Free for everyone — no credit card needed

Your project deserves
a real domain from day one.

Claim a free subdomain on nexsub.online, mydemodomain.buzz or demoinstance.online . Manage DNS records, deploy in seconds.

Get your subdomain free What's included

No setup fees · Instant activation · 3 domains to choose from · Up to 5 subdomains per account

Check availability
Available on
.nexsub.online default
.mydemodomain.buzz
.demoinstance.online
Features
Everything included, always free.

No hidden upsells. Full DNS management, sub-record support — all in the free tier.

Multiple Domains

Choose from 3 domains: NexSub (default), MyDemoDomain, DemoInstance. Switch anytime from your dashboard.

Full DNS Control

Manage A, AAAA, CNAME, MX, TXT, NS, SRV, CAA and more. Changes propagate in minutes.

Instant Activation

No waiting period. Your subdomain is live within seconds of creation. No manual review.

Isolated by Design

You only ever see and control your own subdomains and DNS records. Full data isolation.

Sub-record Support

Add records for api.you.nexsub.online — any depth below your subdomain works perfectly.

How it works
Up and running
in 60 seconds.
Create account
Register with email and password. No billing info, no waiting.
Pick your domain
Choose from 3 available domains — or switch later.
Claim subdomain
Pick your name. It's live immediately.
Manage DNS
Add A, CNAME, MX and any other records from the dashboard.
Start for free
$ checking myapp.nexsub.online...
✔ Available — subdomain created
$ adding A record 203.0.113.4...
✔ DNS record published
$ checking myapp.mydemodomain.buzz...
✔ Available on all 3 domains
3
Domains
10k+
Subdomains
< 1min
Propagation
Free
Forever

Ready to claim your subdomain?

Register in 30 seconds. No credit card. No catch.

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