Every Domain Extension Explained: Which TLD Should You Choose in 2026?

A domain extension, or top-level domain (TLD), is the part after the last dot: .com, .org, .de, .ai. IANA's list held 1,437 of them on 16 October 2026, 248 of which were two-letter country codes, but only a few dozen matter for most people. The short version: take a good .com if you can, use your country's code if you serve one country, use a specialised extension only when your audience already expects it, and always compare the renewal price, because several extensions that cost one or two dollars in the first year renew at ten to twenty times that.

How much the extension matters

For people, a lot: it is part of the name they have to remember and type. For search engines, little. Google's SEO Starter Guide says the TLD "only matters if you're targeting a specific country's users, and even then it's usually a low impact signal", and that "otherwise Google Search doesn't care which TLD you're using (whether it's a .com or .org or .asia)". Its documentation on multi-regional sites makes the one exception explicit: country codes are "tied to a specific country" and "provide a strong signal to both users and search engines that your site is explicitly intended for a certain country".

So choose the extension for your audience and your budget, not for rankings.

What each extension costs: one registrar's list

Prices differ by registrar, so the useful comparison is first-year price against renewal at one registrar on one day. Porkbun publishes its full price list publicly; these figures were read from it on 16 October 2026, in USD per year, with the five-year cost (first year plus four renewals):

Porkbun does not sell every country code (.fr, .no, .es and .it were not on its list), and other registrars will be higher or lower on each line. The pattern, not the exact figure, is the lesson: the cheap first year is a promotion, and the renewal column is the bill. Domain registration cost 2026 compares registrars on exactly this basis.

The standard three: .com, .org, .net

.com, the default

The extension people assume when they hear a name, and by far the largest: Verisign's Domain Name Industry Brief counted 166.6 million .com registrations out of 401.6 million names across all extensions on 30 June 2026. It fits every industry and has the deepest resale market. The downside is availability: most short, obvious .com names were registered long ago, so you may need a modifier (getacme.com, tryacme.com) or an alternative. Note that Verisign raises its .com wholesale price to registrars from USD 10.26 to USD 10.97 on 1 November 2026.

.org, for organisations and projects

Strongly associated with non-profits, open-source projects and communities; wikipedia.org and archive.org reinforce the image. Excellent for those, confusing for a commercial business, which readers may assume is a charity.

.net, the long-standing alternative

Originally meant for network providers, now general-purpose; Verisign counted 12.5 million .net names on 30 June 2026. It is a legitimate choice when it suits the brand, though many people will try the .com first. Verisign's 27 August 2026 SEC filing raises the .net wholesale price from USD 10.91 to USD 12.00 on 1 March 2027.

Tech extensions: .io, .ai, .app, .dev

.io

Popular with tech start-ups since the 2010s; github.io hosts GitHub's Pages sites. It is technically the country code for the British Indian Ocean Territory, whose political status has been under discussion, which some businesses weigh as a long-term risk. The practical drawback is cost: at the renewal price above, a .io costs more than four times a .com over five years.

.ai

The country code for Anguilla, now synonymous with artificial-intelligence products; character.ai and perplexity.ai are well-known examples. In DN Journal's 2026 year-to-date sales chart, read on 16 October 2026, .ai names took 36 of the first 100 entries, which shows how strong demand is. It is also the most expensive extension in the table to hold. For a business that is not about AI, it sends the wrong signal.

.app and .dev

Both are run by Google Registry and require HTTPS. Google Registry's .app page says the extension "is included on the HSTS preload list, making HTTPS required on all connections to .app websites". cash.app is a prominent .app; web.dev is Google's own developer resource. Both are reasonable value at the prices above, and the built-in HTTPS requirement is a security feature rather than a hurdle, since most hosts issue free certificates; what an SSL certificate is explains.

Commercial alternatives: .co, .shop, .store, .online

For most shops a .com or a country code is still the stronger address; how to build an online store covers the rest of the set-up.

Country codes (ccTLDs)

Two-letter extensions belong to countries and are run by national registries, each with its own rules. Some are open to anyone; others require a local address, a company registration or citizenship. Always take the rule from the registry itself. A few examples:

Google treats some country codes, such as .tv and .me, as generic because they are used worldwide. The ccTLD guide covers when a country code is the right call, and best TLDs for European businesses covers the European registries in depth.

New generic extensions

Since ICANN's new gTLD programme opened in 2012, hundreds of generic extensions have launched: .xyz, .site, .tech, .life, .club and many more. Some have become respectable in a niche; most remain unfamiliar to ordinary readers. Three things to know:

Registry premium names are a separate issue: some extensions charge more, sometimes every year, for names they class as premium. Premium domain renewal prices explains how to spot one.

How to decide

The name matters more than the extension: a great name on a sensible extension beats a forgettable name on .com. How to choose a domain name covers the name itself, and our domain name generator checks a keyword across several extensions at once.

Frequently asked questions

How many domain extensions are there?

IANA's list held 1,437 top-level domains on 16 October 2026 (version 2026101600), of which 248 were two-letter country codes. The rest are generic extensions such as .com and .org, new gTLDs such as .xyz, and brand extensions run by companies.

Does the domain extension affect SEO?

Very little. Google's SEO Starter Guide says the TLD only matters if you target a specific country's users, and even then it is usually a low-impact signal. Country codes are the exception: Google describes them as a strong signal that a site is intended for that country.

Which domain extension is the cheapest?

In the first year, extensions such as .online, .site and .xyz cost about two dollars at Porkbun on 16 October 2026, but they renewed at USD 14.21 to USD 28.84. Over five years .de (USD 19.18) and .co.uk (USD 28.30) were cheaper than .com (USD 55.40) at the same registrar.

Why do .app and .dev domains require HTTPS?

Google Registry runs both and has placed them on the browsers' HSTS preload list, so browsers only connect to them over HTTPS. Most hosts issue free certificates, so this rarely costs anything.

Can anyone register a country-code domain?

It depends on the registry. Some country codes are open worldwide; others require a local presence, company registration or national ID. Norway's .no, for example, requires a Norwegian-registered organisation or an adult with a Norwegian national identity number and postal address.