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Quickly connect to WebSocket servers, send and receive messages in real-time, and monitor communication status online.
Supports ws:// and wss:// protocols. You can use a public echo service for testing.
After connecting to a WebSocket service, sent and received messages will be displayed here in chronological order.
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
A WebSocket keeps a two-way connection open after the server accepts the opening handshake. Either side can then send messages without starting a separate request for each one. This tester lets you enter a ws:// or wss:// address, connect from your browser, send text, and inspect connection events and messages in a chronological log. A JSON payload can be sent as text, but the receiving service must understand its structure.
The log separates system events, outgoing messages, and incoming messages. Each entry is timestamped using your device’s local clock. The summary counts logged entries and sent and received messages; it does not measure server-side processing time or prove that an application workflow succeeded.
An open connection shows that the browser completed a WebSocket session with the endpoint. It does not confirm that a subscription, login, command, or business operation worked. You must send a message in the format expected by the service and judge its reply against that service’s own protocol. The WebSocket standard describes the handshake and message channel; application-specific meaning belongs to the server.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Use an endpoint you are authorized to test. Enter its complete address, including the ws:// or wss:// scheme, hostname, port if needed, and resource path.
Choose wss:// for a secure endpoint. If the page is loaded over HTTPS, browsers commonly block an insecure ws:// connection as mixed content; local development may have browser-specific exceptions.
Select Connect and watch for the connecting, connected, error, or closed event. A server may accept the connection but still reject or ignore messages that do not match its application protocol.
After connection, enter a short, non-sensitive text message and choose Send Message. For JSON-based services, paste valid JSON as text. Check both the outgoing log entry and any incoming response.
Choose Disconnect when finished. Copy the log if you need a record, or clear it before another test. The on-screen history is limited to the most recent 500 entries.
Example: Connect to a test echo endpoint you control, send {"type":"ping"}, and check whether the expected text appears in the received direction. The particular response depends on that endpoint; an echo response is not guaranteed for every server.
Use cases
See how the tool fits into real work and everyday tasks.
A developer can connect to a local or test WebSocket service, confirm that the session opens, then send one harmless sample. A failed connection points toward address, network, browser security, origin policy, or server configuration; an open session with no useful reply points toward message handling or the service’s expected format.
When investigating notifications or live updates, leave the session open briefly and review received text alongside connection and close events. This is a manual snapshot for debugging, not a persistent monitor or a load test.
For either use, compare the log with the server’s documented message contract. A syntactically valid JSON string can still be the wrong command, topic, or authentication step.
Q&A
Find concise answers to common questions and confusing cases.
No. This tester provides a URL and text message field, with no controls for custom handshake headers or subprotocols. If your endpoint requires either, use a client that supports the required handshake options or a purpose-built test client.
Check the full URL and path, port, server availability, TLS certificate, and whether the service accepts connections from the page’s browser origin. HTTPS pages may also be blocked from opening an insecure ws:// connection. Browser error events do not always expose the server’s precise rejection reason, so check server-side logs as well.
This page sends text only. Incoming binary messages appear as a placeholder rather than a readable payload. It also has no assertion rules, repeat schedule, or concurrency controls, so use automated tests or a protocol-specific client for those tasks.
Notes
Review scope, result limitations, and important precautions before use.
Only connect to services you have permission to test. Do not send passwords, access tokens, personal data, or production commands to an endpoint unless its owner has approved that use. A URL may contain sensitive query parameters; treat copied logs accordingly. Prefer wss:// when the endpoint supports it, especially for connections over public networks.
The browser and server both influence whether a connection succeeds. A successful session does not validate authorization, business logic, reliability under load, or production readiness. The log uses the device’s local clock and retains at most 500 recent entries; it is not a durable server-side audit record. Binary incoming data is not displayed as a payload.
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