Markdown Editor
Write Markdown and see it as you type, with GitHub alerts, tables, tasks, math, Mermaid and PlantUML.
Type a domain to see its DNS records, or an IP address to see its name.
Trygmail.com where its mail goes1.1.1.1 an address's name_dmarc.github.com a DMARC policy
That's not a domain or an IP address.
Each answer is the copy that resolver holds right now. A record you change at your DNS host reaches each resolver as its old copy runs out (its TTL), so for a while Cloudflare and Google can disagree; Both shows where.
More tools
Write Markdown and see it as you type, with GitHub alerts, tables, tasks, math, Mermaid and PlantUML.
Two texts or files side by side, every change lined up to the character.
Google's original Material Design palette from 2014, every shade and accent of its 19 hues in one grid, a tap to copy.