MessagePack Inspector
MessagePack Inspector: Decodes MessagePack binary header bytes (0x92 = 2-element array, 0x01 = integer 1, 0xa4 = 4-byte fixstr) into JSON.
About this messagepack inspector
MessagePack Inspector — browser-based utility.
How this tool works
Implements client-side MessagePack Inspector operations. Decodes MessagePack binary header bytes (0x92 = 2-element array, 0x01 = integer 1, 0xa4 = 4-byte fixstr) into JSON specifically designed for an iot systems developer decodes a binary messagepack packet transmitted by a field telemetry sensor.
- Lexical Scanning: Scans the input stream character by character, identifying string literals, escape sequences, numbers, and structural delimiters without converting numeric tokens to native floats.
- Syntax Validation & Invariant Checking: Enforces RFC 8259 syntax constraints, verifying matching braces, balanced brackets, unescaped control characters, and duplicate key collision detection.
- AST Assembly & Structural Transformation: Constructs an immutable memory tree representation, applying structural indentation, key alphabetical sorting, or schema-mapped transposition.
- Serialization & Diagnostic Formatting: Emits formatted, color-coded, or minified text with byte-length calculation, structural nesting depth metrics, and RFC-compliant line terminators.
Worked example
Scenario: Inspect a small hexadecimal MessagePack array.
Sample input:
Processing: Convert hexadecimal bytes to binary and decode the MessagePack array and fixstr tokens locally.
Illustrative output:
Limits and verification
Fails with descriptive line and column diagnostics when encountering unquoted object keys, single-quoted strings (in strict JSON mode), trailing commas (in RFC 8259 mode), or unescaped ASCII control codes (0x00 through 0x1F). Objects with circular self-references are intercepted by identity tracking sets before serialization begins. Input size is bounded by browser memory (typically 50-100 MB).
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the MessagePack Inspector workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
Which MessagePack value can this inspector decode?+
The hexadecimal bytes `92 01 a4 43 5a 4f 41` decode as an array containing integer 1 and UTF-8 string `CZOA`, rendered as JSON `[1,"CZOA"]`.
How should MessagePack bytes be entered?+
Enter accepted hexadecimal text, then choose Run locally. The tool decodes one supported top-level value and serializes the result as JSON.
Which MessagePack limits matter?+
It rejects malformed hex, truncation, unsupported tags, invalid text, and trailing bytes after one top-level value. The supported subset is not a general MessagePack runtime.
Does this operation upload MessagePack data?+
No. It converts entered hexadecimal text to a JSON result in the browser. It does not upload a file, connect to a MessagePack service, or inspect network traffic.