Generate WireGuard VPN configuration files with key pair generation and peer configuration.
This tool creates a Curve25519 private/public key pair, optionally a preshared key, and drops them into the [Interface] and [Peer] sections of a standard WireGuard .conf file alongside the address, endpoint, and AllowedIPs you supply. The part people get wrong: the public key you hand to the other side is mathematically derived from your private key, so if you regenerate keys after deploying a config, that peer's copy of your public key goes stale and the tunnel stops negotiating until both ends are updated together.
The tool generates 32 random bytes for the private key, clamps them per the Curve25519 convention (clearing and setting specific bits so the scalar is valid for X25519), and derives the public key by multiplying the curve's base point by that scalar. Both values are base64-encoded, matching the output format of the wg genkey / wg pubkey command-line tools.
Your entered address, listen port, DNS, endpoint, AllowedIPs, and keepalive interval are inserted into a plain-text template with [Interface] and [Peer] headers. No values are validated against a live network - the tool only checks that fields are present and formatted (CIDR notation, host:port), not that the endpoint is reachable or the subnet is free.
Yes. WireGuard keys are always 32-byte Curve25519 scalars or points, base64-encoded to 44 characters ending in '='. A key generated here is interchangeable with one from the official wg command-line tool - the underlying math is identical, only the implementation differs.
The generation itself runs client-side in JavaScript, so nothing is transmitted during key creation. That said, you are responsible for how you subsequently copy, paste, or store the private key - treat it like any other secret and don't paste it somewhere it could be logged.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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