Mobile dev tools.
Browser-based.
Every tool here runs entirely in your browser. No installs, no accounts, no tracking of what you test, and no ad-laden sign-up flows. Free as in coffee; the only thing supporting them is the small ad placement at the side.
Available now
Deep Link Tester LIVE
Paste any deep link, get a clickable URL plus a QR code to test on a real device. Detects URI schemes vs universal links, parses URL components, keeps a local history.
Open tool →ADB Command Generator LIVE
Build the exact adb shell am start command for testing Android deep links from a terminal.
Package targeting, intent extras, common flags, and seven ready-made recipes.
FCM Notification Preview LIVE
Paste a Firebase Cloud Messaging payload, see exactly how it renders on Android lockscreen, the notification shade (collapsed and expanded), as a heads-up banner, and on Wear OS.
Open tool →Intent-Filter Generator LIVE
Paste a URL pattern, get the right AndroidManifest <intent-filter> XML,
with the correct path attribute and autoVerify handled. Plus a built-in URL match tester.
Commands Cheatsheet LIVE
Searchable reference of ~60 ADB, Firebase, logcat, App Links, and build commands every Android dev re-Googles. Copy-ready, organized by category.
Open cheatsheet →Material 3 Theme Generator LIVE
Pick a seed color, get the full Material 3 color scheme as Kotlin:
lightColorScheme and darkColorScheme with all 30+ roles,
ready to paste into your Compose Theme.kt.
Logcat Filter Builder LIVE
Build adb logcat commands from a form (tag filters, priority levels, app PID,
output format, buffers), or paste a logcat command and get plain English back.
App Icon Variant Badger LIVE
Add a DEV / STAGING / BETA label to your Android app icon. Pick style, corner, and colors, then download as a ready-to-use mipmap density bundle ZIP.
Open badger →strings.xml Escape Fixer LIVE
Fix Android strings.xml escape errors: apostrophes, format args, leading
@ or ?, HTML markup. Deterministic round-trip in both directions.
Manifest Compatibility Helper LIVE
Generate the right AndroidManifest.xml snippet for any combination of
orientation, aspect ratio, target SDK, and form factors, including the Android 16
large-screen rules.
In development
AASA + assetlinks.json Validator SOON
Validate your Universal Links and App Links setup. Fetches both
apple-app-site-association and assetlinks.json, runs all the
format checks Apple and Google actually require, and cross-references your app's
signing fingerprints.
Missing something?
Got a workflow that doesn't have a good free tool? Tell us. Every tool here started as someone's frustration with the existing options. Yours might be next.
Suggest a tool →Sister sites · from the same author
Schema Preview
schemapreview.com →
Schema markup, with the preview Google would actually show. Generate JSON-LD for 8 rich-result types with pixel-accurate SERP previews. No signup.
Cron Preview
cronpreview.com →
Build, validate, and preview cron expressions across Unix, AWS EventBridge, GitHub Actions, Vercel, Kubernetes, Quartz and Spring, with timezone-correct next-run previews.