ProGuard / R8 Obfuscation Checker
Check whether an APK's code is obfuscated with ProGuard or R8 and how thoroughly, from the ratio of readable to short machine-style class and package names.
Drop your file here
or click to choose from your device
About ProGuard / R8 Obfuscation Checker
Check whether an APK's code is obfuscated with ProGuard or R8 and how thoroughly, from the ratio of readable to short machine-style class and package names.
ProGuard / R8 Obfuscation Checker is part of APKLint’s decompile & reverse engineering toolkit — Turn a built app back into readable code and resources. It’s free to use and needs no account.
Your privacy is the default: files you upload are processed on our servers over an encrypted connection and permanently deleted by a scheduled hourly cleanup after analysis finishes, and never shared.
What ProGuard / R8 Obfuscation Checker checks
- Estimates how much of the code is name-obfuscated
- Flags short, machine-style class and package names (a, b, c…)
- Reports the ratio of readable vs obfuscated identifiers
- Tells you whether R8/ProGuard appears to have run
Good to know: This is a heuristic read of obfuscation strength, not proof a mapping file exists or that secrets are hidden.
When to use ProGuard / R8 Obfuscation Checker
- Best for
- Judging how obfuscated an APK is, how much of the code is name-mangled by ProGuard/R8, before you attempt to read or decompile it.
- Not the right tool for
- Not a decompiler itself and not proof that secrets are hidden; it measures obfuscation, it does not extract code.
- What you get back
- A heuristic obfuscation read: the share of short/renamed identifiers and signs of shrinking/renaming.
- How it differs from related APKLint tools
- The decompile tools try to recover code; this one tells you in advance how hard that will be on a given APK.
- Limitations
- A heuristic estimate of name-obfuscation strength, not a guarantee about mapping files or hidden data.
How to use ProGuard / R8 Obfuscation Checker
- Choose your APK file — Drop an .apk file onto the page, or click to select it from your device.
- Send securely — The file is uploaded over an encrypted connection to our analysis servers.
- Read your report — APKLint unpacks and inspects the package and lays out the results on screen.
- Your file is removed — It's deleted by an hourly cleanup job after analysis finishes.
Why use APKLint
Every tool is free with no login and no paywall. Reasonable file and input limits keep the free service stable.
A clean, focused interface with no third-party ad banners cluttering your results.
Files you upload are deleted by a scheduled hourly cleanup after analysis finishes, and never shared.
Built on jadx and apktool for decompiling and disassembly.
Start immediately — no account, login, or email required.
Runs in any modern browser, on desktop or mobile.
Frequently asked questions
What does ProGuard / R8 Obfuscation Checker do?
Check whether an APK's code is obfuscated with ProGuard or R8 and how thoroughly, from the ratio of readable to short machine-style class and package names.
Why does obfuscation matter?
Obfuscation makes reverse-engineering harder and is recommended for release builds. Low obfuscation means your code is easy to read after decompiling.
Is it free to use?
Yes. Every tool on APKLint is completely free, with no sign-up and no account.
How is my data handled?
Your uploaded file and its result are processed on our servers over an encrypted connection, then removed by the next hourly cleanup after analysis finishes. We never share them.
What files can I send?
An Android APK — a .apk file — up to 1 GB.