🔬

Mobile DevTools

Inspect any page on your phone — console, network, and storage — with no local server and no install. Start with Option A (proxy, instant, works on any device). Option B (bookmarklet) is a fallback for the rare site that blocks framing, and works best on desktop.

A
Proxy InspectorInstant
1

Open this page on your phone browser — kerneltools.dev/mobile

2

Tap "Open Proxy Inspector →" below

3

Type any URL in the bar that appears (e.g. example.com) and tap Go

4

The page loads in a frame. Tap the floating 🔬 DevTools button at the bottom-right to open Console / Network / Storage

If a site blocks iframes (keeps redirecting), use Option B instead.

B
Bookmarklet InspectorDesktop-friendly

Reliable on desktop. On Android Chrome specifically, tapping a saved javascript: bookmarklet often doesn't run at all — a browser-level restriction, not something this site controls. If it doesn't work for you, Option A above covers the same ground for almost every site.

Step 1 — Add the bookmarklet (do this on desktop)
🔬 Kernel DevTools← Drag to your bookmarks bar
Can't drag? Add it manually on mobile
Copy the bookmarklet code first:
javascript:(function(){function openPanel(){var w=window.open('https://kerneltools.dev/mobile?mode=popup&sid=3ttlns4c&url='+encodeURIComponent(location.href),'kdev','width=430,height=700');if(!w){alert('Kernel DevTools: the popup was blocked. Please allow pop-ups for this site, then tap the bookmarklet again.');}return w;}if(window.__kdevLoaded){if(window.__kdevPanel&&!window.__kdevPanel.closed){window.__kdevPanel.focus();}else{window.__kdevPanel=openPanel();}return;}window.__kdevLoaded=true;window.__kdevPanel=openPanel();var s=document.createElement('script');s.src='https://kerneltools.dev/agent.js';s.dataset.kdevMode='bookmarklet';s.dataset.kdevSid='3ttlns4c';document.head.appendChild(s);})();
Chrome (Android)
1

Bookmark any page — tap ⋮ → Star

2

Open Bookmarks → find it → long-press → Edit

3

Replace the URL field with the copied code → Save

Safari (iPhone)
1

Bookmark any page — Share → Add Bookmark

2

Open Bookmarks → find it → Edit

3

Replace the URL with the copied code → Done

Step 2 — Use it on any page
1

Navigate to any page you want to inspect on your phone

2

Android Chrome: tap the address bar, start typing Kernel DevTools, then tap it in the suggestions — not the Bookmarks menu. On desktop or other browsers, just click it on your bookmarks bar.

3

A DevTools popup opens showing Console, Network, and Storage in real time. (Opening it from the Bookmarks menu instead of the address bar is the #1 reason it silently does nothing on Android Chrome — that menu opens as its own page with no memory of what you were just looking at, so there's no page left to inspect.)

4

Tap it again on the same page to re-focus the popup if you closed it. If nothing opens and Chrome shows a small "Popup blocked" bar, tap Always show for this site

Your session ID (fixed for this bookmarklet):
3ttlns4c

To also stream data into the Kernel Extension on desktop: open Ctrl+Shift+Y → 📱 Mobile tab → enter this session ID.

💡
Which option to pick? Start with Option A — it works instantly with no setup. Switch to Option B if the site uses a frame-buster (the page keeps redirecting instead of loading), since the bookmarklet injects directly into the page without any iframe.