Free Online Tools
Calculators, converters, generators, and utilities — all free, no sign-up required.
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Calculators
BMI Calculator
Body Fat Calculator
BMR Calculator
Calorie Calculator
Macro Calculator
Ideal Weight Calculator
Water Intake Calculator
Sleep Calculator
Blood Alcohol Calculator
Running Pace Calculator
Due Date Calculator
Ovulation Calculator
Pregnancy Week Calculator
Mortgage Calculator
Compound Interest Calculator
Investment Calculator
Investment Returns Calculator
Retirement Calculator
Salary Calculator
Budget Calculator
Savings Goal Calculator
Debt Payoff Calculator
Tip Calculator
Discount Calculator
Fuel Cost Calculator
Gpa Calculator
Grade Calculator
Birthday Countdown
Event Countdown
Christmas Planning
Converters
Unit Converter
Currency Converter
Inches to Feet
KM to Miles
MM to Inches
Temperature Converter
Timezone Converter
Text Case Converter
Binary Translator
Morse Code
Roman Numeral Converter
Base64
URL Encoder / Decoder
Color Converter
HTML Entities
YAML to JSON Converter
JSON Formatter
SQL Formatter
Markdown Preview
Cron Expression Generator
Developer Tools
ASCII Table
Regex Tester
UUID Generator
JWT Decoder
HTML Preview
Diff Checker
CSV Viewer
MIME Types Reference
SEO Meta Tag Generator
Password Strength Checker
Color Picker
Color Palette Generator
Gradient Builder
Box Shadow Generator
Typography Tester
Grid Layout Generator
Emoji Picker
Lorem Ipsum Generator
Browser Info
What Is My IP
Word Counter
Character Counter
Accessibility Checker
PageSpeed Analyzer
Broken Link Checker
Redirect Checker
Domain Inspector
DNS Lookup
WHOIS Lookup
SSL Inspector
Sitemap Generator
HTTP Status Checker
Responsive Checker
Open Graph Generator
Keyword Density Checker
HTML to PDF
Image Compressor
Favicon Downloader
Anagram Solver
Word Unscrambler
Wordle Solver
Random Word Generator
Accessibility Checker
Website Performance Analyzer
Broken Link Checker
Domain Inspector
Sitemap Generator
HTTP Status & Headers Checker
Responsive Website Checker
Open Graph Image Generator
Keyword Density Checker
HTML to PDF
Image Compressor
Favicon Extractor
Generators
QR Code Generator
Random Number Generator
Random Quote Generator
Random Fact Generator
Random Name Generator
Password Generator
List Randomizer
Decision Maker
Dice Roller
Joke Generator
Programming Jokes
Cat Facts
Dog Pics
Anime Quotes
Trivia
Cocktail Recipes
Bible Verse Generator
NASA Astronomy Picture
Hacker News Reader
Weather Lookup
Country Lookup
Timers & Clocks
Health & Fitness
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toolhearth brings practical calculators, converters, generators, and browser-based utilities into one fast, free collection. Tools run directly in your browser and do not require an account.
Use the categories above to find everyday health, finance, developer, writing, and time tools. Important decisions should always be checked against qualified professional advice and authoritative sources.