Three common formats
- Base64 node list — decodes to lines of
vmess://andvless://. v2rayN supports this natively. - Clash YAML — for Clash-family clients; it also carries proxy groups and rules.
- sing-box JSON — a full outbound configuration for the sing-box core.
Which one to give v2rayN
Prefer the link your provider labels "universal", "V2Ray" or "v2rayN" — that's almost always the Base64 one. If subscription settings offer a conversion toggle you can use it, but conversion goes through a third-party endpoint and is worse for both speed and privacy.
Can't tell which you have
Paste the link into the browser address bar. A long unbroken run of letters and digits is Base64; indented text starting with proxies: is Clash YAML; a leading curly brace is JSON.