🔨 Event Builder
Create and configure your Nostr event
Your private key never leaves your browser
Text content for your note
📋 Event Preview
Review and publish your event
Unsigned Event
Create an event to see preview
Create, sign, validate, and publish Nostr events for testing
Create and configure your Nostr event
Your private key never leaves your browser
Text content for your note
Review and publish your event
Create an event to see preview
User profile information (name, about, picture)
{
"name": "Alice",
"about": "Nostr developer",
"picture": "https://example.com/pic.jpg"
}
Standard text post, like a tweet
Hello Nostr! 👋
Following list with relay recommendations
Tags: ["p", "pubkey1"], ["p", "pubkey2"]
React to another event (like, emoji)
Content: "+" or "❤️" Tag: ["e", "event_id"]
A valid event needs: kind (number), content (string), tags (array), created_at (unix timestamp), pubkey (hex), id (sha256 hash), and sig (schnorr signature).
Events are signed using Schnorr signatures over secp256k1. This proves the event was created by the owner of the private key without revealing the key itself.
The event ID is the SHA-256 hash of the serialized event: [0, pubkey, created_at, kind, tags, content]
Tags create references and metadata. Common tags: ["e", "event_id"] for replies, ["p", "pubkey"] for mentions, ["t", "hashtag"] for topics.
Yes! You can create and sign events to see the JSON structure and validate signatures without publishing to relays.
All cryptographic operations happen in your browser. Your private key never leaves your device or gets sent to any server.