R8 Configuration Analyzer

Shrinking
Optimization
Obfuscation
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Shrinking ?
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Classes
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Fields
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Methods
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Optimization ?
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Classes
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Fields
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Methods
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Obfuscation ?
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Classes
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Fields
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Methods
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Keep Rule Analysis
Keep rules prevent R8 from optimizing designated code segments. Review the list below to identify and refine overly broad rules, which will directly improve overall application performance.

Help

Introduction to Table Data

R8 is Android's code shrinker, optimizer, and obfuscator. This report shows how your keep rules constrain R8 — every kept item is one R8 couldn't shrink, optimize, or obfuscate. Higher percentages mean more of your app is locked in place.

Legend
Obfuscation Score
% of classes/fields/methods R8 was free to rename. Higher = better.
Optimization Score
% of classes/fields/methods R8 was free to optimize. Higher = better.
Shrinking Score
% of classes/fields/methods R8 was free to remove. Higher = better.
Kept Items (higher is worse)
Total number of items kept by this rule. Higher numbers indicate a larger impact on APK size.
Blocked By Rule
Specific actions blocked by this rule (e.g., Optimization, Shrinking).
Identical Rules
Rules that match the exact same set of items.
Subsumed By
Rules that are covered by a broader rule.
Unused Rules
Rules that do not match any items in the application.
Lenses (All / Identical / Subsumed / Unused)
Different perspectives to view the rules.
Documentation
R8 keep rule reference developer.android.com Official guide to shrinking, obfuscation, and optimization with R8.
Reduce APK size developer.android.com Patterns and tools for minimizing the footprint of your release build.