Swift Deobfuscator & Symbol Restorer

The analyzer scans Swift variable, function, class, and struct declarations for names that are unusually short (1-2 characters) or follow obfuscated naming patterns like _0x, _x0, or single-letter names. It filters out Swift reserved words (class, struct, func, var, let), built-in types (Int, String, Array, Dictionary), and standard library functions to reduce false positives. Common short but legitimate Swift names (id, i, j, k, n) are also filtered.

Yes, Base64 strings passed to Data(base64Encoded:) can be decoded using the browser atob() function, and they are. The tool also detects long base64-like strings that may contain encoded data, decoding them and verifying the output contains readable text before reporting high confidence. If the decoded output contains readable URLs, API endpoints, or recognizable text patterns, the confidence is rated as Very High (5).

Confidence scores range from 1 to 5. Score 5 (Very High) is assigned when Base64 decoded content contains readable text like URLs, or when hex byte arrays decode to meaningful strings. Score 4 (High) is for successful Base64 decodes or clear number obfuscation patterns. Score 3 (Medium) is for short identifier detections and string concatenation patterns. Score 2 (Low) is for Data pattern detections and weak indicators.

No. The tool covers the most common Swift obfuscation patterns but cannot handle all methods. It cannot decode strings built through runtime Data construction with dynamic keys, decrypt content encrypted with CryptoKit or CommonCrypto, or handle Swift binaries compiled with commercial obfuscators. Advanced obfuscation may require dynamic analysis in an iOS/macOS runtime environment.

The annotated code view displays your original Swift source code with inline comments added at each line where obfuscation was detected. Each annotation includes the detection technique name (e.g., "Short/Obfuscated Identifiers" or "Base64-Encoded String") and a brief description of what was found, such as the decoded value or analysis. This makes it easy to visually scan through the code and understand every obfuscation point.

Absolutely. The Swift Deobfuscator runs entirely in your browser. Your Swift code, all detected indicators, decoded values, analysis results, and annotated output are never uploaded to any server, stored in any database, or transmitted over the network. All processing happens locally on your device with no API calls or data collection.

An iOS app decompiler converts compiled Mach-O binaries back into readable Swift/ObjC code. This tool instead analyzes already-readable Swift source code for intentional obfuscation techniques - it decodes hidden strings, reveals obfuscated identifiers, and flags suspicious patterns. It does not reconstruct source from compiled binaries. For decompilation, you would need a tool like Hopper, Ghidra, or class-dump.

Yes - 100% free with no signup, no account, and no usage limits. Analyze as much Swift code as you need, as many times as you want. There are no premium tiers, hidden charges, or rate limits. The tool runs entirely in your browser - your code never leaves your device.