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Free Webmaster Tools

DNS lookups, SEO analysis, HTML & CSS utilities, and more. All free, no signup required.

45+ Tools 100% Free No Account Needed

DNS Report

Run a full DNS health diagnostic.

Up or Down?

Check if a website is up right now.

WHOIS Lookup

Look up domain ownership details.

DNS & Network Tools

23 tools
What's My IP
See your public IP address, reverse DNS, and connection details instantly.
DNS Health Report
Full DNS diagnostic: nameservers, SOA, MX, A/AAAA, SPF, DMARC, and health checks.
W
WHOIS Lookup
Look up domain registration and ownership information for any IP address or domain.
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Website Speed Test
Test how fast a website loads and measure server response time.
Website Status Checker
Check if any website is up or down for everyone, or just you.
Spam Blacklist Checker
Check if an IP address or domain is listed on major DNS-based blacklists (RBL/DNSBL) used by mail servers to filter spam.
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IP Lookup
Look up detailed information for any IP address including location, ISP, and network details.
SPF Record Lookup
Look up and analyze SPF records. Check authorized senders and DNS lookup limits.
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DKIM Record Lookup
Look up DKIM signing keys and auto-detect selectors for any domain.
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DMARC Record Lookup
Check DMARC policy, reporting config, and email authentication alignment.
SPF Record Generator
Build an SPF record by selecting your email providers and enforcement policy.
DKIM Record Generator
Format a DKIM DNS record from your email provider's public key.
DMARC Record Generator
Build a DMARC policy with reporting, alignment, and enforcement settings.
Domain Name Checker
Check if a domain name is available for registration.
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SSL Certificate Checker
Inspect a site's SSL/TLS cert: expiry, issuer, chain, hostname match, and grade.
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DNS Propagation Checker
Compare DNS answers across Google, Cloudflare, Quad9, OpenDNS, and AdGuard.
Subnet Calculator
CIDR math: network, broadcast, host range, masks, for IPv4 and IPv6.
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MX & Blacklist Check
List a domain's mail servers and check each one against major blacklists.
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Email Security (MTA-STS/BIMI)
Check MTA-STS TLS enforcement, TLS-RPT reporting, and BIMI brand-logo records.
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CAA Record Generator
Control which Certificate Authorities may issue SSL certs for your domain.
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DMARC Report Analyzer
Turn the XML DMARC aggregate reports your mailbox receives into a plain summary.
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Mail Deliverability Tester
Send one email, get a 0-10 inbox score with SPF, DKIM, DMARC, and blacklist fixes.

SEO & Analysis Tools

12 tools

HTML Tools

5 tools

CSS Tools

3 tools

Miscellaneous Tools

6 tools

About These Webmaster Tools

Ultra Web Hosting has provided these free webmaster tools since 2002 as a resource for web developers, site owners, and SEO professionals. Every tool runs directly on our servers. There is nothing to install, no account to create, and no limit on how many times you can use them. Whether you are debugging a DNS issue, optimizing your HTML, checking your search engine rankings, or building CSS from scratch, these tools are here to help.

The collection spans five categories: DNS and network utilities for investigating domains, IPs, and server connectivity; SEO and analysis tools for auditing your on-page optimization and search visibility; HTML tools for validating, optimizing, and generating markup; CSS tools for building and validating stylesheets; and miscellaneous utilities like color pickers, cron generators, and browser diagnostics. Each tool is designed to do one thing well and give you results immediately.

Why Webmaster Tools Matter

Running a website involves more than just publishing content. Behind every successful site is ongoing technical maintenance: making sure your HTML is valid, your server is responding correctly, your pages load quickly, and search engines can find and index your content. The right tools make the difference between guessing at problems and diagnosing them precisely.

DNS tools help you verify that your domain is resolving correctly, identify where your server is located, and check whether your IP has ended up on any spam blacklists. SEO tools let you see your site the way search engines see it, from the meta tags they read to the keywords they extract to the position your pages hold in search results. HTML and CSS tools catch coding errors before your visitors do, and code generators save hours of manual work on repetitive tasks.

These tools are especially valuable when something goes wrong. If your email is not being delivered, the spam blacklist checker can tell you why. If your site is loading slowly, the speed test gives you hard numbers. If Google is not indexing your pages, the spider view and meta tag viewer can reveal what the crawler is actually seeing. Every tool in this collection exists to answer a specific question quickly and accurately.

Frequently Asked Questions

  • Are these webmaster tools free to use?
    Yes, every tool on this site is completely free with no registration, no account, and no usage limits. Use them as often as you need for any project.
  • Do I need to be an Ultra Web Hosting customer?
    Not at all. These tools are available to everyone regardless of where your website is hosted. We provide them as a free resource for the webmaster community.
  • Is my data collected or stored?
    No. These tools process your requests in real time and do not log or store the URLs, IPs, or code you enter. Your data is not saved or shared.
  • A tool isn't working. What should I do?
    Some tools depend on external services that may occasionally be unavailable. If a tool isn't working as expected, please contact us through the Ultra Web Hosting support page and we'll look into it.

Need Reliable Web Hosting?

These free tools are brought to you by Ultra Web Hosting, offering fast, secure shared and reseller hosting with 24/7 expert support since 2002.

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