We compiled a list of useful online tools for IT adminstrators
Popular
- www.dinopass.com/ - good password generator for everyone
- www.speedtest.net/ - broadband speed test
- www.sxl.net/tools/domainc... - SXL's Whois tool, can check .HK
- multirbl.valli.org/ - check many email RBL blacklist
- www.unitconverters.net/ti... unit converter
- www.whatsabyte.com/P1/byt... - convert between byte, KB, MB, GB, etc
Network Admin
Connectivity
- online-domain-tools.com - many useful tools - DNS, NMAP, Decrypt, etc.
- cloudmonitor.ca.com/en/pi... - worldwide ping test
- www.super-ping.com - worldwide ping test, include China
- www.webkaka.com/ - ping test and many useful tools in China.
- ping.eu/port-chk/ - check TCP port
- mebsd.com/oui-mac-address... - find vendor name by MAC address
- www.nabber.org/projects/g... - graphics traceroute on map
- www.nerdtools.co.uk/ports... - check security
Speed Test
- www.speedtest.net/ - internet speed test
- speedtest.ofca.gov.hk/ - internet speed test for Hong Kong
- www.speedtest.com.sg/spee... - internet speed test
- www.myspeedmeter.net - speed test
DNS Tools
- www.webdnstools.com - many userful tools
- www.intodns.com/ - DNS health report
- mebsd.com/glue - lookup DNS glue records
- www.nabber.org/projects/d... - DNS check, include IPv6 and DNSSEC
Encode/Decode/KeyGen
- www.sxl.net/tools/pwgen/ - password and salt generator
- www.webdnstools.com/dnsto... - MD5/SHA hash generator
- www.tools4noobs.com/onlin... - DES/3DES/Blowfish,etc.
- www.tools4noobs.com/onlin... Ascii85 encode/decode
- toolsmother.com/base-32-6...
Postmaster
- multirbl.valli.org/
- www.rbl-check.com/
- mxtoolbox.com/ - many mail server tools
- www.anti-spam.org.cn/
- postmaster.aol.com/Postma...
- www.senderbase.org
- ipremoval.sms.symantec.co...
- www.emailsecuritygrader.c...
- www.barracudacentral.org/...
- www.senderscore.org/
- www.emailreg.org/ Register return
Web
Webmaster/SEO
- www.w3.org/QA/Tools/ - many kind of validators
- builtwith.com/ - Check web server application stack
- www.spyonweb.com/ - Find other sites of the same owner
- webscore.online-domain-to...
- tools.pingdom.com/fpt/ - Website speed test
- developers.google.com/spe...
- www.webkaka.com/webCheck....
- cloudmonitor.ca.com/en/ch...
- website-link-checker.onli...
- smallseotools.com/ - Many SEO tools
- seositecheckup.com/
- www.woorank.com/
- www.seoworkers.com/tools/...
- www.opensiteexplorer.org/ - check back links
- www.majesticseo.com/ - check back links
- www.linkdiagnosis.com/ - check back links
- validator.w3.org/checklin... - check broken links
- www.copyscape.com/ - check duplicate contents
- www.sharedcount.com/ - check no. of shares/likes
- socialmention.com/ - check no. of shares/likes
- tool.chinaz.com/Seos/Site...
- www.sxl.net/tools/prcheck...
Website Submit
- www.google.com/webmasters...
- www.bing.com/toolbox/webm...
- zhanzhang.baidu.com/
- webmaster.yandex.com/
- www.webmasterhome.cn/
- www.google.com/submityour...
- search.yahoo.com/info/sub...
- www.bing.com/toolbox/subm...
- www.dmoz.org/help/submit....
- zhanzhang.baidu.com/sites...
- webmaster.yandex.com/addu...
- www.alexa.com/siteowners/...
- www.pingmyurl.com/
- www.entireweb.com/free_su...
- www.freewebsubmission.com...
- www.webmasterhome.cn/seo/...
Web Developer
- iphone4simulator.com/
- panchoat.org/utils/multim... - Excel to Markdown
- www.tablesgenerator.com/ - include Latex, Markdown, Mediawiki, etc.
- tableizer.journalistopia.... - convert Excel to HTML table