V2-RAY.online
What is VLESS?
VLESS is a data-transfer protocol in the Xray ecosystem. It handles client authorization, while the transport and security layer, such as XHTTP with TLS or TCP with REALITY, determine how the connection is carried.
Updated: 2026-08-23
Connection components
A complete profile contains the server address, port, user UUID, transport, and security parameters. VLESS is not an application by itself: the device needs a compatible client with an Xray-core version that supports the selected transport.
Parameters belong to a specific server profile. XHTTP path, SNI, fingerprint, and security fields cannot be mixed between unrelated nodes.
Subscription URL
A V2-RAY.online subscription returns the currently available profiles through one renewable URL. Refreshing that URL lets the app receive profile updates without copying each VLESS URI manually.
The subscription URL is an access secret. Reissuing it invalidates the previous URL and requires the new one to be imported on personal devices.
Separate layers
- VLESS identifies the user and carries payload data.
- XHTTP, WebSocket, or TCP define the transport.
- TLS or REALITY protect connection establishment.
- DNS resolves host names and can fail independently.
- The client app manages the system VPN interface and routes.
Limitations
No protocol guarantees identical reachability on every network. Availability depends on the ISP, server route and subnet, packet loss, application version, and exact agreement between client and server settings.
Primary documentation
See the Project X VLESS documentation and Xray-core releases for current technical details.
Frequently asked questions
Is VLESS a VPN app?
No. It is a protocol supported by applications built on Xray-core.
Why does one profile work while another does not?
Profiles can use different servers, routes, transports, and security settings.