WordPress or checkout is failing
Collect a manual report from your site or import a sanitized error log. Review measured failures, affected components and the evidence still needed.
Webmaster tools - Check, fix and verify!
Find out why your website is broken.
83 free tools for DNS, email, SSL, redirects, SEO and WordPress. Each check shows what it found, whether it matters and what to change.
- Free tools
- 83
- Accounts needed
- 0
- Private reports kept
- 24 h
Start from the problem
What is going wrong today?
Choose the symptom. Each card lists checks in a useful order, so you can rule causes out and repeat the same measurement after a fix.
DNS changed unexpectedly
Compare saved DNS inventories to find changed records and TTLs, or follow the aliases returned for a public hostname.
Search pages changed after an update
Compare robots rules for specific paths, review sitemap changes or inspect the indexing signals on selected pagination pages.
My site is broken
Start with the website setup report. If your public site and origin disagree, compare both endpoints using your server IP. Origin checks require domain verification.
My page loads slowly
Measure a public page with one screen size and inspect its requests and rendering. If you already have a HAR capture, analyze it locally instead.
I am moving to a new host
Compare the current site with the proposed server before changing DNS. Supply the new public server IP, verify the domain and state the responses you expect.
I need to check a release
Save a checklist in a verified website project, run it manually and compare with an approved baseline. For a single report, use the visual comparison or journey tool.
Is it down or is it me?
Check the site from our server, then look at what your own connection can reach.
The page loads, but the app is broken
Record failed scripts, browser errors and visible content on a verified project page. Compare completed evidence after changing the deployment.
How checks run
Quick answers, deeper evidence, or nothing sent at all
Live checks from our server
- Connect to the public domain or URL you enter.
- Some results are reused for up to ten minutes and show the original time.
- Each result has a link you can share.
Deeper investigations
- Real browser runs, comparisons and audits with a stated scope.
- Inputs and reports are encrypted.
- Private reports are kept for up to 24 hours.
Nothing leaves your device
- Generators and local analyzers process input in your browser.
- Email headers and HAR captures stay on your device.
- Look for “Runs in your browser” on a tool.
Website owners who see our requests in their logs can read how our checker behaves.
Browse
83 tools in 8 groups
- WordPress & WooCommerce, 20 tools Investigate errors, database work, updates and store behavior using evidence from your own site.
- DNS and Domains, 14 tools Look up records, follow a DNS change and inspect domain registration and expiry details.
- Email, 7 tools Check and build MX, SPF, DKIM and DMARC records for mail routing and sender authentication.
- SSL and Security, 5 tools Inspect certificates and the security headers your server sends to browsers.
- HTTP and Redirects, 12 tools Follow redirects, read response headers and check status codes for one URL or many.
- Technical SEO, 12 tools Test crawler rules and review the tags search engines and social sites read from a page.
- Config Generators, 6 tools Build cron schedules, robots.txt files and redirect rules you can paste straight into your server.
- Network and IP, 7 tools See your public IP, look up any IP address, test open ports and check whether a site is down.
Good places to start
Checks for setup, moves, speed and releases
See the A, AAAA, CNAME, MX, TXT, NS, SOA and CAA records for any domain.
Check a certificate's expiry, covered names, chain and supported TLS versions.
Follow a URL through every redirect and spot loops, HTTP downgrades and long chains.
Compare the current site with a proposed server before changing DNS.
Repeat a browser measurement and inspect timing, requests and rendering evidence.
Compare two rendered pages and inspect screenshots and their pixel differences.
My websites
Keep a website project for the next change
Verify a website you manage, save the responses you expect and compare private evidence across manual runs.
Guides
When you need the why, not just the result
- HostingTest a new hosting server before changing DNS
- HTTPCloudflare and your origin return different responses
- PerformanceFind the element and requests behind a slow page
- SSLHTTPS warning after a site move: DNS, certificates and redirects
- HTTPInvestigate a 403, 404, 502 or 504 website response
- Technical SEOA page is crawlable but not indexed: what to check
- EmailSet up email DNS while preserving working mail
- NetworkWhy a TCP port checker reports closed or timed out