DevToolbox

Web Network Inspector — See a Site's Requests on Mobile

Open any site through a proxy and watch the API calls it makes — filter them and copy any request as cURL, right from your phone.

Heads up: unlike the other tools here, this one routes the target site through a server proxy. Only use it on sites you own or are authorised to test — never to sign into accounts. Complex apps and bot-protected sites may not render fully.
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Enter a URL and press Load. The page opens through a rewriting proxy so its requests can be captured.
  • No requests captured yet. Interact with the page — clicks, scrolls and searches usually trigger XHR/fetch calls.

Select a request to see headers, payload and copy it as cURL.

Phone browsers have no developer tools, so there is no way to open a site and watch the API calls it fires. This tool loads the target through a server-side rewriting proxy: the page renders normally, you tap and scroll as usual, and an injected interceptor records every fetch, XMLHttpRequest and WebSocket the page makes.

Each captured request shows its method, status, timing, request headers and body, and — for JSON/text responses — a body preview. One tap copies it as a ready-to-run curl command or a fetch() snippet.

Because it runs through a proxy on a server rather than in your browser, it is different from the other tools here: use it only on sites you own or are authorised to test. Some complex sites (heavy single-page apps, aggressive bot protection, login-gated pages) will not render perfectly through the proxy.

Features

  • Works on mobile — no desktop or USB debugging needed
  • Captures fetch, XHR and WebSocket calls the page makes
  • Per-request method, status, timing, headers and payload
  • Response body preview for JSON, text and XML
  • Filter by URL and by request type
  • Copy any request as cURL or as a fetch() snippet

How to use it

  1. Type the site's URL and press Load.
  2. Interact with the page inside the frame — tap, scroll, search, submit.
  3. Watch requests appear in the log on the right (or below, on mobile).
  4. Tap a request to see its headers and body, then copy it as cURL.

Frequently asked questions

Why does the page look broken or not load?

The proxy rewrites HTML, CSS and scripts so their requests route back through it. Sites that rely on service workers, strict CSP, WebGL, or bot-detection (e.g. Cloudflare challenges) often will not render fully. It works best on content sites and straightforward web apps.

Is this private like the other tools?

No. Unlike the rest of DevToolbox, this tool sends the target URL and traffic through a server. Do not use it to log into accounts or to inspect sites you do not control.

Can it capture requests made before the page finished loading?

The interceptor is injected at the top of the document, so it catches almost everything. A few very early inline requests may be missed.

Does it show the response body?

For JSON, text and XML responses it shows a truncated preview. Binary responses (images, fonts) show headers and size only.

Last updated September 10, 2026.