SecretDNS 3.9.3 Update

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Update

Only specified domains can perform SNI fragmentation.
Secure your DNS with DNS over HTTPS.
The ability to bypass SNI eavesdropping (HTTP/HTTPS) is included.
Fragmentation of only the SNI string to minimize slowdown.
Minimize access problems through whitelisting.
It is used by specifying a DNS server through packet bypass without changing Windows settings.
You can easily check the information of the accessed site.

Recommended settings let you use the program smoothly by adding exceptions only for the sites you need.

Version 3.9.2 (2026/07/07)
- Added a new Fake Packet option for stronger bypass compatibility
- Improved connection success rate and stability on some networks
- Improved the network connection method for better compatibility across various environments
- Added an easy toggle to enable or disable the Fake Packet feature
Version 3.9.1 (2026/06/12)
- Applied Fragment Extension support across all internet providers, including KT users
- Changed Fragment Extension to be enabled by default on new installations
Version 3.9.0 (2026/05/23)
- Fixed startup and display issues caused by errors in some security software, including nProtect, Fasoo, and MarkAny
- Removed loading indicator that could conflict with errors in some security software
- Improved stability in environments affected by security software errors
Version 3.8.9 (2026/04/28)
- Improved handling of shutdown and restart issues on certain systems
- Enhanced stability by reducing delays and handling edge cases on some PCs
- Improved overall stability and reliability

SecretDNS is freeware.
You can use it freely in any setting, including offices, homes, government offices, and schools.
You may distribute it freely anywhere.

Download
(Windows)

Download
(macOS)

Play Store
(Android)

Why should I use the recommended settings?
You can easily use features such as DNS tampering protection and SNI eavesdropping protection while maintaining both speed and security.
Does SNI fragmentation reduce speed?
No. This program fragments only the SNI string, minimizing any reduction in speed.
Do the DNS settings change Windows system settings?
No. The program uses its own DNS settings (DNS over HTTPS) without changing Windows settings, making it stable and secure.
How can I fix it when I can’t access a particular site?
You can minimize access issues by configuring a whitelist or a list of specified domains.
Can I use it without installing it?
Yes. A portable version is available, so you can use it right away without installation.