Free Online Tools

Domain DNS Records Check DNS records of a domain: MX, TXT, A, NS, CNAME, PTR and four more types. → WHOIS / RDAP Lookup Domain owner, registrar and expiry date. → Website Hosting Lookup Which hosting and country a site runs on. → Website Response Time Server response time: DNS, connection, TTFB. → Redirect Checker and Link Unshortener Where a short link leads and the full 301 chain. → Open Port Checker Is the port open: state, response, service. → Proxy Checker Ping, connection speed and anonymity level — results as they arrive. → Internet Speed Test (Speedtest) Internet speed, ping and jitter with a speedometer. →

My IP Your IP address, provider and city. → IP Address Info Country, city, provider and ASN by IP address. → Anonymity Check Are your VPN, proxy and real IP visible. → IP Calculator Subnets, masks and CIDR ranges. →

AI Readiness Audit Seventeen checks: AI crawler access, llms.txt, structured data and technical basics. → Image SEO Checker Alt attributes, file weights, formats and lazy loading. → llms.txt Generator A draft built from your sitemap: title, summary and sections. → llms.txt Validator File structure: heading, summary, sections and link correctness. → Canonical Checker The page canonical, whether it resolves, and conflicts with noindex. → Redirect Chain Checker Every hop from the first URL to the last, with codes and timings. → SERP & Social Preview How the page will look in Google results and when the link is shared. → Schema Validator JSON-LD syntax, required properties per type and logical errors. → Sitemap Validator XML validity, duplicates, redirects and whether the URLs respond. → AI Crawler Checker Whether your robots.txt lets GPTBot, ClaudeBot and PerplexityBot in. → Robots.txt Tester Whether a crawler may fetch a specific URL, and which rule decided it. → Hreflang Checker Language versions of a page: codes, return links and x-default. → Page Indexability Checker Why a page is not getting into Google. → Schema.org Generator JSON-LD structured data for a rich snippet. → Meta Tags and Open Graph Generator Meta tags and Open Graph with a snippet preview. → Meta Tags & Open Graph Title, description, OG and canonical of a page. → 301 Redirect Generator Rules for .htaccess and Nginx: pages, www, HTTPS. → robots.txt Generator A ready robots.txt with presets for your CMS. → sitemap.xml Generator XML sitemap — page crawl and a ready file. → Website Speed Audit Site speed: TTFB, weight, caching and a 0–100 score. → UTM Link Builder A UTM-tagged link for ads and newsletters. →

SSL Certificate Check SSL certificate: issuer and days remaining. → Security Headers Check Security headers: HSTS, CSP, X-Frame-Options. → Website Malware Scanner Malicious code, exposed files and security holes. → Password Generator A strong password of the length you need. → .htpasswd Generator Login and password for Apache .htpasswd. →

Email Checker Whether an address exists: syntax, MX record and the mail server’s answer. → SPF Record Check The domain SPF record with every tag explained. → DMARC Check The domain DMARC policy: p, rua, ruf. → DKIM Lookup The domain DKIM key by selector. → Email Spam Test Spam score, SPF, DKIM and DMARC for your email. → IP Blacklist Check Is the IP in the Spamhaus and SpamCop databases. → SPF Record Generator A correct SPF record for your domain. → DMARC Generator A DMARC policy tailored to your needs. →

Image to WebP Converter Compress photos to WebP right in the browser. → QR Code Generator A QR code for a link, Wi-Fi or a business card. → QR Code Reader Online What is inside a QR code from a photo or camera. → Character and Word Counter Characters, words and title and description length. →

Punycode Converter IDN domains: Punycode to Unicode and back. → Transliteration Ukrainian Latin script by the official standard. → Cron Decoder What a cron expression means in plain words. → JSON Formatter Format, minify and validate JSON. → Text Comparison Find every difference between two text versions. → Developer Utilities MD5, SHA, Base64, Unix time and HEX in one place. →