Developer Tools
The utilities every developer bookmarks but rarely finds in one place. Format and validate JSON, encode and decode Base64 and URLs, test regular expressions with live match highlighting, decode JWT tokens, convert Unix timestamps, generate UUIDs, and merge or diff JSON structures — all the building blocks for debugging, testing, and shipping web applications faster.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings instantly.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats.
HTML Entity Encoder / Decoder
Convert special characters to HTML entities and vice versa.
JSON Diff
Compare two JSON files side-by-side with an intuitive visual diff tool highlighting added, removed, and changed keys.
JSON Flattener
Convert nested JSON objects into flat key-value pairs using dot, bracket, or underscore notation, and vice versa.
JSON Formatter / Validator
Format, beautify, and validate JSON data with syntax highlighting.
JSON Merger
Merge two JSON objects/arrays with various conflict resolution strategies.
JSON Stringify / Parse Tester
Test JSON.stringify() and JSON.parse() operations with instant results.
JWT Decoder
Decode JSON Web Tokens (JWT) to view header and payload claims securely offline.
Regex Tester
Test and debug regular expressions with real-time match highlighting.
Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and vice versa.
URL Encoder / Decoder
Encode or decode URL components for safe transmission in web requests.
UUID Generator
Generate random UUIDs (v4) in bulk with one click.