Developer Tools
Free online developer tools. All processing happens in your browser.
JSON Formatter
Format and validate JSON with syntax highlighting
Base64 Encode/Decode
Encode and decode Base64 strings
URL Encode/Decode
Encode and decode URL components
Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes
Regex Tester
Test regular expressions with live matching
Color Picker
Pick colors and convert between HEX, RGB, and HSL
Password Generator
Generate strong, secure random passwords
UUID Generator
Generate UUID v4 random identifiers instantly
Timestamp Converter
Convert Unix timestamps to dates and vice versa
JSON Editor
Edit and explore JSON with a visual tree view
JWT Decoder
Decode and inspect JSON Web Tokens
Cron Generator
Build cron expressions visually with presets
What Are Online Developer Tools?
Online developer tools provide essential utilities for web developers and programmers. toolsfreely.com offers a JSON formatter, Base64 encoder/decoder, URL encoder/decoder, hash generator, regex tester, color picker, password generator, UUID generator, and Unix timestamp converter. All tools process data locally in your browser for privacy and speed.
How to Use These Dev Tools
Pick a tool from the grid above, paste your input data, and get instant results. The password generator creates strong random passwords using crypto.getRandomValues(). The UUID generator produces v4 identifiers instantly. The timestamp converter handles Unix epoch to date conversions. No data ever leaves your device.