DNS / IP
- MXToolBox – https://mxtoolbox.com
- Reverse IP Lookup – https://mxtoolbox.com/ReverseLookup.aspx
- MXToolBox Investigator – https://mxtoolbox.com/Public/FreeInvestigator.aspx
Grafik
- Adobe Color Wheel – Generate a color palette based on a color of your choice or an uploaded image – https://color.adobe.com/create/color-wheel/
- flatIcon – large database of free icons (PNG, SVG, EPS, PSD, BASE 64) – https://www.flaticon.com/
- TinyJPG / TinyPNG – https://tinypng.com/
- SVGOMG – Online SVG-Optimizer – https://jakearchibald.github.io/svgomg/
HTML
- Built With – Find out what a website was built with – https://builtwith.com/
- Extract Link-URLs/Href from HTML – http://tools.buzzstream.com/link-building-extract-urls
PageSpeed
- WebPageTest.org – Website Performance and Optimization Test – https://www.webpagetest.org/
- Google PageSpeed Insight – https://developers.google.com/speed/pagespeed/insights/
Social Media
- Later.com – Schedule Social Media Posts on e.g. Facebook & Instagram – https://www.later.com
SSL
- SSL Labs – SSL Server Test – Analysis of the configuration of any SSL web server: https://www.ssllabs.com/ssltest/
- JitBit SSL Test – Crawl any HTTPS-website (entire website, recursively, following internal links) and search for non-secure images, scripts and css-files that will trigger a warning message in browsers https://www.jitbit.com/sslcheck/
Verschiedenes
- Online PO file editor – Create & edit PO translation files in your browser –https://localise.biz/free/poeditor
- Time Zone Converter – https://www.timeanddate.com/worldclock/converter.html