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.

Utilities Free · no signup

Email Validator

Validate email addresses — check format, MX records, disposable/free provider detection, and deliverability score.

Updated May 24, 2026

Example output

Pre-computed real result from running Email Validator against support@stripe.comcaptured 2026-05-13

Three checks on any email address — RFC 5322 syntax, MX-record presence on the domain, and disposable / free-provider classification.

Syntax valid: Yes
Domain MX: Google Workspace (5 servers)
Disposable: No
Free provider: No (corporate domain)
Role account: Yes (support@)
Deliverability score: 95 / 100

What this tells you: Role accounts (support@, info@, contact@) are valid for outreach but generally have lower open rates than personal addresses. Krawly's [Email Footprint](/tool/email-footprint) helps separate the two.

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What is Email Validator?

The Email Validator checks email addresses for format correctness, domain validity, MX record existence, and whether the address belongs to a disposable or free email provider. It returns a deliverability score from 0 to 100 to help you assess email quality.

Use cases

Email list cleaning — validate addresses before sending campaigns to reduce bounce rates
Lead qualification — verify that contact emails are real and deliverable
Sign-up form validation — check emails in real-time before accepting registrations
Fraud prevention — detect disposable and temporary email addresses
CRM data hygiene — clean up existing contact databases

Key features

RFC 5322 email format validation

DNS MX record lookup to verify domain can receive email

Disposable email provider detection (Mailinator, Guerrilla Mail, etc.)

Free email provider identification (Gmail, Yahoo, Outlook, etc.)

Deliverability score (0–100) with detailed breakdown

No API key required — completely free to use

Frequently asked questions

No, the tool performs DNS-level validation (format check, MX record lookup, disposable detection). It does not send test emails.

The score reflects format validity, DNS health, and provider type. It's a good indicator but cannot guarantee delivery since server-side rules vary.

Disposable emails are temporary addresses from services like Mailinator, Guerrilla Mail, and Tempail. They're commonly used to bypass sign-up requirements.