Free Website & Network Tools
Check SSL, DNS, headers, redirects, uptime, speed and scrape website data.
15 tools in this category.
About Website & Network Tools
Doffl website and network tools help you check, monitor and understand any website. Test SSL certificates, DNS records, HTTP headers, redirects and response times, check whether a site is up, detect the technologies a website uses and capture website screenshots. Web scraping utilities extract metadata, links, images and media from pages, while server tools help with .htaccess rules, SMTP testing and email verification. These tools are made for web developers, site owners, SEO specialists, IT support teams and digital agencies who need fast diagnostics without logging into hosting panels. Enter a domain or URL and get a clear report you can act on, share with your developer or include in a client audit. Run the checks again after changes to confirm everything is fixed.
All website & network tools
- DNS Record Checkerdns · record · lookup · mx
- htaccess Generatorhtaccess · apache · redirect · security
- cURL Command Buildercurl · command · api · request
- API Request Testerapi · rest · http · request
- HTTP Header Checkerhttp · header · security · cors
- Website Metadata Scrapermetadata · scrape · seo · opengraph
- SEO Analyzerseo · analyze · score · optimization
- Broken Link Checkerlinks · broken · check · validate
- Technology Detectortechnology · detect · framework · library
- Website Speed Testspeed · performance · load time · test
- Robots.txt Checkerrobots · txt · crawl · directives
- Sitemap Findersitemap · xml · find · locate
- Mobile Friendly Testmobile · responsive · friendly · test
- HTTP Headers Checkerhttp · headers · security · analyze
- Website Screenshotscreenshot · capture · website · image
Frequently asked questions
How do I check if my SSL certificate is valid?
Enter your domain in the SSL checker to see the certificate issuer, expiry date and any configuration problems.
Can I see what technology a website is built with?
Yes. The technology detector shows frameworks, CMS, analytics and hosting details it can identify from the page.
Is website scraping allowed?
Only scrape pages you have permission to access and follow the site terms of service and robots.txt rules.
Do these tools work for any website?
They work for any public website. Pages behind logins or firewalls may return limited results.