Every time you open a website, watch a video, send an email, or use a mobile app, something important happens behind the scenes before the content even begins to load. Your device first needs to find the internet address of the website or service you want to visit. This essential task is performed by the Domain Name System, better known as DNS.
For decades, traditional DNS has been one of the internet’s most fundamental technologies. Yet it has also had a major weakness: in many cases, DNS requests were sent across the internet without encryption. This meant that internet service providers (ISPs), public Wi-Fi operators, network administrators, or attackers on insecure networks could potentially see which websites a user was trying to access.
To solve this privacy problem, engineers developed a newer technology called DNS over HTTPS (DoH). By encrypting DNS requests using the same secure protocol that protects online banking, shopping, and secure websites, DoH significantly improves user privacy while making it much harder for others to monitor or manipulate DNS traffic.
Today, DNS over HTTPS is supported by modern web browsers, operating systems, and many public DNS providers, making it an increasingly important part of a safer internet.
Understanding the Domain Name System
Before understanding DNS over HTTPS, it helps to understand what DNS actually does.
Every website on the internet has an IP address, which is a numerical identifier similar to a phone number. Computers use these numbers to communicate with one another.
For example, instead of remembering a complex numerical address, people simply type a name such as example.com into their browser.
The Domain Name System acts like the internet’s phonebook. It translates human-readable domain names into IP addresses that computers can understand.
Without DNS, using the internet would be far more difficult because users would need to remember long strings of numbers instead of simple website names.
Every website visit begins with a DNS lookup.
How Traditional DNS Works
When you enter a website address into your browser, your device first sends a DNS request to a DNS resolver. The resolver searches for the correct IP address and returns it to your device. Once your device receives the IP address, it connects to the website’s server and loads the page.
The problem is that traditional DNS usually sends these requests in plain text using protocols such as UDP or TCP on port 53.
Plain text means the information is not encrypted.
Anyone with access to the network may be able to observe these DNS requests. Although they cannot necessarily see the contents of encrypted websites, they can often determine which domains a user is attempting to visit.
This creates significant privacy concerns.
What Is DNS over HTTPS?
DNS over HTTPS, commonly abbreviated as DoH, is a protocol that encrypts DNS requests by sending them through HTTPS, the same secure protocol used by most modern websites.
Instead of transmitting DNS queries as unencrypted network traffic, DoH wraps them inside an encrypted HTTPS connection.
Because HTTPS encrypts the communication between the user’s device and the DNS server, outside observers cannot easily see which websites are being looked up.
In simple terms, DNS over HTTPS hides one of the internet’s most revealing pieces of information: your DNS requests.
Why DNS Needed Better Protection
Traditional DNS was designed during the early years of the internet when privacy threats were much less significant than they are today.
As internet usage expanded, DNS became one of the easiest ways for organizations to monitor user activity.
Internet service providers could often view DNS requests.
Public Wi-Fi operators could potentially monitor browsing activity.
Network attackers on unsecured connections might intercept DNS traffic.
Some organizations could manipulate DNS responses to block or redirect websites.
These weaknesses encouraged the development of encrypted DNS technologies such as DNS over HTTPS and DNS over TLS.
How DNS over HTTPS Works
Although the technology behind DoH is sophisticated, the basic process is surprisingly straightforward.
When you request a website, your browser or operating system creates a DNS query just as it normally would.
Instead of sending that query directly over traditional DNS, the device places the request inside an HTTPS connection.
The encrypted request is then sent securely to a DoH-compatible DNS resolver.
The resolver decrypts the request, performs the DNS lookup, and sends the answer back through the same encrypted HTTPS connection.
Your browser receives the website’s IP address and continues loading the webpage.
Throughout this process, anyone monitoring the network sees encrypted HTTPS traffic rather than readable DNS requests.
Why HTTPS Makes Such a Difference
HTTPS is based on Transport Layer Security (TLS), a cryptographic protocol that protects data exchanged between computers.
The same encryption that keeps passwords, online banking transactions, shopping information, and private messages secure also protects DNS requests when using DoH.
Without the encryption keys, outsiders cannot easily determine which domains are being requested.
This dramatically improves browsing privacy.
The Privacy Benefits of DNS over HTTPS
One of the greatest advantages of DoH is increased privacy.
Since DNS requests are encrypted, internet service providers have less visibility into individual browsing behavior.
People using public Wi-Fi gain additional protection against local network monitoring.
Attackers attempting to observe DNS traffic on insecure networks face much greater difficulty.
The result is a browsing experience that exposes less information about users’ online activities.
However, DoH does not make internet users completely anonymous.
Websites can still collect information through other methods, and internet providers still know which servers a user connects to, even if they cannot easily see every DNS query.
Protection Against DNS Manipulation
Besides improving privacy, DNS over HTTPS also helps prevent certain types of attacks.
One common threat is DNS spoofing.
In a DNS spoofing attack, an attacker provides false DNS responses that redirect users to fraudulent websites.
These fake websites may attempt to steal passwords, banking information, or personal data.
Because DoH encrypts communication between the device and the DNS resolver, it becomes much harder for attackers on the network to modify DNS responses.
Although no technology can eliminate every security risk, DoH significantly reduces opportunities for DNS-based attacks.
DNS over HTTPS Does Not Encrypt Everything
One common misunderstanding is that DNS over HTTPS encrypts all internet traffic.
It does not.
DoH only encrypts DNS requests.
The actual website connection is protected separately using HTTPS if the website supports it.
If a website uses HTTPS, your web traffic is already encrypted. DNS over HTTPS simply adds protection to the process of finding that website’s IP address.
Think of DoH as protecting the address lookup, while HTTPS protects the conversation itself.
DNS over HTTPS Versus Traditional DNS
The biggest difference between traditional DNS and DoH is encryption.
Traditional DNS requests are usually readable by anyone monitoring the network.
DNS over HTTPS encrypts these requests, making them much more private.
Traditional DNS often uses port 53.
DNS over HTTPS uses the standard HTTPS port, port 443.
Because DoH traffic looks like ordinary encrypted web traffic, it is more difficult for outside observers to distinguish DNS requests from other secure internet communications.
DNS over HTTPS Versus DNS over TLS
DNS over HTTPS is not the only encrypted DNS technology.
Another important protocol is DNS over TLS, often abbreviated as DoT.
Both protocols encrypt DNS requests using Transport Layer Security.
The primary difference lies in how they transport those encrypted requests.
DNS over TLS uses its own dedicated network port specifically for encrypted DNS.
DNS over HTTPS sends DNS requests through regular HTTPS connections alongside other secure web traffic.
Both approaches improve privacy and security.
Which one is used often depends on browser support, operating system settings, network policies, and user preference.
Why Modern Browsers Support DNS over HTTPS
Several leading web browsers now support DoH because it strengthens user privacy without requiring significant changes to the internet’s infrastructure.
When enabled, the browser sends DNS requests directly to a compatible encrypted DNS resolver instead of relying solely on traditional DNS provided by the local network.
Some browsers automatically enable DoH when compatible DNS providers are detected.
Others allow users to choose their preferred encrypted DNS provider.
This flexibility has helped increase the adoption of secure DNS worldwide.
Operating Systems Also Support DoH
DNS over HTTPS is no longer limited to browsers.
Modern operating systems increasingly support encrypted DNS at the system level.
When enabled across the operating system, all compatible applications—not just web browsers—can benefit from encrypted DNS requests.
This provides broader privacy protection throughout the device.
Many smartphones, laptops, and desktop computers now include built-in support for encrypted DNS technologies.
Public DNS Providers and DoH
Many public DNS providers now offer DNS over HTTPS services.
These providers operate secure DNS resolvers capable of receiving encrypted DNS requests from users around the world.
Some focus on speed.
Others emphasize privacy by minimizing logging of user activity.
Many combine both goals by offering fast performance together with strong privacy policies.
Choosing a trustworthy DNS provider remains important because the provider still processes your DNS requests after decrypting them.
Encryption protects the requests while they travel across the network, but users should still understand how their chosen provider handles data.
Does DNS over HTTPS Make Browsing Faster?
In many cases, users notice little difference in browsing speed.
Modern DoH implementations are highly optimized.
Some users may even experience faster browsing if their chosen DNS provider has quicker response times than their internet provider’s DNS servers.
Performance depends on many factors, including network quality, server location, caching, and resolver efficiency.
Overall, modern DoH services generally deliver excellent performance while improving privacy.
Does DNS over HTTPS Hide Your IP Address?
No.
DNS over HTTPS does not hide your IP address.
Your internet service provider still knows that your device is communicating with particular servers on the internet.
Similarly, websites you visit can still see your IP address unless you use additional privacy technologies such as a Virtual Private Network (VPN) or the Tor network.
DoH protects DNS queries, not overall internet identity.
Can Organizations Still Manage Their Networks?
Businesses, schools, and organizations often use DNS for security, content filtering, and network management.
The introduction of DoH created new challenges because encrypted DNS may bypass some traditional DNS monitoring systems.
To address this, many organizations configure managed devices to use approved encrypted DNS services while maintaining security policies.
Modern enterprise security solutions increasingly support encrypted DNS without sacrificing network protection.
Is DNS over HTTPS Always Better?
For most home users, DNS over HTTPS offers meaningful privacy improvements.
Encrypted DNS reduces exposure of browsing activity on local networks and makes DNS manipulation attacks more difficult.
However, like every technology, DoH is not a complete security solution.
Safe browsing still depends on secure websites, software updates, strong passwords, multi-factor authentication, and cautious online behavior.
DoH works best as one component of a broader cybersecurity strategy.
Common Misconceptions About DNS over HTTPS
Many people assume that DoH provides complete online anonymity.
This is incorrect.
Others believe DoH functions as a VPN.
It does not.
Some think DoH encrypts every part of their internet connection.
Again, this is not true.
DNS over HTTPS specifically encrypts DNS lookups.
It improves privacy during the domain name resolution process but does not replace HTTPS, VPNs, antivirus software, firewalls, or other cybersecurity tools.
Understanding these differences helps users make informed decisions about their online privacy.
The Future of Secure DNS
As concerns about online privacy continue to grow, encrypted DNS technologies are becoming increasingly common.
Internet browsers, operating systems, mobile devices, cloud services, and enterprise networks are steadily adopting DNS over HTTPS and related technologies.
Engineers continue improving performance, compatibility, and privacy while ensuring the internet remains reliable and scalable.
Although traditional DNS remains widely used, encrypted DNS is rapidly becoming an important standard for protecting users against surveillance and network-based attacks.
Why DNS over HTTPS Matters
Every visit to a website begins with a DNS request, making DNS one of the internet’s most essential yet often overlooked technologies. For many years, these requests were sent without encryption, exposing valuable information about users’ online activities.
DNS over HTTPS changes that by bringing modern encryption to one of the internet’s oldest services. It helps protect privacy, reduces opportunities for DNS manipulation, and strengthens the security of everyday browsing without changing how people use the web.
As the internet continues to evolve, technologies like DNS over HTTPS demonstrate that even long-established systems can be redesigned to meet modern expectations for privacy and security. While it is not a complete solution to every cybersecurity challenge, DoH represents an important step toward a safer, more trustworthy internet for everyone.
