7 tools available

Network Tools

API clients, WebSocket, CIDR and more.

Test REST APIs, WebSocket and SSE connections, calculate CIDR ranges, and invoke bulk HTTP requests from your browser.

Browse 7 tools All categories

Tools

Always

Free

100%

Private

Runs in

Browser

Live in your browser

Global network connectivity visualization

api client websocket tester cidr calculator

Top picks in Network

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API Client

Send REST HTTP requests with headers, body and view responses.

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CIDR Calculator

Calculate subnet ranges, network/broadcast addresses and host counts.

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WebSocket Tester

Connect to WebSocket endpoints and send/receive messages.

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All Network tools

7 utilities, sorted by popularity.

7 total

SSE Client

Subscribe to Server-Sent Events streams and view live messages.

Bulk API Invoker

Run multiple HTTP requests with configurable concurrency.

SOAP Client

Send SOAP XML requests and inspect XML responses.

gRPC Client

Call gRPC-web services (requires CORS-enabled grpc-web endpoint).

Why people use them

Built for speed, designed for trust

Privacy first

Every transformation happens locally in your browser. Nothing is uploaded — even sensitive content stays on your device.

Instant results

No spinners, no servers, no waiting. Tools react as you type, so you stay in your flow.

No account, no limits

Use everything for free, forever. There is no signup, no quota and no upsell hidden in a side panel.

About Network Tools

Network debugging belongs in the browser when your data stays local. These tools help developers test endpoints, protocols and IP ranges with clear CORS guidance.

#api-client #websocket-tester #cidr-calculator #sse-client #rest-client

Photos by Unsplash contributors — unsplash.com .

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