Three common formats

  • Base64 node list — decodes to lines of vmess:// and vless://. 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.
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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.