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.

OSINT Free · no signup

Username Availability Checker

Check username availability across 15 popular platforms (GitHub, Twitter, Instagram, etc.).

Updated May 24, 2026

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Discover 160+ free tools for web scraping, SEO analysis, OSINT, and more. 30 free uses every day — no signup required.

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160+ Free Tools No Signup Required JSON / CSV / Excel 30 Uses / Day

What is Username Availability Checker?

Username Availability Checker tests a username across 15 popular platforms to see where it's available or taken.

Use cases

Brand naming
Social media strategy
OSINT
Personal branding

Key features

15 platforms

Parallel checking

Direct profile links

Status summary

Frequently asked questions

Some platforms block automated checks or return ambiguous responses. Suspended accounts may appear 'available'.

Username OSINT

Search for a username across 18+ social platforms — find GitHub, Twitter, Instagram, TikTok, YouTube profiles and more.

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OSINT

Email Footprint

Discover the digital footprint of any email address — Gravatar, GitHub, social profiles, email provider, and disposable email detection.

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OSINT

Owner Finder

Find who owns and operates a website — WHOIS data, contact emails, analytics codes, CMS platform, and social media profiles.

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OSINT

Domain Age

Check how old a domain is via WHOIS. See creation date, expiry, registrar, and name servers.

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SEO

Domains

Generate domain name ideas from a keyword and check DNS availability across popular TLDs.

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Social Media

Char Counter

Check your text against character limits for Twitter, Instagram, TikTok, LinkedIn, YouTube, Facebook, Pinterest, and Threads.

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Looking for something specific? Browse all 158 Krawly tools

Username Availability Checker

Explore More Free Tools

What is Username Availability Checker?

Use cases

Key features

Frequently asked questions

Related tools & similar free utilities

Username OSINT

Email Footprint

Owner Finder

Domain Age

Domains

Char Counter