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Decompile, Modify & Sign Android APKs Online

Full-featured mobile-friendly APK & AAB engineering suite at https://apk.zoomnearby.com/. Decompile resources, modify Smali bytecode, adjust permissions, and sign with production-ready V1/V2/V3/V4 schemes directly in your browser.

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APKTool Studio Terminal v1.0
✔ Upload: app-release.apk (42.5 MB)
âš™ Decompiling dex & binary XML...
➜ Smali code disassembled successfully.
âš¡ AI Translation: strings.xml translated
✔ Recompiled & V2 Signed: output-signed.apk
Status: Ready for installation
V1/V2/V3/V4 Signatures AAB Support

Everything You Need for APK Engineering

Powerful cloud tools designed for Android developers, security analysts, and app publishers.

Fast APK Decompilation

Disassemble Android package files into human-readable Smali assembly, XML layouts, strings, and assets with 100% accuracy.

In-Browser Smali Editor

Built-in syntax-highlighted code editor allowing you to inspect registers, modify logic, and patch resources directly from mobile or desktop.

AAB to APK Converter

Seamlessly convert official Google Play Android App Bundles (.aab) into standalone APK packages using Google Bundletool technology.

Keystore & APK Signing

Generate custom RSA cryptographic keystores or use existing keys to sign APK binaries with V1, V2, V3, and ZipAlign optimizations.

AI Localization & Patching

Leverage integrated AI models (Gemini & OpenAI) to translate strings.xml files into 30+ languages automatically without corrupting tags.

100% Mobile Friendly

Responsive web interface optimized for phones, tablets, and desktops so you can inspect and sign APKs anywhere, anytime.

50,000+
APKs Decompiled
99.9%
Build Success Rate
20,000+
Active Developers
< 15s
Avg. Processing Time

How APKTOOL Studio Works

A simple 4-step workflow to decompile, modify, and release Android apps.

1

Upload APK / AAB

Upload your Android package or app bundle through our secure browser dashboard. Workspaces are refreshed daily.

2

Decompile & Edit

Inspect disassembly, translate strings.xml with AI, or update manifest permissions.

3

Recompile & Sign

Reassemble resources, run ZipAlign optimization, and sign with V2/V3 certificates.

4

Download & Deploy

Download your ready-to-install signed APK. Workspaces are automatically cleaned up everyday at 00:00 UTC (5:30 AM IST).

Helpful Blogs & Tutorials

Master Android decompiling, Smali editing, and app signing.

View All Articles
Security & Signing

Mastering APK Key Rotation and Signing Lineage: Implementing Scheme v3 and v3.1 in Recompiled APKs

Learn how to configure APK Signature Scheme v3 and v3.1 key rotation. Master generating signing lineage proofs, managing keystore transitions, and resolving verification errors when re-signing modified APKs.

9 min read Read More
Tutorials

Bypassing Root Detection and Play Integrity Attestation in Decompiled APKs: Smali Patching Guide

Learn how modern Android apps detect root environments and Play Integrity attestation. Master Smali bytecode patching to neutralize SU checks, Magisk detection, and client-side integrity validation.

11 min read Read More
Reverse Engineering

Merging Split APKs (XAPK and APKS) into a Single Unified APK: Complete Decompilation and Manifest Consolidation Guide

Learn how to merge modern Android Split APKs and multi-APK app bundles into a standalone, re-signable APK. Master manifest unification, resource table consolidation, and MultiDex merging using APKTool Studio.

9 min read Read More
Help Center

Frequently Asked Questions (32)

Everything you need to know about APK decompiling, Smali editing, AAB conversion, and signing on https://apk.zoomnearby.com/.

APK Tool Studio (available at https://apk.zoomnearby.com/) is a cloud-based web application that allows developers, QA engineers, and security researchers to decompile, edit Smali assembly, convert AAB bundles to APKs, generate keystores, and sign Android binaries in the browser.

No local installation is required. Everything runs on our high-performance cloud servers equipped with Apktool, Bundletool, JarSigner, and ZipAlign utilities.

Yes! The platform is designed to be 100% responsive across smartphones, tablets, and desktop browsers, allowing you to edit and sign APKs on the go.

You can upload standard Android Package files (.apk), Android App Bundles (.aab), custom Java keystores (.jks or .keystore), and JSON/XML configuration files.

Processing times typically range between 5 and 15 seconds depending on file size and framework complexity (e.g. Flutter or React Native).

Standard user accounts receive allocations for decompilation, compilation, key generation, and APK signing, with quota expansions available directly in the user dashboard.

Decompiling extracts compiled DEX bytecode into human-readable Smali assembly language and converts binary XML layout/string resources into plain editable text.

Yes! You can modify package names, permission requirements, activity declarations, intent filters, and debug flags directly in our browser code editor.

Smali is an assembler/disassembler for the .dex format used by Dalvik and Android Runtime (ART). It represents Java bytecode in low-level register assembly syntax.

You can change conditional jump instructions (such as if-eqz or if-ne) to unconditional jump instructions (goto) or invert the registers in the built-in Smali editor.

Yes! All extracted XML files in res/values/ can be edited manually or auto-translated using our integrated AI localization features.

Recompilation errors usually occur due to invalid XML syntax, mismatched Smali registers, missing resource identifiers, or corrupted asset files. Use the build error log output to pinpoint line numbers.

Yes! We support large Flutter, React Native, Unity, and native Android packages up to 512 MB in size.

AAB is Google Play mandatory publishing format. It contains compiled code and resources separated into dynamic modules, split by device ABI, density, and language.

While AABs are required for Play Store submission, physical devices and third-party stores require standard .apk files for direct installation and side-loading.

Our server uses Google official Bundletool utility to build an APK set (.apks) and extract a universal standalone APK compatible with all Android devices.

Yes! Simply upload your .aab file to https://apk.zoomnearby.com/ from your mobile browser and download the generated universal APK.

Yes, converted APKs can be signed automatically with a test certificate or your own custom keystore during conversion.

You can upload AAB files up to 512 MB per project.

Android Operating System refuses to install unsigned APK packages. Cryptographic signatures verify authorship and prevent unauthorized binary tampering.

V1 signs individual ZIP entries (legacy). V2 signs the entire ZIP archive (Android 7+). V3 supports key rotation, and V4 supports streaming installs on Android 11+.

Yes! You can generate RSA-2048 or ECC keystores with custom aliases, passwords, and organizational attributes directly in the Keystores tab.

Yes! You can securely upload existing Java keystores to sign compiled APKs.

ZipAlign aligns uncompressed data on 4-byte boundaries relative to file start, reducing RAM usage when running the application on Android OS.

Yes! Any generated or saved keystore can be downloaded to your local device at any time.

The signing step will fail with an authentication error. Verify alias name and key password before re-trying.

Integrated AI models (Gemini & OpenAI) parse XML string values and translate them into 30+ target languages while preserving Android placeholders like %1$s.

Yes! Provide a text prompt and built-in AI image models generate multi-resolution launcher icons for hdpi, xhdpi, xxhdpi, and xxxhdpi folders.

No. Uploaded files and extracted project sandboxes are stored temporarily and automatically purged after project completion or session expiration.

Never. We do not sell, license, or expose your uploaded binaries or source projects to third parties.

Yes! You can enter your personal API keys in AI Configuration Settings to use custom model parameters.

Developer documentation for CLI tools and API endpoints is available at https://apk.zoomnearby.com/docs.php.

Ready to Decompile & Sign Your Android Apps?

Empower your Android development workflow with fast cloud decompilation, Smali bytecode editing, and multi-scheme APK signing.

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