Developer Tools
Free online developer tools that run entirely in your browser. No data is sent to any server — your input stays on your machine.
JSON Formatter & Viewer
Format, validate, and explore JSON data with a full-featured editor and interactive tree view.
Base64 Encode & Decode
Encode text or files to Base64 and decode Base64 back to text or binary. Supports standard and URL-safe variants.
URL Encode & Decode
Encode and decode URL components. Includes a URL parser that breaks URLs into protocol, host, path, query parameters, and fragment.
JWT Decoder & Debugger
Decode and debug JSON Web Tokens — inspect header, payload, and signature with claim explanations, HMAC signature verification, and live expiry calculations.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input. All hashing runs locally in your browser.
UUID Generator
Generate random v4 UUIDs. Supports bulk generation and multiple format options.
Pastebin
Share code snippets via URL. Syntax highlighting for multiple languages. No data stored on any server.
String Counter
Count words, characters, sentences, paragraphs, and analyze text with reading time, word frequency, and more.
PHP Serialize & Unserialize
Convert between JSON and PHP's serialize() format. Inspect WordPress options, session data, and cached values. Runs entirely in your browser.
Regex Tester & Debugger
Test and debug regular expressions with real-time match highlighting, find-and-replace substitution, pattern explanation, captured groups, common pattern library, and a quick reference. Supports all JavaScript regex flags.