How do I install the Web Tools [[TOC]](#anger-table-of-contents) skill?

Run npx skillmds@latest add tools-only/web-tools-and-nbsp-toc-anger-table-of-contents in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Web Tools [[TOC]](#anger-table-of-contents) safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Web Tools [[TOC]](#anger-table-of-contents)?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Web Tools [[TOC]](#anger-table-of-contents) free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Web Tools [[TOC]](#anger-table-of-contents)?

tools-only (@tools-only) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Web Tools  [[TOC]](#anger-table-of-contents) by tools-only

Name: Web Tools [[TOC]](#anger-table-of-contents)
Author: tools-only

Web Tools  [[TOC]](#anger-table-of-contents)

   SSL/TLS Capabilities of Your Browser - test your browser's SSL implementation.    Can I use - provides up-to-date browser support tables for support of front-end web technologies.

tools-only Updated Sep 29, 2026 7 repo stars

File contents

Web Tools [TOC]

:black_small_square: Browsers

:black_small_square: SSL/Security

:black_small_square: HTTP Headers & Web Linters

:black_small_square: DNS

:black_small_square: Mail

:black_small_square: Encoders/Decoders and Regex testing

:black_small_square: Net-tools

:black_small_square: Privacy

:black_small_square: Code parsers/playgrounds

:black_small_square: Performance

:black_small_square: Mass scanners (search engines)

:black_small_square: Generators

:black_small_square: Passwords

:black_small_square: CVE/Exploits databases

:black_small_square: Mobile apps scanners

:black_small_square: Private Search Engines

:black_small_square: Secure Webmail Providers

:black_small_square: Crypto

:black_small_square: PGP Keyservers

Systems/Services [TOC]

---name: web-tools-and-nbsp-toc-anger-table-of-contentsdescription:    SSL/TLS Capabilities of Your Browser - test your browser's SSL implementation.    Can I use - provides up-to-date browser support tables for support of front-end web technologies.---#### Web Tools  [[TOC]](#anger-table-of-contents)##### :black_small_square: Browsers   <a href="https://www.ssllabs.com/ssltest/viewMyClient.html">SSL/TLS Capabilities of Your Browser</a> - test your browser's SSL implementation.    <a href="https://caniuse.com/">Can I use</a> - provides up-to-date browser support tables for support of front-end web technologies.    <a href="https://panopticlick.eff.org/">Panopticlick 3.0</a> - is your browser safe against tracking?    <a href="https://privacy.net/analyzer/">Privacy Analyzer</a> - see what data is exposed from your browser.    <a href="https://browserleaks.com/">Web Browser Security</a> - it's all about Web Browser fingerprinting.    <a href="https://www.howsmyssl.com/">How's My SSL?</a> - help a web server developer learn what real world TLS clients were capable of.    <a href="https://suche.org/sslClientInfo">sslClientInfo</a> - client test (incl TLSv1.3 information). ##### :black_small_square: SSL/Security   <a href="https://www.ssllabs.com/ssltest/">SSLLabs Server Test</a> - performs a deep analysis of the configuration of any SSL web server.    <a href="https://dev.ssllabs.com/ssltest/">SSLLabs Server Test (DEV)</a> - performs a deep analysis of the configuration of any SSL web server.    <a href="https://www.immuniweb.com/ssl/">ImmuniWeb® SSLScan</a> - test SSL/TLS (PCI DSS, HIPAA and NIST).    <a href="https://www.jitbit.com/sslcheck/">SSL Check</a> - scan your website for non-secure content.    <a href="http://www.ssltools.com">SSL Scanner</a> - analyze website security.    <a href="https://cryptcheck.fr/">CryptCheck</a> - test your TLS server configuration (e.g. ciphers).    <a href="https://urlscan.io/">urlscan.io</a> - service to scan and analyse websites.    <a href="https://report-uri.com/home/tools">Report URI</a> - monitoring security policies like CSP and HPKP.    <a href="https://csp-evaluator.withgoogle.com/">CSP Evaluator</a> - allows developers and security experts to check if a Content Security Policy.    <a href="https://uselesscsp.com/">Useless CSP</a> - public list about CSP in some big players (might make them care a bit more).    <a href="https://whynohttps.com/">Why No HTTPS?</a> - top 100 websites by Alexa rank not automatically redirecting insecure requests.    <a href="https://ciphersuite.info/">TLS Cipher Suite Search</a>- cipher suite search engine.    <a href="https://github.com/RaymiiOrg/cipherli.st">cipherli.st</a> - strong ciphers for Apache, Nginx, Lighttpd, and more.*    <a href="https://2ton.com.au/dhtool/">dhtool</a> - public Diffie-Hellman parameter service/tool.    <a href="https://badssl.com/">badssl.com</a> - memorable site for testing clients against bad SSL configs.    <a href="https://tlsfun.de/">tlsfun.de</a> - registered for various tests regarding the TLS/SSL protocol.    <a href="https://sslmate.com/caa/">CAA Record Helper</a> - generate a CAA policy.    <a href="https://ccadb.org/resources">Common CA Database</a> - repository of information about CAs, and their root and intermediate certificates.    <a href="https://certstream.calidog.io/">CERTSTREAM</a> - real-time certificate transparency log update stream.    <a href="https://crt.sh/">crt.sh</a> - discovers certificates by continually monitoring all of the publicly known CT.    <a href="https://www.hardenize.com/">Hardenize</a> - deploy the security standards.    <a href="https://cryptcheck.fr/suite/">Cipher suite compatibility</a> - test TLS cipher suite compatibility.    <a href="https://www.urlvoid.com/">urlvoid</a> - this service helps you detect potentially malicious websites.    <a href="https://securitytxt.org/">security.txt</a> - a proposed standard (generator) which allows websites to define security policies.    <a href="https://github.com/mozilla/ssl-config-generator">ssl-config-generator</a> - help you follow the Mozilla Server Side TLS configuration guidelines.    <a href="https://github.com/mjol/TLScan">TLScan</a> - pure python, SSL/TLS protocol and cipher scanner/enumerator. ##### :black_small_square: HTTP Headers & Web Linters   <a href="https://securityheaders.com/">Security Headers</a> - analyse the HTTP response headers (with rating system to the results).    <a href="https://observatory.mozilla.org/">Observatory by Mozilla</a> - set of tools to analyze your website.    <a href="https://webhint.io/">webhint</a> - is a linting tool that will help you with your site's accessibility, speed, security, and more. ##### :black_small_square: DNS   <a href="http://viewdns.info/">ViewDNS</a> - one source for free DNS related tools and information.    <a href="https://dnslookup.org/">DNSLookup</a> - is an advanced DNS lookup tool.    <a href="https://dnslytics.com/">DNSlytics</a> - online DNS investigation tool.    <a href="https://dnsspy.io/">DNS Spy</a> - monitor, validate and verify your DNS configurations.    <a href="https://zonemaster.iis.se/en/">Zonemaster</a> - helps you to control how your DNS works.    <a href="http://leafdns.com/">Leaf DNS</a> - comprehensive DNS tester.    <a href="https://findsubdomains.com/">Find subdomains online</a> - find subdomains for security assessment penetration test.    <a href="https://dnsdumpster.com/">DNSdumpster</a> - dns recon & research, find & lookup dns records.    <a href="https://dnstable.com/">DNS Table online</a> - search for DNS records by domain, IP, CIDR, ISP.    <a href="https://intodns.com/">intoDNS</a> - DNS and mail server health checker.    <a href="http://www.zonecut.net/dns/">DNS Bajaj</a> - check the delegation of your domain.    <a href="https://www.buddyns.com/delegation-lab/">BuddyDNS Delegation LAB</a> - check, trace and visualize delegation of your domain.    <a href="https://dnssec-debugger.verisignlabs.com/">dnssec-debugger</a> - DS or DNSKEY records validator.    <a href="http://ptrarchive.com/">PTRarchive.com</a> - this site is responsible for the safekeeping of historical reverse DNS records.    <a href="http://xip.io/">xip.io</a> - wildcard DNS for everyone.    <a href="https://nip.io/">nip.io</a> - dead simple wildcard DNS for any IP Address.    <a href="https://ceipam.eu/en/dnslookup.php">dnslookup (ceipam)</a> - one of the best DNS propagation checker (and not only).    <a href="https://whatsmydns.com">What's My DNS</a> - DNS propagation checking tool.    <a href="https://blog.erbbysam.com/index.php/2019/02/09/dnsgrep/">DNSGrep</a> - quickly searching large DNS datasets. ##### :black_small_square: Mail   <a href="https://luxsci.com/smtp-tls-checker">smtp-tls-checker</a> - check an email domain for SMTP TLS support.    <a href="https://mxtoolbox.com/SuperTool.aspx">MX Toolbox</a> - all of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.    <a href="https://www.checktls.com/index.html">Secure Email</a> - complete email test tools for email technicians.    <a href="http://www.blacklistalert.org/">blacklistalert</a> - checks to see if your domain is on a Real Time Spam Blacklist.    <a href="http://multirbl.valli.org/">MultiRBL</a> - complete IP check for sending Mailservers.    <a href="https://dkimvalidator.com/">DKIM SPF & Spam Assassin Validator</a> - checks mail authentication and scores messages with Spam Assassin. ##### :black_small_square: Encoders/Decoders and Regex testing   <a href="https://www.url-encode-decode.com/">URL Encode/Decode</a> - tool from above to either encode or decode a string of text.    <a href="https://uncoder.io/">Uncoder</a> - the online translator for search queries on log data.    <a href="https://regex101.com/">Regex101</a> - online regex tester and debugger: PHP, PCRE, Python, Golang and JavaScript.    <a href="https://regexr.com/">RegExr</a> - online tool to learn, build, & test Regular Expressions (RegEx / RegExp).    <a href="https://www.regextester.com/">RegEx Testing</a> - online regex testing tool.    <a href="https://www.regexpal.com/">RegEx Pal</a> - online regex testing tool + other tools.    <a href="https://gchq.github.io/CyberChef/">The Cyber Swiss Army Knife</a> - a web app for encryption, encoding, compression and data analysis. ##### :black_small_square: Net-tools   <a href="https://toolbar.netcraft.com/site_report">Netcraft</a> - detailed report about the site, helping you to make informed choices about their integrity.*    <a href="https://atlas.ripe.net/">RIPE NCC Atlas</a> - a global, open, distributed Internet measurement platform.    <a href="https://www.robtex.com/">Robtex</a> - uses various sources to gather public information about IP numbers, domain names, host names, etc.    <a href="https://securitytrails.com/">Security Trails</a> - APIs for Security Companies, Researchers and Teams.    <a href="https://tools.keycdn.com/curl">Online Curl</a> - curl test, analyze HTTP Response Headers.    <a href="https://extendsclass.com/">Online Tools for Developers</a> - HTTP API tools, testers, encoders, converters, formatters, and other tools.    <a href="https://ping.eu/">Ping.eu</a> - online Ping, Traceroute, DNS lookup, WHOIS and others.    <a href="https://network-tools.com/">Network-Tools</a> - network tools for webmasters, IT technicians & geeks.    <a href="https://bgpview.io/">BGPview</a> - search for any ASN, IP, Prefix or Resource name.    <a href="https://isbgpsafeyet.com/">Is BGP safe yet?</a> - check BGP (RPKI) security of ISPs and other major Internet players.    <a href="https://riseup.net/">Riseup</a> - provides online communication tools for people and groups working on liberatory social change.    <a href="https://www.virustotal.com/gui/home/upload">VirusTotal</a> - analyze suspicious files and URLs to detect types of malware. ##### :black_small_square: Privacy   <a href="https://www.privacyguides.org/">privacyguides.org</a> - provides knowledge and tools to protect your privacy against global mass surveillance.    <a href="https://dnsprivacy.org/wiki/display/DP/DNS+Privacy+Test+Servers">DNS Privacy Test Servers</a> - DNS privacy recursive servers list (with a 'no logging' policy). ##### :black_small_square: Code parsers/playgrounds   <a href="https://www.shellcheck.net/">ShellCheck</a> - finds bugs in your shell scripts.    <a href="https://explainshell.com/">explainshell</a> - get interactive help texts for shell commands.    <a href="https://jsbin.com/?html,output">jsbin</a> - live pastebin for HTML, CSS & JavaScript, and more.    <a href="https://codesandbox.io/">CodeSandbox</a> - online code editor for web application development.    <a href="http://sandbox.onlinephpfunctions.com/">PHP Sandbox</a> - test your PHP code with this code tester.    <a href="https://www.repl.it/">Repl.it</a> - an instant IDE to learn, build, collaborate, and host all in one place.    <a href="http://www.vclfiddle.net/">vclFiddle</a> - is an online tool for experimenting with the Varnish Cache VCL.    <a href="https://github.com/hadolint/hadolint">Haskell Dockerfile Linter</a> - a smarter Dockerfile linter that helps you build best practice Docker images. ##### :black_small_square: Performance   <a href="https://gtmetrix.com/">GTmetrix</a> - analyze your site’s speed and make it faster.    <a href="https://performance.sucuri.net/">Sucuri loadtimetester</a> - test here theperformance of any of your sites from across the globe.    <a href="https://tools.pingdom.com/">Pingdom Tools</a> - analyze your site’s speed around the world.    <a href="https://pingme.io/">PingMe.io</a> - run website latency tests across multiple geographic regions.    <a href="https://developers.google.com/speed/pagespeed/insights/">PageSpeed Insights</a> - analyze your site’s speed and make it faster.    <a href="https://web.dev/">web.dev</a> - helps developers like you learn and apply the web's modern capabilities to your own sites and apps.    <a href="https://github.com/GoogleChrome/lighthouse">Lighthouse</a> - automated auditing, performance metrics, and best practices for the web. ##### :black_small_square: Mass scanners (search engines)   <a href="https://censys.io/">Censys</a> - platform that helps information security practitioners discover, monitor, and analyze devices.    <a href="https://www.shodan.io/">Shodan</a> - the world's first search engine for Internet-connected devices.    <a href="https://2000.shodan.io/#/">Shodan 2000</a> - this tool looks for randomly generated data from Shodan.    <a href="https://viz.greynoise.io/table">GreyNoise</a> - mass scanner such as Shodan and Censys.    <a href="https://www.zoomeye.org/">ZoomEye</a> - search engine for cyberspace that lets the user find specific network components.    <a href="https://netograph.io/">netograph</a> - tools to monitor and understand deep structure of the web.    <a href="https://fofa.so/">FOFA</a> - is a cyberspace search engine.    <a href="https://www.onyphe.io/">onyphe</a> - is a search engine for open-source and cyber threat intelligence data collected.    <a href="https://intelx.io/">IntelligenceX</a> - is a search engine and data archive.    <a href="https://app.binaryedge.io/">binaryedge</a> - it scan the entire internet space and create real-time threat intelligence streams and reports.    <a href="https://spyse.com/">Spyse</a> - Internet assets registry: networks, threats, web objects, etc.    <a href="https://wigle.net/">wigle</a> - is a submission-based catalog of wireless networks. All the networks. Found by Everyone.    <a href="https://publicwww.com/">PublicWWW</a> - find any alphanumeric snippet, signature or keyword in the web pages HTML, JS and CSS code.    <a href="https://inteltechniques.com/index.html">IntelTechniques</a> - this repository contains hundreds of online search utilities.    <a href="https://hunter.io/">hunter</a> - lets you find email addresses in seconds and connect with the people that matter for your business.    <a href="https://ghostproject.fr/">GhostProject?</a> - search by full email address or username.    <a href="https://www.databreaches.live/">databreaches</a> - was my email affected by data breach?    <a href="https://weleakinfo.com">We Leak Info</a> - world's fastest and largest data breach search engine.    <a href="https://pulsedive.com/">Pulsedive</a> - scans of malicious URLs, IPs, and domains, including port scans and web requests.    <a href="https://buckets.grayhatwarfare.com/">Buckets by Grayhatwarfar</a> - database with public search for Open Amazon S3 Buckets and their contents.    <a href="https://vigilante.pw/">Vigilante.pw</a> - the breached database directory.    <a href="https://builtwith.com/">builtwith</a> - find out what websites are built with.    <a href="https://nerdydata.com/">NerdyData</a> - search the web's source code for technologies, across millions of sites.    <a href="http://zorexeye.com/">zorexeye</a> - search for sites, images, apps, softwares & more.    <a href="https://www.mmnt.net/">Mamont's open FTP Index</a> - if a target has an open FTP site with accessible content it will be listed here.    <a href="https://osintframework.com/">OSINT Framework</a> - focused on gathering information from free tools or resources.    <a href="https://www.maltiverse.com/search">maltiverse</a> - is a service oriented to cybersecurity analysts.    <a href="https://leakedsource.ru/main/">Leaked Source</a> - is a collaboration of data found online in the form of a lookup.    <a href="https://search.weleakinfo.com/">We Leak Info</a> - to help everyday individuals secure their online life, avoiding getting hacked.    <a href="https://pipl.com/">pipl</a> - is the place to find the person behind the email address, social username or phone number.    <a href="https://abuse.ch/">abuse.ch</a> - is operated by a random swiss guy fighting malware for non-profit.    <a href="http://malc0de.com/database/">malc0de</a> - malware search engine.    <a href="https://cybercrime-tracker.net/index.php">Cybercrime Tracker</a> - monitors and tracks various malware families that are used to perpetrate cyber crimes.    <a href="https://github.com/eth0izzle/shhgit/">shhgit</a> - find GitHub secrets in real time.    <a href="https://searchcode.com/">searchcode</a> - helping you find real world examples of functions, API's and libraries.    <a href="http://www.insecam.org/">Insecam</a> - the world biggest directory of online surveillance security cameras.    <a href="http://index-of.es/">index-of</a> - contains great stuff like: security, hacking, reverse engineering, cryptography, programming etc.    <a href="https://opendata.rapid7.com/">Rapid7 Labs Open Data</a> - is a great resources of datasets from Project Sonar.    <a href="https://webtechsurvey.com/common-response-headers">Common Response Headers</a> - the largest database of HTTP response headers.    <a href="https://labs.inquest.net">InQuest Labs</a> - InQuest Labs is an open, interactive, and API driven data portal for security researchers. ##### :black_small_square: Generators   <a href="https://thispersondoesnotexist.com/">thispersondoesnotexist</a> - generate fake faces in one click - endless possibilities.    <a href="https://generated.photos">AI Generated Photos</a> - 100.000 AI generated faces.    <a href="https://www.fakenamegenerator.com/">fakenamegenerator</a> - your randomly generated identity.    <a href="https://tools.intigriti.io/redirector/">Intigriti Redirector</a> - open redirect/SSRF payload generator. ##### :black_small_square: Passwords   <a href="https://haveibeenpwned.com/">have i been pwned?</a> - check if you have an account that has been compromised in a data breach.    <a href="https://www.dehashed.com/">dehashed</a> - is a hacked database search engine.    <a href="https://leakedsource.ru/">Leaked Source</a> - is a collaboration of data found online in the form of a lookup. ##### :black_small_square: CVE/Exploits databases   <a href="https://cve.mitre.org/">CVE Mitre</a> - list of publicly known cybersecurity vulnerabilities.    <a href="https://www.cvedetails.com/">CVE Details</a> - CVE security vulnerability advanced database.    <a href="https://www.exploit-db.com/">Exploit DB</a> - CVE compliant archive of public exploits and corresponding vulnerable software.    <a href="https://0day.today/">0day.today</a> - exploits market provides you the possibility to buy/sell zero-day exploits.    <a href="https://sploitus.com/">sploitus</a> - the exploit and tools database.    <a href="https://cxsecurity.com/exploit/">cxsecurity</a> - free vulnerability database.    <a href="https://www.vulncode-db.com/">Vulncode-DB</a> - is a database for vulnerabilities and their corresponding source code if available.    <a href="https://cveapi.com/">cveapi</a> - free API for CVE data. ##### :black_small_square: Mobile apps scanners   <a href="https://www.immuniweb.com/mobile/">ImmuniWeb® Mobile App Scanner</a> - test security and privacy of mobile apps (iOS & Android).    <a href="https://vulnerabilitytest.quixxi.com/">Quixxi</a> - free Mobile App Vulnerability Scanner for Android & iOS.    <a href="https://www.ostorlab.co/scan/mobile/">Ostorlab</a> - analyzes mobile application to identify vulnerabilities and potential weaknesses. ##### :black_small_square: Private Search Engines   <a href="https://www.startpage.com/">Startpage</a> - the world's most private search engine.    <a href="https://searx.me/">searX</a> - a privacy-respecting, hackable metasearch engine.    <a href="https://darksearch.io/">darksearch</a> - the 1st real Dark Web search engine.    <a href="https://www.qwant.com/">Qwant</a> - the search engine that respects your privacy.    <a href="https://duckduckgo.com/">DuckDuckGo</a> - the search engine that doesn't track you.    <a href="https://swisscows.com/">Swisscows</a> - privacy safe web search    <a href="https://search.disconnect.me/">Disconnect</a> - the search engine that anonymizes your searches.    <a href="https://metager.org/">MetaGer</a> - the search engine that uses anonymous proxy and hidden Tor branches. ##### :black_small_square: Secure Webmail Providers   <a href="https://countermail.com/">CounterMail</a> - online email service, designed to provide maximum security and privacy.    <a href="http://mail2tor.com/">Mail2Tor</a> - is a Tor Hidden Service that allows anyone to send and receive emails anonymously.    <a href="https://tutanota.com/">Tutanota</a> - is the world's most secure email service and amazingly easy to use.    <a href="https://protonmail.com/">Protonmail</a> - is the world's largest secure email service, developed by CERN and MIT scientists.    <a href="https://www.startmail.com/en/">Startmail</a> - private & encrypted email made easy. ##### :black_small_square: Crypto   <a href="https://keybase.io/">Keybase</a> - it's open source and powered by public-key cryptography. ##### :black_small_square: PGP Keyservers   <a href="https://keyserver.ubuntu.com/">SKS OpenPGP Key server</a> - services for the SKS keyservers used by OpenPGP. #### Systems/Services  [[TOC]](#anger-table-of-contents)

Frequently asked questions

Web Tools &nbsp;[[TOC]](#anger-table-of-contents)