Free online tools that work instantly

A directory of free calculators, converters, text utilities, and developer tools. Every tool opens instantly, works on mobile, and processes your input locally in the browser.

• JSON Formatter
• Base64 Tool
• URL Encoder
• JWT Decoder
• UUID Generator
• Regex Tester
• Hash Generator
• HTML Encoder
• CSV to JSON
• JSON to CSV
• Markdown to HTML
• Color Converter
• Gradient Generator
• Box Shadow
• HTTP Status Codes
• Meta Tag Generator
• Robots.txt Generator
• User Agent Parser
• Password Generator
• Password Strength
• Card Validator
• Email Validator
• Percentage Calculator
• Average Calculator
• Fraction Calculator
• Ratio Calculator
• Number Base Converter
• Roman Numerals
• GPA Calculator
• Random Numbers
• Unit Converter
• Age Calculator
• Loan Calculator
• Mortgage Calculator
• Compound Interest
• Simple Interest
• Tip Calculator
• Discount Calculator
• Sales Tax Calculator
• Margin & Markup
• ROI Calculator
• Break-Even Calculator
• Savings Goal
• Salary to Hourly
• Inflation Calculator
• Word Counter
• Case Converter
• Remove Duplicates
• Line Sorter
• Find & Replace
• Diff Checker
• Lorem Ipsum
• Slug Generator
• Word Frequency
• Remove Line Breaks
• Reverse Text
• Days Between Dates
• Date Add & Subtract
• Time Duration
• Business Days
• Countdown Timer
• Timestamp Converter
• BMI Calculator
• Calorie Calculator
• Ideal Weight
• Body Fat Calculator
• Water Intake
• Macro Calculator
• Due Date Calculator
• Low Competition Keywords
• Long-Tail Generator
• Keyword Clustering
• Search Intent Classifier
• Content Brief Generator
• Cannibalization Checker
• Title & Meta Checker
• IP Address Checker
• Screen Resolution
• Rich Text to HTML
• Word Game
• CodeShare

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