Slack Webhook Tester

Send test messages to any Slack incoming webhook and verify your integration is working.

Slack blocks direct browser requests (CORS)

Slack webhooks reject requests from browsers. Use the generated curl or Node.js code below to send from your terminal or server.

Webhook URL

Create a webhook at api.slack.com/messaging/webhooks

Message Builder

Message Text *

Username (optional)

Icon Emoji (optional)

Channel Override (optional)

JSON Payload

{
  "text": "Hello from MegaDevTools! :wave:"
}

Run from Terminal

curl -X POST 'https://hooks.slack.com/services/XXX/YYY/ZZZ' \
  -H 'Content-Type: application/json' \
  -d '{
  "text": "Hello from MegaDevTools! :wave:"
}'

Slack webhooks block browser requests. Copy and run the curl command above in your terminal to send the message.