Coders Hub logoCoders Hub

WebSocket Tester

Open a live WebSocket connection, send frames and read replies.

Support
Works Offline
Privacy First
No Login
No API
WebSocket

The socket is opened directly by your browser — no relay, no server of ours in the middle. Pages served over HTTPS can only connect to wss:// endpoints.

Status
closed
Sent
0
Received
0

Message

Transcript

  • No frames yet — connect and send a message.

About the WebSocket Tester

Connect to any ws:// or wss:// endpoint straight from your browser, send text or JSON frames and watch every message arrive in a colour-coded transcript with timestamps, sent and received counters and close codes. It uses the native WebSocket API, so the connection is between your tab and the server only — no relay, no logging, nothing stored.

Examples

Echo server

wss://echo.websocket.events
> hello from coders-hub

Output

12:04:31  open    connected
12:04:33  sent    hello from coders-hub
12:04:33  recv    hello from coders-hub

JSON subscribe frame

wss://example.com/stream
> {"action":"subscribe","channel":"prices"}

Output

12:06:02  sent    {"action":"subscribe","channel":"prices"}
12:06:02  recv    {"channel":"prices","status":"ok"}

Keyboard shortcuts

  • Copy the main outputCtrl / ⌘ + Shift + C
  • Download the resultCtrl / ⌘ + S
  • Share this toolCtrl / ⌘ + Shift + S
  • Reset the inputsAlt + R
  • Open the tool search paletteCtrl / ⌘ + K

Related tools

cURL Command Parser

API & HTTP

Parse a curl command into method, URL, headers, and body.

cURL to Fetch Converter

API & HTTP

Convert a curl command into JavaScript fetch() code.

GraphQL Query Formatter

API & HTTP

Format and indent GraphQL queries and mutations.

GraphQL Schema Viewer

API & HTTP

Browse a GraphQL SDL schema's types, queries, and mutations.

HTTP Request Builder

API & HTTP

Send live API requests and generate curl, fetch, axios snippets.

Webhook Request Inspector

API & HTTP

Inspect a pasted webhook request and verify its HMAC signature.

Frequently asked questions

Read more

Version 1.0.0 · Updated 2026-08-13 · Runs entirely in your browser