Cookies, headers, API calls, DOM mutations — every data stream across every tab, captured and reshaped from a single command panel.
Everything you need to inspect, transform, test, and understand JSON and APIs — no backend required.
Tree, raw & table views with live filtering, search, and path copying.
Postman-like request builder with auth, env variables, pre-request scripts, and response tests.
Base64, URL, and HTML entity encoding/decoding plus SHA hash generation.
Decode, validate, and generate JWT tokens with custom payloads and refresh tokens.
Convert between CSV and JSON with customizable delimiters and headers.
Auto-generate TypeScript interfaces from any JSON structure.
Test regular expressions with syntax highlighting and match visualization.
Convert between HEX, RGB, HSL, and HSV color formats with live preview.
Generate QR codes from any data or scan QR codes to extract information.
Real-time WebSocket testing with message history, filters, and export.
Compare two JSON objects side-by-side with added, removed, and changed highlights.
Edit any header, delete any field, inject new values — then replay and watch the response update live.
Visualize JSON as an interactive node graph with pan and zoom.
Live markdown preview with syntax highlighting and export options.
Save API requests and JSON samples locally, organized by collection.
Filter by type, method, status, or URL pattern. The waterfall reshapes around your focus — not the other way around.
Toggle filters to reshape the stream in real time
Mutations tracked in real time. Click any node to inspect attributes, text content, and change history without leaving the panel.
Click nodes to expand · Mutations highlighted in violet
Click a node
to inspect
Not just HTTP. Intercept catches live WebSocket frames, binary payloads, and ping/pong cycles as they arrive.
Real-time frames arriving from ws://app.example.com/ws
Edit any header, delete any field, inject new values — then replay the request and watch the response update live.
Edit headers, inject values, replay — see the modified response
I found a token leaking through a third-party iframe in 4 minutes. Would have taken half a day in DevTools.
The DOM mutation tracker caught a race condition in our React app that had been silently corrupting state for 3 sprints.
Intercept is the first browser extension I've trusted enough to use on production traffic. The zero-telemetry guarantee sealed it.
One click. No account. No telemetry. The extension starts capturing the moment you open a tab.
You've been using Intercept for 2 minutes.
Install it. The real one does more.