WebSocket Tester

Genuinely connect to a WebSocket and send messages.

Free
No signup
Nothing uploaded
No watermark

WebSocket URLclosed

Log

Not connected yet.

How to Use the WebSocket Tester Online

Opens a genuine WebSocket connection and lets you send and receive messages. It connects from your browser rather than through a proxy, so it can reach a server on your own network or behind your VPN that a hosted testing service could never see.

No software to install Free Works on any device

Step-by-Step Guide to Using the WebSocket Tester

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1. Enter a wss:// URL and press Connect
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2. Send messages and watch the log — this really does connect, because WebSockets are not blocked by CORS
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3. Disconnect when you are done

Try it now

What is the WebSocket Tester?

Why Use IP and Network Calculators?

Subnet masks, CIDR ranges and download times all come down to binary maths that is easy to slip on. These calculators do the sums in the page, so you can plan an address range or check a speed claim with confidence.

“One wrong subnet mask can take a whole office offline.”

Subnets worked out instantly
CIDR ranges made clear
Download times estimated
Browser details revealed

Usable host counts shown
IPv4 and IPv6 conversions
MAC addresses checked
No commands to install

Popular Uses for Subnet Calculators

Network jobs at home and at work often start with one of these sums.

Planning an office network Split an address block into subnets for each floor, team or guest WiFi.
Reading CIDR notation See the first address, last address and host count behind a range like /24.
Download estimates Work out how long a large file will take on a given connection speed.
Speed claims Turn megabits per second into megabytes to see what a plan really delivers.
Device lookups Find the maker of a network card from its MAC address prefix.
Browser checks See your user agent and browser details when a support team asks.
WebSocket tests Connect to a WebSocket endpoint and watch messages go back and forth.
IPv6 planning Convert an IPv4 address into IPv6 form while preparing a migration.

What You Can Do with the WebSocket Tester

Shows the network, broadcast and usable host range together, which is the whole answer

Handles IPv6 at full length rather than truncating it for display

Why Use ToolXkit for WebSocket Tester?

Your files stay with you

Everything runs inside your browser. Nothing you open or type is uploaded to a server.

Network Tools for Different Users

Network administrators

Plan subnets, check CIDR ranges and size links for expected bandwidth.

Networking students

Practise subnetting for CCNA and other exams, and check answers quickly.

Developers

Test WebSocket servers, parse user agents and inspect TCP header fields.

IT support staff

Collect browser details and estimate transfer times while helping users.

Small office owners

Understand router settings and IP ranges without calling a technician every time.

Streamers and gamers

Check upload speed, latency and packet loss figures before a stream.

Best Times to Work Out a Subnet

Network calculators help when you are:

Setting up a new router
Studying for a networking exam
Adding a guest WiFi network
Estimating a large upload
Comparing broadband plans
Identifying an unknown device
Moving to IPv6
Debugging a WebSocket connection

Frequently Asked Questions

Answers to common questions about this tool.

Why does my WebSocket connection fail immediately?

Usually one of three things: the page is HTTPS and the socket is ws:// rather than wss://, which browsers block outright; the server rejected the origin; or a proxy stripped the upgrade headers. The browser console distinguishes them, while the connection itself simply closes.

Can this reach a server on my own network?

Yes, and that is the advantage over a hosted testing service. The connection is made by your browser, so anything your machine can reach — localhost, a device on your LAN, a server behind your VPN — is reachable here and invisible to a tester running in someone else’s cloud.

Is WebSocket Tester accurate enough for real network work?

The maths behind addresses and ranges is exact, so the results match what a router expects. Double-check the input, especially the prefix length, since one wrong digit changes the whole range.

Do the calculators scan my network?

No. The subnet and speed calculators only work with the numbers you type in. They send no traffic into your network, and the only tool that connects anywhere is the WebSocket Tester, to the address you enter.

Why is my real download slower than the estimate?

The calculator assumes the full connection speed is available. In practice, WiFi, other devices, server limits and protocol overhead eat into it, so real downloads often take somewhat longer.

Is WebSocket Tester free and private?

Yes. It costs nothing and needs no account. What you type stays in your browser and is never sent to ToolXkit, which matters when it describes a real company network.

What is the difference between Mbps and MBps?

Mbps means megabits per second, the unit broadband plans use. MBps means megabytes per second, the unit most download windows show. One byte is eight bits, so 100 Mbps is about 12.5 MBps.

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