Website History
Old versions of sites, domain and DNS history.
Chain
Free
See old versions of any website, and save a copy of a page before it's changed or deleted.
Free
VirusTotal
virustotal.com
Scan a link, file, domain or IP with dozens of antivirus engines at once before you open it.
Free + paid
Intelligence X
intelx.io
Search engine and archive for leaks, paste sites, darknet pages and old WHOIS data.
Free
urlscan.io
urlscan.io
Scan a website safely: see a screenshot, where it loads from, and whether it's flagged as malicious.
Free + paid
SecurityTrails
securitytrails.com
Domain and DNS history: see past IPs, subdomains and WHOIS records for any website.
Free
Archive Today
archive.ph
Save a snapshot of any web page, including posts, so you have a permanent copy.