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100% Free & Privacy-First Tech Hub
The King of Android APKs, Tools & Tech Guides
Explore 50+ free browser-based Android utilities, verified APK package reviews, detailed tutorials, and privacy-first tech tools.
Instant Utilities
View All 50 Tools
Popular Browser-Based Tools
Zero server uploads, ultra-fast client-side computations, completely free forever.
Android Utility
APK File Information Checker
Inspect APK package name, version, file size, permissions, and compute client-side SHA-256 hash.
Storage Tool
APK Size Calculator
Calculate decompressed app installation footprint, DEX bytecode size, native lib overhead, and cache expansion.
Storage Tool
App Storage Calculator
Calculate phone internal storage breakdown, OS reserve, app installation capacity, and free space safety margins.
Display Tool
Android Screen Size Calculator
Calculate screen physical dimensions (width, height, area) in inches and millimeters from resolution and aspect ratio.
Developer Tool
DPI Calculator
Calculate Android Dots Per Inch (DPI), Density Bucket (mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi), and dp-to-px scaling factors.
Display Tool
PPI Calculator
Calculate Pixels Per Inch (PPI) for smartphones, tablets, and monitors with clarity rating meter.
Calculator
Aspect Ratio Calculator
Calculate and simplify aspect ratios (16:9, 19.5:9, 20:9, 4:3, 21:9) and compute proportional dimensions.
Image Tool
Image Compressor
Compress JPG, PNG, and WebP images client-side with adjustable quality slider and instant download.
Image Tool
Image Resizer
Resize image dimensions by exact pixels or percentage while maintaining aspect ratio.
Image Tool
Image Converter
Convert images between JPG, PNG, WebP, GIF, and BMP formats instantly in your browser.
Image Tool
JPG to PNG Converter
Convert JPEG/JPG images to lossless PNG format with transparency support.
Image Tool
PNG to JPG Converter
Convert PNG images to lightweight JPG format with customizable background fill color.
Verified APK Packages
Browse All Apps
Featured Android Apps & Reviews
Inspected for safety, cryptographic signatures, and privacy permissions.
Brave Privacy Browser is your fast, free, and secure private web browser with built-in ad blocker and tracking…
Verified Clean & Signed
Krita is a full-featured digital painting application designed for concept artists, illustrators, and matte and texture artists.
Verified Clean & Signed
VLC for Android is the best open-source video and music player, fast and easy!
Verified Clean & Signed
Guides & Tutorials
All Guides
Latest Android Tips & Guides
Step-by-step troubleshooting, battery saving, storage fixes, and APK installation guides.
Everything You Need to Know
Frequently Asked Questions
Learn how APK King tools work, how we protect your privacy, and how to make the most of our free utilities.
Yes. All 50+ tools on APK King are completely free forever. There are no subscriptions, no premium tiers, no forced account signups, and no usage limits.
No. Every utility (including our Image Compressor, WebP Converter, QR Code Generator, and APK File Checker) processes everything locally inside your browser sandbox using HTML5 Canvas, Web Crypto API, and File APIs. Your files never touch our servers.
An APK (Android Package Kit) is the file format used by Android to distribute and install applications. APKs are safe when obtained from trusted developers and verified using checksums (SHA-256) and security checkers.
Yes! APK King is built with a responsive, mobile-first design. All calculators, converters, image optimizers, and text utilities are tested and optimized for Chrome, Firefox, Samsung Internet, and Safari on Android and iOS.