rifaldo.js

75+ free online tools for developers and everyday use. Everything runs in your browser — no server, no account, no install.

Text Tools

• Word Counter
• Case Converter
• Reverse Text
• Remove Duplicates
• Sort Lines
• Slugify
• Lorem Ipsum Generator
• Text Diff
• ROT13
• Binary Text Converter
• Palindrome Checker
• Quick Notes
• Markdown Preview

Developer Tools

• JSON Formatter
• JSON Minifier
• Base64 Encode/Decode
• URL Encode/Decode
• HTML Encode/Decode
• JWT Decoder
• UUID Generator
• Regex Tester
• SHA Hash Generator
• Timestamp Converter
• Color Picker
• CSS Minifier
• Password Strength Checker

Calculators

• Percentage Calculator
• Tip Calculator
• Fraction Calculator
• BMI Calculator
• Age Calculator

Converters

• Length Converter
• Weight Converter
• Temperature Converter
• Area Converter
• Volume Converter
• Speed Converter
• Data Size Converter
• Number Base Converter

Finance Tools

• Loan Calculator
• Compound Interest
• Discount Calculator
• VAT Calculator
• Savings Goal
• Salary per Hour
• Currency Format

Health Tools

• BMI Calculator
• Ideal Weight
• BMR & Daily Calories
• Water Intake
• Due Date Calculator

Time Tools

• Countdown Timer
• Stopwatch
• Pomodoro Timer
• Date Difference
• World Clock
• Alarm

Image Tools

• QR Code Generator
• Image to Base64
• Image Resize
• Image Compress

Random Tools

• Password Generator
• Random Number
• Dice Roller
• Coin Flip
• Name Picker
• Yes or No
• Rock Paper Scissors

Web Tools

• Meta Tag Preview
• User Agent
• Typing Speed Test

All tools are open source and run entirely in your browser using JavaScript. No data is sent to any server. Visit rifaldojs.vercel.app to use them.