Free Online Web Tools
Essential tools for checking domains, looking up DNS records, finding your public IP, and shortening URLs. Fast, free, and no account required.
The Domain Checker makes live API requests to retrieve WHOIS and DNS data — that data stays in your browser session and is never stored. Looking for SEO-specific tools? See the SEO Tools category.
Free Online Web Tools
43+ free web tools — domain checker, DNS lookup, SSL, redirect tracer, CORS tester, speed test, and IP address. Some tools make live requests to the URL you enter.
Browse Web Tools
All Web Tools (43)
Domain Tools(14)
Disposable Email Checker
Check if an email address uses a disposable or temporary email service. Instant check against 50+ known providers.
DMARC Generator
Generate DMARC DNS TXT records. Set policy, reporting addresses, and alignment. Copy for your DNS settings.
DNS Lookup
Check A, AAAA, CNAME, MX, NS, TXT, SOA records for any domain. Uses Google Public DNS.
Domain Age Checker
Find out how old any domain is. See the exact registration date, age in years/months/days, registrar, and expiry date.
Domain Expiry Checker
Check when any domain expires and how many days remain. Get warnings for domains expiring soon. Free, instant.
Domain Info Checker
Check WHOIS, DNS records, SSL status and HTTP info for any domain. Instant results.
Email Header Analyzer
Paste raw email headers to extract routing info, SPF/DKIM/DMARC results, received chain, and all header fields.
Email Validator
Validate email addresses with format checking and MX record verification. Batch validate up to 20 emails.
Hosting Checker
Find out where any website is hosted. Detects AWS, Google Cloud, Cloudflare, Azure, DigitalOcean, and more. Free, instant.
Reverse IP Lookup
Find the hostname, ISP, city, country, and timezone for any IP address or domain. Free instant reverse IP lookup.
SPF Record Generator
Generate SPF TXT DNS records for your domain. Add include mechanisms, IP addresses, and policy.
SSL Certificate Checker
Check if a domain has a valid SSL certificate and HTTPS connectivity. Verify HTTP-to-HTTPS redirects instantly.
Subdomain Finder
Discover active subdomains for any domain by probing common prefixes via DNS. See IP addresses for each found subdomain.
WHOIS Lookup
Look up WHOIS registration data for any domain. See registrar, creation date, expiry date, nameservers, and status. Free, instant.
Network Tools(13)
Blacklist Checker
Check if an IP address or domain is listed on email blacklists. Checks Spamhaus, SpamCop, Barracuda, and more. Free.
DMARC Checker
Check the DMARC record for any domain. Validate policy, coverage, and reporting configuration. Free, instant.
DNS Propagation Checker
Check DNS propagation status for any domain across multiple DNS resolvers. Verify A, CNAME, MX, NS, and TXT records. Free.
GeoIP Lookup
Look up the country, city, ISP, timezone, and coordinates for any IP address or domain. Free, instant.
Internet Speed Test
Test your internet download speed, upload speed, and ping latency using Cloudflare's global network.
MX Lookup
Look up MX records for any domain to see which mail servers handle its email. Shows priority, hostname, and TTL. Free.
My IP Address
Find your public IP address, location, ISP, timezone, and coordinates instantly.
NS Lookup
Find the authoritative nameservers for any domain. Identify the DNS provider and check for recent changes. Free.
Ping Test
Test latency to any domain. See average, min, max ping times and packet loss. Free browser-based ping test.
Port Checker
Check if HTTP or HTTPS ports are open on any hostname or IP address. Check common ports with one click. Free.
SPF Record Checker
Check and validate SPF records for any domain. Analyze includes, IP ranges, policy, and detect misconfigurations. Free.
Traceroute Tool
Trace the network route to any domain or IP address. See each hop and latency. Browser-based traceroute. Free.
TXT Record Lookup
Check TXT records for any domain. Automatically identifies SPF, DKIM, DMARC, and domain verification records. Free.
Website Tools(7)
CORS Tester
Test cross-origin resource sharing headers for any API. Debug Access-Control-Allow-Origin errors instantly.
User Agent Checker
Detect your browser, OS, device type, and rendering engine from your user agent string. Analyze any custom UA.
Website Availability Checker
Check DNS resolution, HTTPS availability, HTTP response, and response time for any website. Instant availability test.
Website Screenshot Generator
Generate a full-page screenshot of any website instantly. Enter a URL and capture it as an image. Free, no sign-up.
Website Speed Test
Check server response time, HTTP status, and page size for any URL. Averages 3 runs for accurate results.
Website Technology Checker
Detect the CMS, JavaScript frameworks, analytics, CDN, and other technologies used by any website. Free, instant.
Website Uptime Checker
Check if any website is currently up or down. See HTTP status code and response time instantly. Free.
URL Tools(8)
Bulk Redirect Checker
Check redirect chains for multiple URLs at once. See final destination URLs and HTTP status codes. Free, instant.
Link Extractor
Extract all internal and external links from any webpage. Filter by type and copy URLs. SEO link audit tool. Free.
URL Extractor
Extract all HTTP and HTTPS URLs from any text, HTML, or document. Removes duplicates. Copy all with one click. Free.
URL Opener
Open multiple URLs in new browser tabs simultaneously. Paste a list, set a delay, and open all with one click. Free.
URL Parser
Break any URL into its components: protocol, hostname, path, query parameters, and hash fragment. Free, browser-based.
URL Shortener
Shorten long URLs instantly and copy compact links for sharing.
UTM Builder
Build UTM tracking URLs for Google Analytics campaigns. Add utm_source, medium, campaign, term, and content. Free.
UTM Parser
Decode UTM parameters from any tracking URL. See utm_source, utm_medium, utm_campaign, and other query params. Free.
Tool Guides
Domain Info Checker
Enter any domain to see WHOIS registration data (registrar, creation date, expiry date), all DNS records (A, AAAA, MX, NS, TXT, CNAME), SSL certificate details, and HTTP status codes. Useful for due diligence before purchasing a domain, debugging DNS propagation, and verifying SSL setup.
Meta Tag Generator
Fill in your page title, description, URL, and social image to generate a complete set of meta tags. Covers SEO (title, description, robots), Open Graph (for Facebook, LinkedIn), and Twitter Cards. Copy the output and paste into your HTML head or CMS.
Robots.txt Generator
Create a valid robots.txt file specifying which crawlers can access which parts of your site. Upload the output to your domain root (e.g. https://yourdomain.com/robots.txt) and Google will find it automatically.
Keyword Density Checker
Paste your content to see which words and phrases appear most frequently. Identifies potential keyword stuffing and highlights terms that might be underused. Useful when auditing existing content for SEO.
Guides & Use Cases
Frequently Asked Questions
Does the Domain Checker access real WHOIS and DNS data?
Yes. The Domain Checker makes live queries to a WHOIS/DNS API to retrieve registration data, DNS records (A, MX, NS, TXT, CNAME), SSL certificate status, and HTTP response information for any domain you enter.
What meta tags does the Meta Tag Generator produce?
It generates the standard SEO meta tags (title, description, robots, canonical), Open Graph tags (og:title, og:description, og:image, og:type, og:url), and Twitter Card tags (twitter:card, twitter:title, twitter:description, twitter:image). Copy the HTML and paste it directly into your page's head section.
What does keyword density mean for SEO?
Keyword density is the percentage of times a specific word or phrase appears relative to the total word count. It is a basic content analysis metric. Modern SEO focuses less on exact keyword density and more on topical coverage and semantic relevance, but analyzing density is still useful for avoiding keyword stuffing and identifying underused terms.
Can I use the sitemap generator for any website?
Yes. Enter your URLs, set priority and change frequency for each, and download a valid XML sitemap ready to submit to Google Search Console. For large sites with thousands of pages, you'll need a crawler-based sitemap tool.
What robots.txt rules can I create?
The Robots.txt Generator supports user-agent targeting (all crawlers or specific ones like Googlebot), allow/disallow rules for specific paths, crawl-delay settings, and sitemap URL declarations. The output is a valid robots.txt ready to upload to your domain root.