MiniUtil collection
Free Online Developer Tools
Format, encode, decode, inspect, and transform data with practical utilities for web development.
11 tools · Free · No registration
Browse Developer Tools
JSON Formatter
Format and validate JSON data.
Base64 Encoder/Decoder
Convert text to and from Base64.
Hex Converter
Convert numbers to/from hexadecimal.
URL Encoder/Decoder
Encode and decode URLs.
Favicon Path Checker
Check common favicon and app-icon paths on a website.
Google Preview
Preview how your page appears in Google.
IP Address
Get your IP address and details.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text.
HTML Encoder/Decoder
Encode text as HTML entities or decode entities back to text.
JWT Decoder
Inspect JWT headers, payloads, and signatures locally in your browser.
UUID v4 Generator
Generate secure random version 4 UUIDs in bulk.