Decode MessagePack Binary to JSON Instantly (Hex or Base64)
Decode MessagePack binary data (hex or base64) to human-readable JSON. Inspect each token with its byte offset, format code, type, and decoded value — entirely in your browser.
How to Use MessagePack Inspector
How to Use MessagePack Inspector
Step 1: Get Your Binary Data
Obtain MessagePack-encoded bytes from:
- A network response body (copy as hex from DevTools)
- A Redis cache entry serialized with msgpack
- An API payload using msgpack instead of JSON
- A log file or debug output showing hex bytes
Step 2: Choose Input Format
- Auto — detects hex vs base64 automatically (default)
- Hex — space-separated or continuous hex (e.g.
82 a4 6e 61 6d 65) - Base64 — standard or URL-safe base64 strings
Step 3: Inspect the Output
JSON Output tab: Pretty-printed JSON with syntax highlighting showing the fully decoded message.
Bytes View tab: Token-by-token breakdown showing:
- Byte offset (where in the buffer each value starts)
- Format byte (the MessagePack type code)
- Type name (fixmap, fixstr, uint8, float32, etc.)
- Decoded value
Supported Types
All standard MessagePack format types are supported: fixint, fixmap, fixarray, fixstr, nil, bool, uint8–uint64, int8–int64, float32, float64, str8–str32, bin8–bin32, array16/32, map16/32, fixext1–16, ext8–ext32.
Frequently Asked Questions
Most Viewed Tools
TOTP Code Generator
Generate time-based one-time passwords from a TOTP secret key. Enter your base32 secret, choose a period and digit length, and get the current and next codes with a live countdown timer. Useful for testing and debugging 2FA integrations.
Use Tool →JSON to Zod Schema Generator
Generate Zod validation schema code from a JSON sample object. Infers z.string(), z.number(), z.boolean(), z.array(), z.object(), and z.null() types automatically. Handles nested objects, arrays of objects with optional field detection, and outputs copy-ready TypeScript with import and z.infer type alias.
Use Tool →JSONL / NDJSON Formatter
Format, validate, and inspect JSON Lines (JSONL) and NDJSON files. Validates each line individually, reports parse errors by line number, outputs compact JSONL or a pretty-print preview, and lets you download the cleaned file.
Use Tool →Secret and Credential Scanner
Scan pasted text, code, or config files for accidentally exposed API keys, tokens, passwords, and private keys. Detects 50+ secret types across AWS, GitHub, Stripe, OpenAI, and more — all client-side, nothing leaves your browser.
Use Tool →TLS Cipher Suite Checker
Check TLS protocol version compatibility and cipher suite strength ratings against current best practices. Supports IANA and OpenSSL cipher names — rates each suite as Strong, Weak, or Deprecated and explains why.
Use Tool →Password Entropy Calculator
Calculate the information-theoretic bit entropy of any password or API key. Detects character set pools automatically, shows the total number of possible combinations, and estimates crack time across five attack scenarios from rate-limited web logins to GPU cracking clusters.
Use Tool →TOML Config Validator
Validate TOML configuration file syntax and report errors with line numbers. Paste any TOML content — Cargo.toml, pyproject.toml, config.toml — and instantly see a green checkmark with key counts and structure stats, or a precise error message pointing to the exact line. Includes a collapsible JSON structure preview to confirm what was parsed.
Use Tool →Content Security Policy Generator
Build Content Security Policy headers interactively. Toggle directives like script-src, style-src, and img-src, select allowed source tokens, and add custom origins. Instantly outputs your CSP as an HTTP header, meta tag, Nginx directive, or Apache header.
Use Tool →Related Development Tools
QR Code Generator
FeaturedCreate custom QR codes for URLs, text, and contact info
Use Tool →TOML to JSON Converter
Convert TOML configuration files to JSON format instantly. Paste any TOML — Cargo.toml, pyproject.toml, config.toml — and get clean, pretty-printed JSON output. Supports all TOML types: strings (basic, literal, multi-line), integers (decimal, hex, octal, binary), floats, booleans, datetimes, arrays, inline tables, tables, and arrays of tables.
Use Tool →JSONL / NDJSON Formatter
Format, validate, and inspect JSON Lines (JSONL) and NDJSON files. Validates each line individually, reports parse errors by line number, outputs compact JSONL or a pretty-print preview, and lets you download the cleaned file.
Use Tool →HTML Table to CSV Extractor
Extract HTML table markup and convert it to clean CSV format. Paste any HTML snippet or full page source — the tool finds the table, parses thead and tbody rows, handles colspan and rowspan merging gracefully, and outputs a properly quoted CSV ready to download or paste into a spreadsheet. When multiple tables are found, switch between them with a click.
Use Tool →TOML Config Validator
Validate TOML configuration file syntax and report errors with line numbers. Paste any TOML content — Cargo.toml, pyproject.toml, config.toml — and instantly see a green checkmark with key counts and structure stats, or a precise error message pointing to the exact line. Includes a collapsible JSON structure preview to confirm what was parsed.
Use Tool →INI / Properties to JSON Converter
Convert INI configuration files and Java .properties files to JSON format instantly. Paste any INI file — php.ini, app.ini, Windows .ini — or a Java .properties file with dotted keys and get clean, structured JSON output. Supports section headers, inline comments, quoted values, boolean coercion (true/false/yes/no/on/off), numeric parsing, continuation lines, and Unicode escapes.
Use Tool →JSON to TypeScript Interface
Generate TypeScript interfaces from JSON objects instantly. Infers types for strings, numbers, booleans, arrays, and nested objects. Detects optional fields from array element merging, handles null values, and outputs clean, ready-to-use interface definitions.
Use Tool →CSV Pivot Table Generator
Group and aggregate CSV data by one or more columns to create summary pivot views. Supports Count, Sum, Average, Min, and Max aggregations with multi-column grouping. Paste or upload any CSV, select group-by columns and aggregation type, and download the pivot summary as a new CSV file. Runs entirely in your browser.
Use Tool →Share Your Feedback
Help us improve this tool by sharing your experience