Free online tools that just work
A directory of small, fast utilities. Open one, get your answer, get on with your day.
Browse by category
CalculatorsAnswers to the numbers you deal with in real life26 tools · 15 lettersBrowseGeneratorsTools for creating, generating and producing things online5 tools · 3 lettersBrowse
More categories comingConverters, lookups and comparison tools are next. Each new category gets the same directory, search and A–Z browsing you see here.
Popular tools
The ones people open most often.
- Age CalculatorWork out an exact age in years, months and days from any date.Open
- Average CalculatorGet the mean, median, mode and range of any list of numbers.Open
- BMI CalculatorCheck body mass index in metric or imperial units.Open
- Compound Interest CalculatorSee how savings grow with compounding and regular contributions.Open
- Date CalculatorAdd or subtract days from a date, or count days between dates.Open
- Dice RollerRoll any dice using standard notation — 2d6, d20, 4d8+3.Open
Browse A to Z
Every tool in the directory, listed alphabetically. Useful when you know roughly what it's called.
Letters shown in grey have no tools yet. Open the full directory to see every category in one list.
Recently added
- Dice RollerRoll any dice using standard notation — 2d6, d20, 4d8+3.
- Random Date GeneratorGenerate random dates between any two dates, in any format.
- Random Letter GeneratorPick random letters from A–Z, or just the vowels or consonants.
- Random Number GeneratorDraw random numbers from any range, with or without repeats.
Instant results
Every tool runs in your browser and recalculates as you type. Nothing to submit, nothing to wait for.
Nothing leaves your device
No accounts, no uploads, no analytics on what you type. Your numbers stay in the tab.
Explained, not just answered
Each tool shows its working and explains what the result means, so you can check it yourself.