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Nib

All tools

25 fast, free utilities. Most run entirely in your browser — nothing you enter is uploaded.

Calculators

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Percentage CalculatorCalculate percentages, changes and shares.Age CalculatorCalculate exact age from a birth date.Ratio CalculatorSimplify, scale and solve ratios.Discount CalculatorCalculate sale prices and savings.Date Difference CalculatorDays, weeks and months between dates.

Finance Calculators

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Mortgage CalculatorEstimate your monthly mortgage payment.Loan CalculatorCalculate loan payments and total interest.Compound Interest CalculatorSee how savings grow over time.Tip CalculatorCalculate tips and split the bill.Sales Tax CalculatorAdd or remove sales tax from a price.

Developer Tools

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JSON FormatterFormat, validate and minify JSON.UUID GeneratorGenerate v4 and v7 UUIDs instantly.Base64 Encoder / DecoderEncode and decode Base64 text.URL Encoder / DecoderPercent-encode and decode URLs.Unix Timestamp ConverterConvert Unix time to dates and back.

Text Tools

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Word CounterCount words, characters and reading time.Character CounterCount characters against common limits.Text Case ConverterConvert text between letter cases.Text DiffCompare two texts and see the changes.Remove Duplicate LinesDelete duplicate lines from a list.

Time & Random

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Random Number GeneratorGenerate random numbers in a range.Coin FlipFlip a fair virtual coin.Dice RollerRoll dice with any number of sides.Online TimerA simple countdown timer.StopwatchPrecise stopwatch with lap times.