Developer Toolbox

CodeGrid

About this app

Your IDE is on the desk. Your bugs are on the phone. DevToolbox puts the checks you keep reaching for a cable to do right into your pocket.

DEVICE INFO
Everything about the phone in your hand: build fingerprint, security patch, supported ABIs, density bucket and smallest width, refresh rate, RAM and storage, battery health, local IP addresses, WebView and Play Services versions, and whether developer options and USB debugging are on. Tap any value to copy it, or export the whole report as JSON.

APP INSPECTOR
Pick any installed app and see what the system knows about it: min, target and compile SDK, installer source, install and update dates, data and native library paths, and the flags developers care about such as debuggable, allowBackup and largeHeap. The Signing section shows the SHA-1 and SHA-256 fingerprints that Firebase, Maps and Google Sign-In ask for. Permissions are listed with their protection level and whether they are granted. Every activity, service, receiver and provider is listed with its exported state.

APK EXTRACTOR
Export any installed app as a single .apk, or as an .apks bundle that includes every split so it installs cleanly elsewhere. Share it straight from the app or save it to any folder.

DEEP LINK TESTER
Type a URL or custom scheme and see every app that can handle it, which one is the default, and whether App Links verification passed for the host. Open the link directly, pick a handler, or copy the equivalent adb command.

SHARE INSPECTOR
Share text, a link, an image or files from any app into DevToolbox and see the exact intent that arrived: action, MIME type, flags, every extra with its type, and each content URI with its name, size and readability.

APK ANALYZER
Open an .apk file from storage and inspect its manifest, signing certificate, permissions and components without installing it. See whether an older or newer version is already on the device.

DP / PX / SP CONVERTER
Convert between dp, px, sp, pt, mm and inches using the real density and font scale of the device you are holding, or simulate another density bucket to preview how sizes will land elsewhere.

NOTIFICATION TESTER
Post notifications with any channel importance, style, action count and delay to see exactly how this device and OEM render them, including heads-up behaviour.

SENSORS AND HAPTICS
Live readouts from every sensor, with range, resolution and reporting mode. Play every predefined vibration effect, composition primitive and view haptic constant the device supports, or build your own pattern.

DEVELOPER SHORTCUTS
One tap into developer options, app info, notification channels, special app access pages, display, locale and more.

UTILITIES
The classic helpers are still here for when you are away from your desk: JSON formatter, Base64, JWT decoder, hash generator, epoch converter, color converter, regex tester, text diff, UUID generator and URL encoder.

PRIVATE BY DESIGN
DevToolbox has no internet permission and does not use QUERY_ALL_PACKAGES. Nothing leaves your phone unless you choose to share it. Apps with a launcher icon are listed; background-only system services are not.

Dark and light themes, tablet layouts, and no accounts or sign-in.

What’s new

DevToolbox 2.0 is built for Android developers, on Android.

NEW: Device Info, App Inspector with signing SHA-1/SHA-256, APK Extractor (.apk and .apks with every split), Deep Link Tester with App Links verification, Share Intent Inspector, APK Analyzer, dp/px/sp Converter, Notification Tester, Sensors & Haptics, Developer Shortcuts.

No QUERY_ALL_PACKAGES, no internet, nothing leaves your phone. Your JSON, JWT, hash and regex tools are still here under Utilities.