That one website that
checks if a website is down for everyone
Down for Everyone or Just Me downforeveryoneorjustme.com
FreeNo signup
That one website that
shows what a website used to look like
Wayback Machine web.archive.org
FreeNo signup
That one website that
tests regular expressions
regex101 regex101.com
FreeNo signup
That one website that
makes beautiful screenshots of code
Carbon carbon.now.sh
FreeNo signup
That one website that
tells you which browsers support a feature
Can I Use caniuse.com
FreeNo signup
That one website that
makes a favicon for every browser and device
RealFaviconGenerator realfavicongenerator.net
FreeNo signup
That one website that
formats and checks messy JSON
JSON Formatter & Validator jsonformatter.curiousconcept.com
FreeNo signup
That one website that
explains a cron schedule in plain English
crontab.guru crontab.guru
FreeNo signup
That one website that
looks up a domain's DNS records from around the world
whatsmydns.net whatsmydns.net
FreeNo signup
That one website that
checks if a website's SSL certificate is set up right
SSL Labs SSL Server Test ssllabs.com
FreeNo signup
That one website that
tests how fast a web page loads
PageSpeed Insights pagespeed.web.dev
FreeNo signup
That one website that
shows how a link will look when shared on social media
OpenGraph opengraph.xyz
Free tierSignup optional
That one website that
explains a shell command piece by piece
explainshell explainshell.com
FreeNo signup
That one website that
makes placeholder images for mockups and code
Placehold placehold.co
FreeNo signup
That one website that
edits a table and converts it between CSV, Excel, JSON and more
TableConvert tableconvert.com
FreeNo signup