScript source, so if the page you view in a browser looks far richer than the source here, the site is client-side rendered — that's a critical SEO signal, since crawlers that don't execute JS may see the same sparse HTML you do.

A high script-tag count with very little visible markup usually means a single-page app (React/Vue/Angular) where the real content is injected at runtime — worth flagging in an SEO audit.

Use it to confirm structured data actually ships: paste the source into Google's Rich Results Test, or search it for 'application/ld+json' to verify your JSON-LD is present in the server response, not just added later by a tag manager.

Compare the source size and tag count against a competitor's to gauge relative page weight and complexity — a leaner source often correlates with faster first paint.

Frequently asked questions

No. Source Code Viewer shows the initial HTML the server sends, before any JavaScript executes. Content that a framework injects into the DOM after load won't appear here. To inspect the fully rendered page, use your browser's DevTools 'Inspect' panel, which reflects the live DOM rather than the original source.

'View Source' and this tool show the raw response from the server — the pre-render HTML. The DevTools Elements panel shows the current DOM, which JavaScript may have heavily modified. For SEO and crawler questions the raw source matters most, because that's what many bots parse first; for debugging live UI, the DOM view is more useful.

Because the visible page is built at runtime by JavaScript. Single-page apps ship a small HTML shell plus scripts, then populate the content client-side. A tiny source with many script tags is the signature of this pattern — and a heads-up that JS-dependent crawlers may see very little content.

The total tag count is a rough proxy for page complexity and DOM size, which affects rendering performance. The script and style counts show how much the page depends on client-side code and external assets — high numbers often mean heavier load times and more render-blocking resources to investigate.

It works on any page that returns publicly accessible HTML. Pages requiring a login, a session, or that block automated requests may return an error or a challenge page instead of their real source. No authenticated or private content is retrieved.

Yes. A webpage's HTML source is sent to every visitor's browser by design and viewing it — via 'View Source' or a tool like this — is completely normal and legal. It only exposes what the server already publishes publicly; it does not access server-side code, databases, or anything protected.