Free tools worth fiddling with
Calculators, generators, quizzes, and games that work the moment the page loads. No account, no sign-up.
59 free tools, one fiddle at a time
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Calculators
BMI, tip, GPA & more.
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Generators
Quick random tools.
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Quizzes
Quick and shareable.
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Time Pass Games
A few minutes to kill.
Calculators
- Tip Calculator
- Age Calculator
- Percentage Calculator
- GPA Calculator
- Days Until Calculator
- BMI Calculator
- Discount Calculator
- Pregnancy Due Date Calculator
- Time Duration Calculator
- Loan Payment Calculator
- Compound Interest Calculator
- Calorie Calculator
- Unit Converter
- Pace Calculator
- Sales Tax Calculator
Generators
- Random Name Generator
- Decision Wheel
- Password Generator
- Dice Roller
- Random Number Generator
- Would You Rather
- Team Splitter
- Coin Flip
- Raffle Picker
- UUID Generator
- QR Code Generator
- Lottery Number Generator
- Color Palette Generator
- Writing Prompt Generator
- Username Generator
Quizzes
- What’s Your Friend Group Role?
- What’s Your Love Language?
- How Good a Friend Are You?
- Personality Type Quiz
- Big Five Personality Snapshot
- Career Path Quiz
- Red Flag or Green Flag?
- Which Decade Do You Belong In?
- What’s Your Aesthetic?
- General Knowledge Speed Round
- What’s Your Travel Style?
- Introvert or Extrovert?
- What’s Your Ideal Weekend?
- What’s Your Hidden Talent?
Games
What's here
Fiddlepop is a set of small, single-purpose tools. The calculators handle everyday sums: splitting a bill, a loan payment, a running pace, a due date. The generators produce random results you can trust to be fair, from a dice roll to a password built with your browser's cryptographic random source. The quizzes are short and say plainly whether they're for fun or loosely based on an established model. The games are made for a few spare minutes and work with a keyboard or a touchscreen.
How the tools work
Everything runs in your browser. When you type a bill amount or a birth date, the calculation happens on your device and the number is never sent anywhere. Each calculator page explains the formula it uses and shows a worked reference table, so you can check a result instead of taking it on faith. Games keep your best score in your browser's local storage, which is why it survives a refresh but won't follow you to another device.
Free, with ads
The site is paid for by advertising. There's no premium version, nothing behind a paywall, and no email sign-up in front of any tool. If something is broken or you'd like a tool added, the contact page goes to a real inbox.