Bytecode Viewer

The tool accepts bytecode inputs in several forms: raw byte streams, hex-encoded sequences, base64 blocks, or binary class files. It does not execute code; instead it parses the byte stream according to the selected format (Java class bytecode, or generic JVM instruction streams) and generates a structured disassembly. Each instruction is annotated with its offset, mnemonic, and operands; where available, stack effects are indicated. The design targets engineers, security researchers, and educators who need an immediate, trustworthy view of low-level behavior without a full decompiler.

Core logic normalizes inputs, identifies the format from metadata or content heuristics, then applies a format-specific decoding table to yield human-readable instructions. The tool provides optional views such as a raw opcode listing, a decompiled-like sequence, and a comparison view that highlights differences across two bytecode samples. Advanced features include filtering by opcode, grouping by method or code block, and exporting results as JSON or CSV. The system emphasizes deterministic mappings from bytes to instructions and preserves original offsets for traceability, enabling precise debugging and security analysis.

Beneficiaries include Java developers, security researchers, and educators who require rapid inspection of bytecode without a heavy toolchain. Unique value propositions are multi-format support, side-by-side comparisons, and lightweight, shareable outputs ideal for code reviews or teaching. Use cases include verifying compiler optimizations, auditing obfuscated bytecode, and teaching instruction flow. Core differentiators include accurate format decoding, non-intrusive analysis, and exportable structured results. Data is input-only for analysis; no execution or transformation beyond disassembly is performed, and the tool remains neutral to language variants.