Free tools for APK makers

Small, single-purpose tools for the jobs around an Android app — linking your website, sharing and installing APKs, and preparing a Google Play release. They all run in your browser; nothing is uploaded.

Free toolassetlinks.json GeneratorMake links to your website open in your Android app with a valid Digital Asset Links file.Free toolGoogle Play Referrer Link BuilderCreate Play Store links with UTM install-referrer tags to track where installs come from.Free toolAPK Download Page GeneratorBuild a one-file install page with icon, download button, QR code and install steps.Free toolGoogle Play Release Notes FormatterWrite 'What's new' notes per language with the right tags and a 500-character check.Free toolAndroid Color Converter (ARGB ⇄ Hex)Convert CSS #RRGGBBAA to Android #AARRGGBB, Compose and Flutter colours without alpha mix-ups.Free toolSHA-1 / SHA-256 Key Hash ConverterTurn keytool fingerprints into Facebook key hashes, plain hex or Base64 — and back.Free toolAPK Download Time CalculatorSee how long your APK takes to download on 3G, 4G, 5G and Wi-Fi — and the data it uses.Free toolAPK Install Instructions GeneratorWrite friendly, phone-specific install steps to send with your APK link.