Blog
Product update · v1.2.0

Hello, Affixes

Two features for the same workflow loop: stop typing every variant by hand, and stop opening the popup just to check a name you already see on screen.

Feb 27, 2026 3 min read
Affixes generating domain variants in the DomainToolBelt extension

You think of a name, type it in, and it's taken. So you try a prefix. Then a different TLD. Then you tweak the spelling. After a dozen searches you've half-forgotten what you were even checking. v1.2.0 fixes that loop.

What's new

Affixes: auto-generated variants with live availability
Quick Search: highlight text anywhere, look it up in one click
Real-time checks: green-highlighted available names
Customizable: pick your own prefixes and suffixes in Settings

Affixes

When a domain is taken, Affixes builds variants from common prefixes and suffixes and checks availability for each one. No extra typing, no extra tabs.

Search startup and you'll see live availability for getstartup.com, trystartup.io, startupapp.dev, mystartup.ai, and dozens more in the same view.

How to use Affixes

  1. 1Search for any domain in the extension
  2. 2Toggle the Affixes button next to the search bar
  3. 3Browse the variants. Available ones are highlighted in green.

It also works from any WHOIS result page. Click the Affixes icon next to a taken domain and it spins up alternatives based on that domain's keyword.

Quick Search

Spot a brand name in an article you want to look up? With Quick Search on, highlight any text on any page and a DomainToolBelt icon appears next to your selection. One click runs the WHOIS lookup. No popup, no copy-paste.

How to enable Quick Search

  1. 1Open DomainToolBelt and go to Settings
  2. 2Enable Quick Search
  3. 3Select text on any page, then click the floating icon to search

Get the update

Both ship in v1.2.0. Update from the Chrome Web Store or Firefox Add-ons.

Affixes settings panel
Customize which prefixes and suffixes are used in Settings.
Affixes feature demo
Affixes generating and checking variants live.

DomainToolBelt

WHOIS for 200+ TLDs, expiry monitoring, full registration details. One click from your browser.