.io domain name generator
.io is the country-code domain of the British Indian Ocean Territory, and tech companies adopted it because “I/O” reads as input/output. It remains a common choice for developer tools, SaaS and open-source projects. DomainGenTool generates .io names that fit your project and sends you to the registrar to confirm availability.
Updated:
Who .io fits
- Developer tools, APIs, SDKs and open-source projects
- SaaS products aimed at a technical audience
- Startups that want a short name when the .com is taken
.io at a glance
| Registry | Internet Computer Bureau |
|---|---|
| RDAP service | None published in the IANA bootstrap registry |
| Status in DomainGenTool | Unconfirmed: verify at the registrar |
- .io is a country-code TLD managed by Internet Computer Bureau.
- The IANA Root Zone Database lists no RDAP server for .io, so browsers cannot check it directly. DomainGenTool shows .io names as “Unconfirmed”.
- To verify a .io name, open it at the registrar or query the WHOIS server whois.nic.io.
Example prompts for .io names
Describe the product, the audience and the tone. Try one of these, then ask for shorter names or a different style:
- “A command-line tool for managing cloud costs, short and technical”
- “An open-source feature-flag platform, friendly and memorable”
- “An API for real-time sports data, energetic name”
Frequently asked questions
Why does every .io name show as Unconfirmed?
The .io registry does not publish an RDAP service in the IANA bootstrap registry. DomainGenTool only reports “Registered” or “Possibly available” when a registry answers over RDAP, so .io names always need a registrar check.
Is .io only for tech companies?
No, anyone can register it. It is simply most recognised in the tech industry, so non-technical audiences may not know it as well as .com.
Should I pick .io or .dev for a developer tool?
Both are understood by developers. .dev is a generic TLD that requires HTTPS; .io is shorter to say and has a longer history with startups. Generate names for both and compare what is open.
Other extensions
.com generator · .ai generator · .co generator · .app generator · .dev generator
New to availability checks? Read how to check if a domain is available with RDAP or how DomainGenTool works.