Code and Data Formatting Tools
- Format copied payloads before sharing
- Inspect JSON, Base64, Protobuf and byte-level content
- Convert config and table data, or test crypto, RSA and HTTP-related inputs
A technical explanation of Unicode, UTF-8, Shift-JIS, byte sequences, mojibake, and how to debug encoding problems with small samples.
JSONPath for API Payloads: Querying Nested Data Without Writing a ScriptA technical introduction to JSONPath as a debugging tool for nested JSON responses, including paths, filters, arrays, and implementation differences.
Hex and Bytes Explained: Reading File Headers, Encodings, and Binary CluesA technical guide to hexadecimal inspection, byte order, file signatures, BOM markers, and why byte-level debugging helps with format problems.
RSA Keys Explained: Encryption, Signatures, Padding, and Private Key SafetyA technical article on RSA public and private keys, why padding matters, how signing differs from encryption, and why demos are not key management.
JSON and CSV Are Not Equivalent: What Gets Lost During ConversionA practical technical article on converting between JSON and CSV, including nesting, headers, quoting, nulls, types, and spreadsheet assumptions.
JWTs Explained: Decoding Claims Without Confusing Them With ValidationA practical explanation of JWT structure, claims, Base64URL encoding, signatures, and why decoding a token is not the same as trusting it.
Generate UUIDs, passwords, TOTP codes, hashes, and quick security check values.
Network and DevOps ToolsCheck IP ranges, HTTP status, headers, user agents, Docker commands, and common operations data.
Data Format Conversion ToolsConvert and inspect JSON, CSV, XML, YAML, TOML, colors, text encodings, and structured data.
Tools In This Collection
JSON Formatter
Format, validate, minify, sort keys and inspect JSON outline locally.
Base64 Encoder / Decoder
Encode/decode Unicode text, URL-safe Base64, and small files in the browser.
URL Encoder / Decoder
Encode/decode URL components or full URLs and inspect query parameters.
Base Converter
Convert numbers across bases and transform text into hex, binary, Base64 and Unicode bytes.
HTTP Status Code Lookup
Search and filter common HTTP status codes with bilingual explanations, categories and troubleshooting hints.
Protobuf Encoder / Decoder
Encode JSON into Protobuf bytes or decode hex / Base64 Protobuf payloads with a .proto schema in the browser.
JWT Decoder
Decode JWT header and payload locally, inspect claims, expiry times and raw Base64URL segments.
XML Formatter
Format and validate XML locally with a clean pretty-printed output.
YAML Formatter
Format and validate YAML locally with stable indentation and clean output.
TOML Formatter
Format and validate TOML locally for config files and structured settings.
Docker Run to Compose
Convert common docker run commands into a starter docker-compose service block.
JSON ⇄ CSV Converter
Convert JSON arrays and CSV tables both ways in the browser, with headers, delimiter choice and quick validation.
AES / DES Encryption Tool
Encrypt or decrypt short text with AES, DES or 3DES in the browser, with selectable block mode, padding, IV and output format.
Color Converter
Convert HEX, RGB, HSL and HSV colors, inspect alpha values, pick colors visually and preview palettes instantly.
ASCII Table
Look up printable ASCII codes, control names and character conversions between decimal, hex and binary.
Hex Editor
Inspect text or files as hex bytes, edit hexadecimal content, and decode it back to text locally in the browser.
RSA Key Tool
Generate browser-side RSA key pairs and use them for short text encryption, decryption, signing and verification.
Regex Tester
Test JavaScript regular expressions, inspect matches, groups and replacements, and iterate with live sample text in the browser.
JSONPath Evaluator
Evaluate JSONPath expressions against JSON data, inspect matched paths and preview results with GitHub-style highlighted JSON output.
JSON / YAML / TOML / XML Converter
Convert structured data between JSON, YAML, TOML and XML, validate input, and preview the output with GitHub-style code highlighting.
Text Encoding Converter
Convert text bytes between UTF-8, UTF-16, Shift-JIS, EUC-JP and other browser-safe encodings, then inspect normalized text and hex bytes.
HTTP Request Header Reference
Look up common HTTP request headers and quickly review client, auth and caching related fields.
HTTP Response Header Reference
Browse common HTTP response headers, understand caching, security and delivery-related fields.
JWT Encoder
Generate HS256, HS384 or HS512 JSON Web Tokens directly in the browser for testing and local workflows.
JSON Minify
Minify JSON instantly in the browser and remove unnecessary whitespace before shipping data elsewhere.
Slug Generator
Turn titles or phrases into clean URL-friendly slugs with case, separator and trim options.
URL Parser
Break a URL into protocol, host, path, query and hash fields, then inspect every parameter clearly.
Query String Builder
Build clean query strings from key-value pairs and preview the final URL segment instantly.